Contents  on 7 January '19

Asteroid/Comet Connection (A/CC) Resources:

The latest A/CC news is available via framed access, RSS news feed 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 7 January '19

Thirteen objects reported inside ten LD

Bulletin - 2218 UTC:  One new discovery of a close passer has been announced.

Earth passageI D~Size~Inside ten LDNotes
7.47 LD at 2256 UTC Jan. 192019 AB528 m Jan. 15 - 25MPEC


Thirteen transient natural objects are reported to be less than ten lunar distances (LD) from our planet today. Nearest are 2019 AD, inbound from about 5.2 to 4.2 LD*, and risk-listed 2019 AH3, which travels outward from 4.42 to 8.36 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
0.51 LD Dec. 28 2018 YO2 4 m  8.53 to 9.41 LD Dec. 16 - tomorrow intruder, NHATS target, risk
1.33 LD Jan. 5 2019 AH3 9 m  4.42 to 8.36 LD Jan. 3 - 8 risk
1.43 LD Jan. 4 2019 AB 19 m  5.74 to 7.88 LD Dec. 30 - tomorrow Moon buzzer, risk
2.03 LD Jan. 2 2019 AE3 12 m  7.98 to 9.81 LD Dec. 28 - tomorrow NHATS target
3.0   LD Jan. 10* 2019 AD 10 m  4.2 from 5.2 LD Jan. 2 - 18 EPU +/- 1.15 hours*, NHATS target
5.60 LD Jan. 12 2018 YU2 17 m  7.04 from 7.72 LD Jan. 4 - 20 NHATS target
7.47 LD Jan. 10 2018 YQ2 20 m  7.89 from 8.38 LD Jan. 4 - 15 NHATS target, risk - DOU
7.61 LD Jan. 13 2019 AR2 47 m  9.74 from 10.45 LD today - Jan. 19 NHATS target, enters ten LD
7.76 LD Jan. 10 2013 YM2 19 m  8.01 from 8.30 LD Jan. 3 - 16 NHATS target
7.77 LD Jan. 5 2019 AU 16 m  7.81 to 7.92 LD Dec. 27 - Jan. 14 NHATS target - DOU
7.8   LD yesterday* 2018 XO4 30 m  7.8 to 7.9 LD Dec. 30 - Jan. 13 EPU +/- 17 mins.*, NHATS target
9.05 LD Jan. 5 2018 YR2 17 m  9.30 to 9.63 LD Jan. 1 - 8 NHATS target
9.2   LD Jan. 4* 2019 AX3 10 m  9.3 to 9.5 LD Dec. 30 - Jan. 10 EPU +/- 19 mins.*, NHATS target
* EPU = Earth passage uncertainty

This report was generated at 1922 UTC with the discovery of outbound 2019 AX3 (MPEC ), announced late yesterday, and with follow-up in today's DOU MPEC for approaching risk-listed 2019 AK3, inbound risk-listed 2018 YQ2, outbound 2019 AU, departed 2018 YK2, and two departed risk-listed objects: 2019 AQ2 and 2018 XQ2.

Approaching
4.9   LD Jan. 12* 2019 AK3 13 m  12.3 from 14.6 LD Jan. 9 - 16 EPU +/- 9 mins.*, risk - DOU


<< Reading:  The discovery of 2019 AQ3 (MPECs: discovery, precovery) -- a large asteroid with a highly inclined orbit well inside Earth's orbit, has resulted in an interesting thread on the Minor Planet Mailing List.



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 7 January '19

The MPC's NEO Confirmation Page has 48 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 48 objects listed. Of these, 24 were "one nighters." So far The Tracking News has counted a total of 85 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 7 January '19

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been 21 MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2019-A117 - "21:59 UT" - 2019 AE5


