2019-12-02 Tracking News

Contents on 2 December '19

Traffic Report -- five objects
IAU Minor Planet Center
- NEOCP Activity -- 73 listings
- New MPECs -- eleven MPECs
Observers -- 23 observers
Impact Risk Monitoring -- six objects
Chronology

Asteroid/Comet Connection (A/CC) Resources:

Consolidated Risk Tables - the CRT page
Of 1077 risk-listed objects, 554 have had news in the last 31 days. Updated at 1636 UTC on 2 Dec.
Ephemerides for risk-listed objects & close passers
News archive (old) & news image catalog (discontinued)
Object Links - mainly for radar targets & close passers (mostly discontinued)
Observing Campaigns (old)

The latest A/CC news is available via framed access, RSS news feed, or redirection.

Navigation tips: Use the << and >> arrows on the menus for each regular section (Observers, Risks, etc.) to move to the previous and next day's news for that section. Use the Index menu item to access specific days through a calendar interface. To keep track of what's new each day, watch the Chronology section.

Traffic Report on 2 December '19

Five objects reported inside ten LD

Five minor (and maybe someday "miner") objects are reported within ten lunar distances (LD) of Earth today. The nearest are 2019 WH2, headed away from 3.70 to 5.04 LD, and 2019 WN1, outbound from 4.3 to 5.0 LD*.

Neighborhood Traffic - sorted by Earth passage distance, grouped by 1.0, 2.41, 5.0 & 10.0 LD boundaries
Earth passage	I D	~Size	Distance today	Inside ten LD	Notes
0.85 LD Nov. 30	2019 WJ4	7 m	4.91 to 9.03 LD	Nov. 28 - tomorrow	intruder

3.43 LD yesterday	2019 WH2	15 m	3.70 to 5.04 LD	Nov. 27 - Dec. 5	DOU
4.3 LD yesterday*	2019 WN1	17 m	4.3 to 5.0 LD	Nov. 27 - Dec. 5	EPU +/- 3.15 hours*

5.81 LD today	2019 WH4	12 m	5.81 LD	Nov. 27 - Dec. 6	Earth closest at 0543 UTC - DOU
8.5 LD tomorrow*	2017 AP4	14 m	8.6 from 9.1 LD	Nov. 30 - Dec. 7	EPU +/- 2.97 days*

Approaching - sorted by 10-LD bubble entry date
4.8 LD Dec. 9*	2019 WO2	32 m	12.5 from 14.1 LD	Dec. 4 - 14	EPU +/- 10 mins.* - DOU
9.8 LD Dec. 9*	2019 WT3	40 m	19.1 from 21.3 LD	Dec. 8 - 10	EPU +/- 37 mins.*
6.4 LD Jan. 11*	2019 WC5	109 m	126.6 from 130.3 LD	Jan. 9 - 14	EPU +/- 3.13 days*, risk
* EPU = Earth passage uncertainty

This report was generated at 1910 UTC with follow-up in today's DOU MPEC for approaching 2019 WO2, passing risk-listed 2019 WH4, outbound 2019 WH2, and five departed objects: 2019 WU3, 2019 WQ3, 2019 WV, 2019 UO13, and risk-listed intruder 2019 WG2.

Notes: Ten times the distance to the Moon (ten LD) has no astronomical importance but is a useful boundary for reporting about transient natural objects that approach our planet's gravitational sphere of influence (SOI), which has a radius of about 2.41 LD from Earth's center. This puts a focus on some of the most important and very best NEO observation work, representative of the much larger NEO discovery and tracking effort. Object temporal distances are derived by A/CC from JPL Horizons data. "LD*" indicates some uncertainty in object passage time and distance. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.

NEOCP Activity on 2 December '19

The MPC's NEO Confirmation Page has 73 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 73 objects listed. Of these, 58 were "one nighters." So far The Tracking News has counted a total of 110 listings on the NEOCP today.

To learn how observers use the NEOCP, see the Practical guide on how to observe NEOCP object at Suno Observatory by Birtwhistle et al.

New MPECs on 2 December '19

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been eleven MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2019-X15 time-stamped "00:18 UT" - 2019 WO5 - see below
MPEC 2019-X16 time-stamped "07:03 UT" - 2019 SJ11 - see below
MPEC 2019-X17 time-stamped "07:12 UT" - 2019 WX5 - see below
MPEC 2019-X18 time-stamped "07:13 UT" - 2019 WY5 - see below
MPEC 2019-X19 time-stamped "07:15 UT" - 2019 WZ5 - see below
MPEC 2019-X20 time-stamped "07:17 UT" - 2019 WA6 - see below
MPEC 2019-X21 time-stamped "08:04 UT" - 2000 LK10 - see below
MPEC 2019-X22 time-stamped "08:09 UT" - 2019 WB6 - see below
MPEC 2019-X23 time-stamped "12:01 UT" - Daily Orbit Update - see below
MPEC 2019-X24 time-stamped "14:45 UT" - 2019 WC6 - see below
MPEC 2019-X25 time-stamped "15:10 UT" - 2018 AL13

MPEC 2019-X25 - "15:10 UT" - 2018 AL13

K18A13L 2018 AL13 (H=20.7 ~245m) from UH/Tholen NEO Follow-Up 2.24m Telescope (Nov. 27.37p1 at G=23.67 & 28.34p1 at G=23.75)

MPEC 2019-X24 - "14:45 UT" - 2019 WC6

K19W06C 2019 WC6 (borderline-small, H=22.0 ~135m) was picked up at 0831 UT on 30 Nov. by Pan-STARRS 1 (PS1), observing it at Nov. 30.36-39p3. This detection was confirmed by Visnjan Obs. (Nov. 30.88p3), Great Shefford Obs. (Dec. 1.92-94p4), Galilei Obs. (Dec. 1.99-01p3), Steward Obs. Mt. Lemmon Station (Dec. 2.15-16p4), and Arcadia Obs. (Dec. 2.53-57p4).