MPEC 2019-A116 - "21:48 UT" - 2019 AD5


MPEC 2019-A115 - "21:42 UT" - 2019 AC5


MPEC 2019-A114 - "21:34 UT" - 2019 AB5


MPEC 2019-A113 - "17:40 UT" - 2003 YW1


MPEC 2019-A112 - "17:21 UT" - 2017 HR49


<< DOU on 7 Jan. '19 >>  MPEC 2019-A111 - "13:07 UT" - Daily Orbit Update


MPEC 2019-A110 - "12:24 UT" - 2019 AY4


MPEC 2019-A109 - "12:19 UT" - 2019 AX4


MPEC 2019-A108 - "12:15 UT" - 2019 AW4


MPEC 2019-A107 - "12:11 UT" - 2019 AV4


MPEC 2019-A106 - "12:06 UT" - 2019 AT4


MPEC 2019-A105 - "12:01 UT" - 2019 AS4


MPEC 2019-A104 - "11:56 UT" - 2019 AR4


MPEC 2019-A103 - "11:48 UT" - 2019 AQ4


MPEC 2019-A102 - "04:21 UT" - 2016 AO131


MPEC 2019-A101 - "01:50 UT" - Comet P/2019 A1 (Panstarrs)


MPEC 2019-A100 - "00:34 UT" - 2017 AM4


MPEC 2019-A99 - "00:30 UT" - 2014 XD8


MPEC 2019-A98 - "00:24 UT" - 2006 BO55


MPEC 2019-A97 - "00:17 UT" - 2019 AQ3

Observers  on 7 January '19

A total of 36 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 8 in MPECs 2019-A99, 2019-A100, 2019-A105, 2019-A106, 2019-A107, 2019-A108, 2019-A109 & 2019-A115 -- 2019 AX4, 2019 AW4, 2019 AV4, 2019 AT4, 2019 AS4, 2019 AC5, 2017 AM4, 2014 XD8
T05ATLAS Haleakala in Hawaii, 1 in MPEC 2019-A116 -- 2019 AD5
T08ATLAS Mauna Loa in Hawaii, 1 in MPEC 2019-A116 -- 2019 AD5
I47Auger Obs. in Argentina, 1 in MPEC 2019-A101 -- P/2019 A1
C77Bernezzo Obs. in Italy, 1 in MPEC 2019-A116 -- 2019 AD5
160Castelmartini Obs. in Italy, 13 in MPECs 2019-A111 & 2019-A116 -- 2019 AD5, 2018 XV, 2012 MM11, 2011 OL5, 2009 SV17, 2005 YY36, 2004 XP14, 2003 NW1, 523604, 523587, 457260, 163051, 141053
107Cavezzo Obs. in Italy, 1 in MPEC 2019-A111 -- 2004 XP14
K51Celado Obs. in Italy, 2 in MPECs 2019-A116 & 2019-A117 -- 2019 AE5, 2019 AD5
309&Marco Micheli via Cerro Paranal in Chile, 1 in MPEC 2019-A111 -- 2018 XQ2
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 2 in MPECs 2019-A108 & 2019-A115 -- 2019 AW4, 2019 AC5
Z99Clixby Obs. in England, 1 in MPEC 2019-A116 -- 2019 AD5
J04ESA Optical Ground Station in the Canary Islands, 1 in MPEC 2019-A111 -- 2018 XB4
734Farpoint Obs. in Kansas, 1 in MPEC 2019-A115 -- 2019 AC5
595Farra d'Isonzo Obs. in Italy, 2 in MPECs 2019-A111 & 2019-A116 -- 2019 AD5, 2004 XP14
203GiaGa Obs. in Italy, 1 in MPEC 2019-A116 -- 2019 AD5
Q621Hidetaka Sato in Japan via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2019-A111 -- 2018 LW5
P93JAXA Space Tracking & Communications Center (JAXA STCC) in Japan, 2 in MPECs 2019-A107 & 2019-A116 -- 2019 AV4, 2019 AD5
Z43Landehen Obs., 4 in MPEC 2019-A111 -- 2018 YK2, 2018 XV, 2018 XR, 2018 VB9
K38M57 Obs. in Italy, 3 in MPECs 2019-A111 & 2019-A116 -- 2019 AD5, 2004 XP14, 2003 NW1
568^R. Wainscoat on Mauna Kea in Hawaii, 5 in MPECs 2019-A101, 2019-A103, 2019-A104, 2019-A106 & 2019-A115 -- 2019 AT4, 2019 AR4, 2019 AQ4, 2019 AC5, P/2019 A1
474Mt. John Obs. in New Zealand, 6 in MPECs 2019-A110, 2019-A111 & 2019-A115 -- 2019 AY4, 2019 AU, 2019 AQ, 2019 AO, 2019 AC5, 2018 CB15