<< DOU on 2 December '19 >> MPEC 2019-X23 - "12:01 UT" - Daily Orbit Update

Observations of risk-listed objects
K19W04W 2019 WW4 (arc=5 days, H=19.8 ~371m) from Steward Mt. Lemmon Sta. (Dec. 2.10p4)
K19W04H 2019 WH4 (small asteroid, Q=4.034 AU, arc=7 days, H=27.2 ~12m, close passer) from Great Shefford Obs. (Dec. 2.13-14p3)
K19W03A 2019 WA3 (small asteroid, arc=7 days, H=25.3 ~29m) from the Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) (Dec. 2.23-24p4)
K19W02U 2019 WU2 (small asteroid, arc=17 days, H=24.7 ~39m) from CSS-Kuiper (Dec. 2.24-26p4 at G=21.7-22.7)
K19W02G 2019 WG2 (small asteroid, arc=7 days, H=25.0 ~34m, close passer) from Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) (Dec. 1.23-24p3)
Observations of recently (no longer) risk-listed objects
K19V04L 2019 VL4 (q=0.327 AU, arc=30 days, H=19.6 ~407m) from Steward Mt. Lemmon Sta. (Dec. 2.16p4)
Observations of close-passing objects
K19W03U 2019 WU3 (arc=4 days, H=26.5 ~17m) from Steward Mt. Lemmon Sta. (Dec. 2.22-23p3)
K19W03Q 2019 WQ3 from Al-Fulaij Obs. (Dec. 1.70-72p15) and North Obs. (Dec. 1.85-86p4)
K19W02O 2019 WO2 (arc=7 days, H=25.1 ~32m) from Steward Mt. Lemmon Sta. (Dec. 2.16p4)
K19W02H 2019 WH2 (arc=7 days, H=26.8 ~15m) from LCO Sutherland A (Dec. 1.06-07p3) and Great Shefford Obs. (Dec. 2.18-20p4)
K19W00V 2019 WV (arc=11 days, H=24.9 ~35m, NHATS target) from Steward Mt. Lemmon Sta. (Dec. 2.34-35p3)
K19U13O 2019 UO13 from Steward Mt. Lemmon Sta. (Dec. 2.22-25p4)
Observation campaigns (NHATS targets, radar support)
K19W04T 2019 WT4 (arc=3 days, H=24.0 ~54m, NHATS) from Schwarzschild Obs. (Nov. 30.98-99p4), Dave Balam via Plaskett 1.8m Telescope (Dec. 1.36p5), and Steward Mt. Lemmon Sta. (Dec. 2.28p4)
K19W00W 2019 WW (arc=13 days, H=24.6 ~41m, NHATS) from Great Shefford Obs. (Dec. 1.95p4)
K19U13K 2019 UK13 (NHATS) from Steward Mt. Lemmon Sta. (Dec. 2.20p4)
K19U04D 2019 UD4 (arc=98 days, H=23.0 ~85m, NHATS) from Astronomical Research Obs. Westfield (Nov. 26.12-14p3 at V=21.9-22.1)
-- NHATS target table
Observations of small (H>22.0) & smallish (21.7<H<=22.0) asteroids
K19W04V 2019 WV4 (arc=4 days, H=23.2 ~78m) from Balam/Plaskett (Dec. 1.29-30p5) and Steward Mt. Lemmon Sta. (Dec. 2.21p4)
K19W04P 2019 WP4 (arc=5 days, H=24.5 ~43m) from Great Shefford Obs. (Dec. 1.81-82p3) and Steward Mt. Lemmon Sta. (Dec. 2.20-21p4)
K19W04C 2019 WC4 (arc=7 days, H=22.4 ~112m) from Steward Mt. Lemmon Sta. (Dec. 2.16-17p4)
K19W03Z 2019 WZ3 (arc=4 days, H=24.6 ~41m) from Steward Mt. Lemmon Sta. (Dec. 2.18-19p4)
K19W03Y 2019 WY3 (arc=4 days, H=25.1 ~32m) from Steward Mt. Lemmon Sta. (Dec. 2.19p4)
K19W03R 2019 WR3 (arc=4 days, H=22.7 ~98m) from Al-Fulaij Obs. (Dec. 1.69-70p8) and North Obs. (Dec. 1.89-90p4)
K19W02S 2019 WS2 (i=42.7°, arc=6 days, H=22.4 ~112m) from Steward Mt. Lemmon Sta. (Dec. 2.13p4)
K19W02M 2019 WM2 (arc=7 days, H=22.9 ~89m) from Steward Mt. Lemmon Sta. (Dec. 2.12p4)
K19W02L 2019 WL2 (arc=8 days, H=24.2 ~49m) from Steward Mt. Lemmon Sta. (Dec. 2.25-26p3)
K19W02A 2019 WA2 (arc=8 days, H=24.4 ~45m) from Steward Mt. Lemmon Sta. (Dec. 2.19-20p4)
K19W01Y 2019 WY1 (arc=8 days, H=24.6 ~41m) from Steward Mt. Lemmon Sta. (Dec. 2.24p3)
K19W00T 2019 WT (arc=14 days, H=23.8 ~59m) from Steward Mt. Lemmon Sta. (Dec. 2.24-25p4)
K19W00G 2019 WG (arc=15 days, H=24.2 ~49m) from Steward Mt. Lemmon Sta. (Dec. 2.28-29p3)