G96Mt. Lemmon Survey (MLS) in Arizona, 3 in MPECs 2019-A101, 2019-A105 & 2019-A107 -- 2019 AV4, 2019 AS4, P/2019 A1
F51Pan-STARRS 1 (PS1) in Hawaii, 16 in MPECs 2019-A97, 2019-A98, 2019-A101, 2019-A102, 2019-A103, 2019-A104, 2019-A106, 2019-A108, 2019-A109, 2019-A110, 2019-A111, 2019-A113, 2019-A114, 2019-A115 & 2019-A117 -- 2019 AY4, 2019 AX4, 2019 AW4, 2019 AT4, 2019 AR4, 2019 AQ4, 2019 AQ3, 2019 AE5, 2019 AC5, 2019 AB5, P/2019 A1, 2016 AO131, 2007 YU56, 2006 BO55, 2004 XP14, 2003 YW1
K63Pascoli Obs. in Italy, 2 in MPECs 2019-A111 & 2019-A116 -- 2019 AD5, 2004 XP14
B49Paus Obs. in Spain, 1 in MPEC 2019-A116 -- 2019 AD5
L04ROASTERR-1 in Romania, 1 in MPEC 2019-A116 -- 2019 AD5
104San Marcello Pistoiese Obs. in Italy, 4 in MPECs 2019-A107, 2019-A109, 2019-A111 & 2019-A116 -- 2019 AX4, 2019 AV4, 2019 AD5, 2004 XP14
C95SATINO-1 in France, 1 in MPEC 2019-A111 -- 21088
204Schiaparelli Obs. in Italy, 2 in MPECs 2019-A116 & 2019-A117 -- 2019 AE5, 2019 AD5
587Sormano Obs. in Italy, 3 in MPECs 2019-A107, 2019-A111 & 2019-A116 -- 2019 AV4, 2019 AD5, 2004 XP14
291Spacewatch 1.8m telescope in Arizona, 15 in MPEC 2019-A111 -- 2019 AV2, 2019 AV, 2019 AQ2, 2019 AQ, 2019 AP3, 2019 AP, 2019 AK3, 2019 AC3, 2018 YW2, 2018 YW, 2018 YT, 2018 YQ2, 2018 XG5, 2018 XB4, 2013 BC70
W34Squirrel Valley Obs. in North Carolina, 1 in MPEC 2019-A116 -- 2019 AD5
I52Steward Obs. Mt. Lemmon Station in Arizona, 2 in MPECs 2019-A105 & 2019-A107 -- 2019 AV4, 2019 AS4
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 6 in MPECs 2019-A111 & 2019-A112 -- 2018 YH, 2018 QT, 2017 HR49, 2017 AM4, 2016 BX14, 2007 AA9
L01Visnjan Obs., 11 in MPECs 2019-A101, 2019-A102, 2019-A104, 2019-A105, 2019-A107, 2019-A109, 2019-A110, 2019-A111, 2019-A114, 2019-A116 & 2019-A117 -- 2019 AY4, 2019 AX4, 2019 AV4, 2019 AS4, 2019 AR4, 2019 AE5, 2019 AD5, 2019 AB5, P/2019 A1, 2016 AO131, 2004 XP14
J08Zonalunar Obs. in Spain, 1 in MPEC 2019-A116 -- 2019 AD5
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 7 January '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 AP3JPL Sentry1730R E M O V E DJPL: Risk listing removed at 1545 UTC today
2019 AK3JPL Sentry17302042-205861.63169172e-05-5.76-5.920JPL: Computed at 07:30 today Pacific time based on 14 observations spanning 2.9881 days (2019-Jan-04.47409 to 2019-Jan-07.46222). Diameter approximately 0.012 km. from weighted mean H=27.20.
NEODyS17302046-205854.06e-06-6.34-6.590NEODyS: "Based on 14 optical observations (of which 0 are rejected as outliers) from 2019-01-04.475 to 2019-01-07.463."
2019 AC3JPL Sentry17302084-2118400.000198179698-5.17-5.250JPL: Computed at 07:37 today Pacific time based on 12 observations spanning 3.7463 days (2019-Jan-03.58822 to 2019-Jan-07.33453). Diameter approximately 0.012 km. from weighted mean H=27.24.