K19U11V 2019 UV11 (arc=35 days, H=23.3 ~74m) from ARO Westfield (Nov. 26.08-10p3 at V=22.1-3)
K19U09G 2019 UG9 (arc=38 days, H=24.7 ~39m) from Steward Mt. Lemmon Sta. (Dec. 2.30-31p4)
K19U05E 2019 UE5 (arc=41 days, H=22.4 ~112m) from Steward Mt. Lemmon Sta. (Dec. 2.22-23p4)
K19S10B 2019 SB10 (Q=4.207 AU, arc=57 days, H=22.8 ~93m) from ARO Westfield (Nov. 26.13-16p3 at V=22.0-22.2)
K19R02A 2019 RA2 (Q=4.966 AU, arc=81 days, H=24.0 ~54m) from ARO Westfield (Nov. 26.32-34p4 at V=22.1-3)
K19R01H 2019 RH1 (arc=83 days, H=24.9 ~35m) from ARO Westfield (Nov. 26.29-32p3 at V=21.7-22.1)
K19Q01Z 2019 QZ1 (arc=98 days, H=23.3 ~74m) from ARO Westfield (Nov. 26.24-26p3 at V=22.0-22.3)
K16V01O 2016 VO1 (arc=4 opp, H=23.0 ~85m) from ARO Westfield (Nov. 26.23-25p3 at V=22.2-4) and CSS-Kuiper (Dec. 2.26-27p4 at G=21.8-22.3)
K19W01W 2019 WW1 (arc=9 days, H=21.9 ~141m) from Steward Mt. Lemmon Sta. (Dec. 2.14-15p4)
Observations of other objects
K19W04X 2019 WX4 (arc=4 days, H=20.8 ~234m) from Steward Mt. Lemmon Sta. (Dec. 2.21-22p4)
K19W04U 2019 WU4 (arc=8 days, H=21.5 ~170m) from Steward Mt. Lemmon Sta. (Dec. 2.30p2)
K19W04L 2019 WL4 (arc=6 days, H=21.5 ~170m) from Steward Mt. Lemmon Sta. (Dec. 2.26-28p4)
K19W04G 2019 WG4 (arc=10 days, H=20.5 ~269m) from Holmes/CTIO (Dec. 1.15-17p3)
K19W03M 2019 WM3 from Great Shefford Obs. (Dec. 2.15-17p3)
K19U14N 2019 UN14 (arc=31 days, H=20.7 ~245m) from Holmes/CTIO (Dec. 1.05-07p3)
K19U14A 2019 UA14 (i=72.0°, Q=6.238 AU, arc=35 days, H=18.8 ~589m) from Holmes/CTIO (Dec. 1.20-21p3)
K19U13X 2019 UX13 (arc=33 days, H=21.4 ~178m) from Holmes/CTIO (Dec. 1.28-29p3)
K19U10J 2019 UJ10 (Q=5.122 AU, arc=37 days, H=19.6 ~407m) from Holmes/CTIO (Dec. 1.08-10p3)
K19U07G 2019 UG7 (Q=4.730 AU, arc=39 days, H=21.5 ~170m) from Steward Mt. Lemmon Sta. (Dec. 2.28-29p4)
K19U02J 2019 UJ2 (arc=42 days, H=19.5 ~426m) from SATINO-1 (Oct. 25.90-91p4)
K19S07C 2019 SC7 (arc=65 days, H=21.5 ~170m) from Steward Mt. Lemmon Sta. (Dec. 2.14-15p3)
K19S03R 2019 SR3 (arc=95 days, H=20.3 ~295m) from CSS-Kuiper (Dec. 2.11-12p4)
K19Q05V 2019 QV5 (arc=126 days, H=20.0 ~339m) from Frasso Sabino Obs. (Dec. 1.01-02p3)
K19P03Q 2019 PQ3 (arc=119 days, H=19.3 ~467m) from Steward Mt. Lemmon Sta. (Dec. 2.31-34p3 & 2.43p1)
K19P02R 2019 PR2 (Q=10.374 AU, arc=113 days, H=18.9 ~562m) from Frasso Sabino Obs. (Dec. 1.04-05p3)
K19K04G 2019 KG4 (Q=4.156 AU, arc=181 days, H=19.8 ~371m) from the Mt. Lemmon Survey (MLS) (Oct. 10.37-38p3, 23.44-45p3 & Nov. 24.32-34p4) and PS1 (Nov. 27.31-32p2)
K16X01T 2016 XT1 (arc=3 opp, H=19.7 ~389m) from CSS-Kuiper (Dec. 2.08p3 at G=21.7-22.5)
K15F35E 2015 FE35 (Q=4.584 AU, arc=4 opp, H=19.4 ~446m) from Steward Mt. Lemmon Sta. (Dec. 2.31p4)
K13F13Y 2013 FY13 (arc=3 opp, H=20.5 ~269m) from Steward Mt. Lemmon Sta. (Dec. 2.44-46p3)
K12U68S 2012 US68 (q=0.105 AU, Q=4.901 AU, arc=4 opp, H=18.3 ~741m) from CSS-Kuiper (Dec. 2.22-23p3 at G=22.3-4)
p1523 511523 2014 QS439 from ARO Westfield (Nov. 26.38-40p2 at V=22.2)
Q7940 267940 2004 EM20 from ARO Westfield (Nov. 26.42-43p3 at V=22.1-2)
P4419 254419 2004 VT60 from ARO Westfield (Nov. 24.23-24p6)
J2642 192642 1999 RD32 from ARO Westfield (Nov. 26.33-36p4 at V=21.8-22.3)
99248 99248 2001 KY66 from ATLAS Mauna Loa (Dec. 1.51-53p4)
88959 88959 2001 TZ44 from Oukaimeden Obs. (Dec. 1.81-83p4)
85236 85236 1993 KH from ATLAS Mauna Loa (Dec. 1.56-58p4)

MPEC 2019-X22 - "08:09 UT" - 2019 WB6

K19W06B 2019 WB6 (H=20.5 ~269m) was picked up at 1320 UT on 29 Nov. by PS1, observing it at Nov. 29.56-59p4 at w=21.62-22.23. This detection was confirmed by Pan-STARRS 2 (PS2) (Nov. 25.59-63p4 at G=22.1-7) and Holmes/CTIO (Nov. 30.29-30p2 at G=22.3-6 & Dec. 1.30-31p3 at G=21.6-9).

MPEC 2019-X21 - "08:04 UT" - 2000 LK10

K00L10K 2000 LK10 (H=19.5 ~426m) from PS1 (2012 Feb. 26.40-45p5 at G=22.6-23.6, 2012 March 28.33p1 at G=22.4, 2013 Dec. 22.49-50p2 at G=21.5-22.2, 2015 March 14.33-36p2 at G=23.0-5 & Nov. 26.34-38p3 at w=22.02-18) and CSS-Kuiper (Dec. 2.18p4 at G=21.5-22.2)

MPEC 2019-X20 - "07:17 UT" - 2019 WA6

K19W06A 2019 WA6 (small asteroid, H=25.8 ~23m) was picked up at 1231 UT on 27 Nov. by PS1, observing it at Nov. 26.52-53p2 and 27.52-56p4. This detection was confirmed by Calar Alto Schmidt (Nov. 28.96-99p5).

MPEC 2019-X19 - "07:15 UT" - 2019 WZ5

K19W05Z 2019 WZ5 (small asteroid, H=25.0 ~34m) was picked up at 0833 UT on 30 Nov. by PS1, observing it at Nov. 30.36-39p4. This detection was confirmed by Holmes/CTIO (Dec. 1.19-20p3), Great Shefford Obs. (Dec. 1.97-99p2), and Steward Mt. Lemmon Sta. (Dec. 2.18p3).

MPEC 2019-X18 - "07:13 UT" - 2019 WY5

K19W05Y 2019 WY5 (small asteroid, Earth MOID=3.3 LD, H=24.0 ~54m) was picked up at 0810 UT on 26 Nov. by PS1, observing it at Nov. 8.55-58p3 and 26.34-38p3. This detection was confirmed by R. Wainscoat on Mauna Kea (Nov. 28.44p3) and CSS-Kuiper (Dec. 2.19-20p4 at G=21.9-22.4).

MPEC 2019-X17 - "07:12 UT" - 2019 WX5

K19W05X 2019 WX5 (H=23.5 ~68m, NHATS) was picked up at 0731 UT on 27 Nov. by PS2, observing it at Nov. 27.31-33p3 at w=21.7-22.3. This detection was confirmed by PS1 (Oct. 28.42p1 at G=22.1, 28.49p1 at G=22.3, Nov. 2.41-45p2 at G=21.6-22.2, 7.54-58p4 at G=21.7-22.0 & 30.45-48p2 at G=22.1-2) and CSS-Kuiper (Dec. 2.15-16p4 at G=21.8-23.0).

MPEC 2019-X16 - "07:03 UT" - 2019 SJ11

K19S11J 2019 SJ11 (Q=5.192 AU, H=16.9 ~1.41 km) was picked up at 1405 UT on 26 Sept. by PS1, observing it at Sept. 26.59-62p4 and Oct. 6.60-63p4. This detection was confirmed by PS2 (2018 Sept. 19.51p1 at G=23.5, 2018 Oct. 3.40-43p4 at G=22.3-9, 2018 Oct. 15.39p1 at G=24.1, 2018 Nov. 7.26-31p3 at G=23.2-3, Oct. 24.54-58p3 at w=20.9-21.2, 31.45-47p3 at w=20.9 & Nov. 30.37-41p4 at w=20.66-81), MLS (Oct. 29.37-38p4), Holmes/CTIO (Dec. 1.12-13p3), and Steward Mt. Lemmon Sta. (Dec. 2.26-27p4).

MPEC 2019-X15 - "00:18 UT" - 2019 WO5

K19W05O 2019 WO5 (small asteroid, H=24.0 ~54m) was picked up at 0826 UT on 29 Nov. by PS1, observing it at Nov. 24.48-50p2 and 29.35-39p3. This detection was confirmed by PS2 (Nov. 27.42-44p2), Great Shefford Obs. (Nov. 29.82-83p2 & Dec. 1.84-89p3), and Holmes/CTIO (Nov. 30.16p3).

Observers on 2 December '19

A total of 23 observers appear in today's MPECs.

Code	Observer / observatory
`C97`	Al-Fulaij Obs., 2 in MPEC 2019-X23 -- 2019 WR3, 2019 WQ3
`E23`	Arcadia Obs. in New South Wales, 1 in MPEC 2019-X24 -- 2019 WC6
`H21`	Astronomical Research Obs. Westfield in Illinois, 11 in MPEC 2019-X23 -- 2019 UV11, 2019 UD4, 2019 SB10, 2019 RH1, 2019 RA2, 2019 QZ1, 2016 VO1, 511523, 267940, 254419, 192642
`T08`	ATLAS Mauna Loa in Hawaii, 2 in MPEC 2019-X23 -- 99248, 85236
`Z84`	Calar Alto Schmidt in Spain, 1 in MPEC 2019-X20 -- 2019 WA6
`V06`	Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) in Arizona, 9 in MPECs 2019-X17, 2019-X18, 2019-X21 & 2019-X23 -- 2019 WY5, 2019 WX5, 2019 WU2, 2019 WA3, 2019 SR3, 2016 XT1, 2016 VO1, 2012 US68, 2000 LK10
`807\|`	Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 10 in MPECs 2019-X15, 2019-X16, 2019-X19, 2019-X22 & 2019-X23 -- 2019 WZ5, 2019 WO5, 2019 WG4, 2019 WG2, 2019 WB6, 2019 UX13, 2019 UN14, 2019 UJ10, 2019 UA14, 2019 SJ11
`157`	Frasso Sabino Obs. in Italy, 2 in MPEC 2019-X23 -- 2019 QV5, 2019 PR2
`X31`	Galilei Obs., 1 in MPEC 2019-X24 -- 2019 WC6
`J95`	Great Shefford Obs. in England, 8 in MPECs 2019-X15, 2019-X19, 2019-X23 & 2019-X24 -- 2019 WZ5, 2019 WW, 2019 WP4, 2019 WO5, 2019 WM3, 2019 WH4, 2019 WH2, 2019 WC6
`K91`	LCO Sutherland A in South Africa, 1 in MPEC 2019-X23 -- 2019 WH2
`568^`	R. Wainscoat on Mauna Kea in Hawaii, 1 in MPEC 2019-X18 -- 2019 WY5
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 2 in MPECs 2019-X16 & 2019-X23 -- 2019 SJ11, 2019 KG4
`J69`	North Obs. in England, 2 in MPEC 2019-X23 -- 2019 WR3, 2019 WQ3
`J43`	Oukaimeden Obs. in Morocco, 1 in MPEC 2019-X23 -- 88959
`F51`	Pan-STARRS 1 (PS1) in Hawaii, 10 in MPECs 2019-X15, 2019-X16, 2019-X17, 2019-X18, 2019-X19, 2019-X20, 2019-X21, 2019-X22, 2019-X23 & 2019-X24 -- 2019 WZ5, 2019 WY5, 2019 WX5, 2019 WO5, 2019 WC6, 2019 WB6, 2019 WA6, 2019 SJ11, 2019 KG4, 2000 LK10
`F52`	Pan-STARRS 2 (PS2) in Hawaii, 4 in MPECs 2019-X15, 2019-X16, 2019-X17 & 2019-X22 -- 2019 WX5, 2019 WO5, 2019 WB6, 2019 SJ11
`6581`	Dave Balam via Plaskett 1.8m Telescope in British Columbia, 2 in MPEC 2019-X23 -- 2019 WV4, 2019 WT4
`C95`	SATINO-1 in France, 1 in MPEC 2019-X23 -- 2019 UJ2
`033`	Schwarzschild Obs. in Germany, 1 in MPEC 2019-X23 -- 2019 WT4
`I52`	Steward Obs. Mt. Lemmon Station in Arizona, 34 in MPECs 2019-X16, 2019-X19, 2019-X23 & 2019-X24 -- 2019 WZ5, 2019 WZ3, 2019 WY3, 2019 WY1, 2019 WX4, 2019 WW4, 2019 WW1, 2019 WV4, 2019 WV, 2019 WU4, 2019 WU3, 2019 WT4, 2019 WT, 2019 WS2, 2019 WP4, 2019 WO2, 2019 WM2, 2019 WL4, 2019 WL2, 2019 WG, 2019 WC6, 2019 WC4, 2019 WA2, 2019 VL4, 2019 UO13, 2019 UK13, 2019 UG9, 2019 UG7, 2019 UE5, 2019 SJ11, 2019 SC7, 2019 PQ3, 2015 FE35, 2013 FY13
`T12`	UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2019-X25 -- 2018 AL13
`L01`	Visnjan Obs., 1 in MPEC 2019-X24 -- 2019 WC6

For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring on 2 December '19

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS at 2358 UTC)
See the CRT page for a list of all objects rated recently as risks and our ephemerides page for a list of risk-listed objects under current observation.
The time horizon for JPL and NEODyS listings is 100 years, and both post impact solutions beyond that for some special objects.
For the latest official risk assessments, and for explanations of the terminology, see the NASA/JPL Sentry and NEODyS CLOMON2 risk pages.
0000NNN000 Object	Risk Monitor	When Noted UTC	0000T0000 Year Range	VI #	000NN00 Prob Cum	T0000 PS Cum	T0000 PS Max	T S	Notes for Today's Latest Risk Assessments

2019 WW4	NEODyS	1600	2036-2116	46	1.13e-06	-3.47	-3.99	0	NEODyS: "Based on 24 optical observations (of which 0 are rejected as outliers) from 2019-11-27.065 to 2019-12-02.101."
2019 WW4	JPL Sentry	1515	2033-2116	38	1.9046979e-06	-3.19	-3.85	0	JPL: Computed at 05:32 today Pacific time based on 24 observations spanning 5.0352 days (2019-Nov-27.06455 to 2019-Dec-02.09976). Diameter approximately 0.362 km. from weighted mean H=19.84.

2019 WH4	NEODyS	1600	R E M O V E D						-

2019 WA3	NEODyS	1533	2090-2116	5	5.77e-07	-6.89	-7.23	0	NEODyS: "Based on 14 optical observations (of which 1 are rejected as outliers) from 2019-11-25.363 to 2019-12-02.239."
2019 WA3	JPL Sentry	1515	2090-2116	4	5.5125e-07	-6.88	-7.22	0	JPL: Computed at 05:32 today Pacific time based on 14 observations spanning 6.8761 days (2019-Nov-25.361902 to 2019-Dec-02.238). Diameter approximately 0.027 km. from weighted mean H=25.50.

2019 WU2	NEODyS	1533	2086-2109	37	1.56e-05	-4.90	-5.11	0	NEODyS: "Based on 16 optical observations (of which 0 are rejected as outliers) from 2019-11-15.332 to 2019-12-02.260."
2019 WU2	JPL Sentry	1515	2087-2109	21	1.67024254e-05	-4.85	-5.05	0	JPL: Computed at 05:50 today Pacific time based on 16 observations spanning 16.927 days (2019-Nov-15.331591 to 2019-Dec-02.25881). Diameter approximately 0.040 km. from weighted mean H=24.65.

2019 WG2	NEODyS	1533	2093-2118	109	7.52e-05	-4.30	-4.98	0	NEODyS: "Based on 34 optical observations (of which 0 are rejected as outliers) from 2019-11-24.496 to 2019-12-01.241."
2019 WG2	JPL Sentry	1515	2098-2119	55	0.0002403280106	-3.75	-3.99	0	JPL: Computed at 05:37 today Pacific time based on 34 observations spanning 6.7448 days (2019-Nov-24.495057 to 2019-Dec-01.23983). Diameter approximately 0.034 km. from weighted mean H=24.99.

2019 WF1	NEODyS	1533	2090	1	3.85e-10	-6.89	-6.89	0	NEODyS: "Based on 29 optical observations (of which 1 are rejected as outliers) from 2019-11-17.210 to 2019-11-30.242."

Legend: VI# = VI count, Prob Cum = cumulative probability, PS Cum/Max = cumulative/maximum Palermo Scale, TS = Torino Scale (next 100 years)

An impact solution, also known as a "virtual impactor" (VI), is not a prediction but rather a possibility derived from a variant orbit calculation that cannot be eliminated yet based on the existing data. Elimination can come quickly with just a little further observation or may take weeks or months, sometimes years. Once superceded or eliminated, a former impact solution has zero relevance to an object's risk. See Jon Giorgini's "Understanding Risk Pages" to learn more.

Chronology on 2 December '19

Times are UTC for when items were noted or added by The Tracking News.

1910	Generated Traffic Report
1600	Noted that NEODyS has removed 2019 WH4 as an impact risk - see above Noted that NEODyS has updated its 2019 WW4 risk assessment - see above
1533	Noted that NEODyS has updated its 2019 WA3 risk assessment - see above Noted that NEODyS has posted 2019 WF1 as an impact risk - see above Noted that NEODyS has updated its 2019 WG2 risk assessment - see above Noted that NEODyS has updated its 2019 WU2 risk assessment - see above Grabbed MPEC 2019-X25 - 2018 AL13 - see above
1515	Noted that JPL Sentry has updated its 2019 WA3 risk assessment - see above Noted that JPL Sentry has updated its 2019 WG2 risk assessment - see above Noted that JPL Sentry has updated its 2019 WU2 risk assessment - see above Noted that JPL Sentry has updated its 2019 WW4 risk assessment - see above Grabbed MPEC 2019-X16 - 2019 SJ11 - see above Grabbed MPEC 2019-X17 - 2019 WX5 - see above Grabbed MPEC 2019-X18 - 2019 WY5 - see above Grabbed MPEC 2019-X19 - 2019 WZ5 - see above Grabbed MPEC 2019-X20 - 2019 WA6 - see above Grabbed MPEC 2019-X21 - 2000 LK10 - see above Grabbed MPEC 2019-X22 - 2019 WB6 - see above Grabbed MPEC 2019-X23 - Daily Orbit Update - see above Grabbed MPEC 2019-X24 - 2019 WC6 - see above
0415	Grabbed MPEC 2019-X15 - 2019 WO5 - see above

http://www.HohmannTransfer.com/mn/19/19336_1202.htm
Publisher information, privacy statement, and disclaimer.
This page is © Copyright 2019 Columbine of Maine - All Rights Reserved
Any mentioned trademarks are the property of their respective owners.
Various tabular formats and data used on this page are acknowledged as belonging to JPL, MPC, NEODyS, and/or others.
Do NOT copy, mirror, or embed this page, but you are welcome to link to it, and you may embed the RSS news feed. All information here is subject to very frequent change during the day of news compilation. Individuals may make copies for their own private, non-commercial use. Please report broken links or other problems with this page to <webmaster@hohmanntransfer.com>.