NEODyS17302088-2118258.34e-05-5.58-5.83-NEODyS: "Based on 12 optical observations (of which 0 are rejected as outliers) from 2019-01-03.589 to 2019-01-07.335."
2019 AV2JPL Sentry1730R E M O V E DJPL: Risk listing removed at 1550 UTC today
NEODyS1730R E M O V E D-
2019 AQ2JPL Sentry17302073-2117481.5353416e-05-5.45-5.850JPL: Computed at 08:02 today Pacific time based on 26 observations spanning 4.0331 days (2019-Jan-03.32957 to 2019-Jan-07.3627). Diameter approximately 0.026 km. from weighted mean H=25.56.
NEODyS17302073-2117563.37e-06-6.17-6.710NEODyS: "Based on 26 optical observations (of which 0 are rejected as outliers) from 2019-01-03.330 to 2019-01-07.364."
2018 YW2JPL Sentry17302050-208132.5799e-06-5.17-5.470JPL: Computed at 07:29 today Pacific time based on 30 observations spanning 6.9192 days (2018-Dec-31.52399 to 2019-Jan-07.44319). Diameter approximately 0.055 km. from weighted mean H=23.96.
NEODyS17302050-208149.38e-07-5.60-5.90NEODyS: "Based on 30 optical observations (of which 0 are rejected as outliers) from 2018-12-31.525 to 2019-01-07.444."
2018 YQ2JPL Sentry17302077-211226.348e-08-8.07-8.350JPL: Computed at 07:36 today Pacific time based on 34 observations spanning 7.1130 days (2018-Dec-31.16339 to 2019-Jan-07.27641). Diameter approximately 0.021 km. from weighted mean H=26.08.
2018 XG5JPL Sentry17302083-208326.24194e-07-4.01-4.010JPL: Computed at 07:50 today Pacific time based on 42 observations spanning 24.898 days (2018-Dec-13.39431 to 2019-Jan-07.29201). Diameter approximately 0.300 km. from weighted mean H=20.29.
NEODyS1730208312.2e-07-4.47-4.470NEODyS: "Based on 42 optical observations (of which 0 are rejected as outliers) from 2018-12-13.395 to 2019-01-07.293."
2018 XB4JPL Sentry17302052-2118397.58498179e-05-3.93-4.060JPL: Computed at 07:38 today Pacific time based on 45 observations spanning 24.910 days (2018-Dec-13.34358 to 2019-Jan-07.25341). Diameter approximately 0.054 km. from weighted mean H=23.98.
NEODyS17302052-2118717.64e-05-3.94-4.07-NEODyS: "Based on 45 optical observations (of which 0 are rejected as outliers) from 2018-12-13.344 to 2019-01-07.254."
2018 XQ2JPL Sentry17302068-2118570.000750996192-5.02-5.500JPL: Computed at 07:46 today Pacific time based on 39 observations spanning 27.825 days (2018-Dec-10.2423 to 2019-Jan-07.067641). Diameter approximately 0.008 km. from weighted mean H=28.10.
NEODyS17302064-21171481.09e-03-4.86-5.430NEODyS: "Based on 39 optical observations (of which 0 are rejected as outliers) from 2018-12-10.243 to 2019-01-07.068."
2010 JA43JPL Sentry17302022-21181008.11495e-08-4.97-5.600JPL: Computed at 15:22 Oct. 3rd of 2018 Pacific time based on 21 observations spanning 2.7122 days (2010-May-04.53905 to 2010-May-07.251222). Diameter approximately 0.162 km. from weighted mean H=21.60.
2005 NX55JPL Sentry17302021-21071054.31772e-08-5.00-5.650JPL: Computed at 13:16 April 9th of 2017 Pacific time based on 14 observations spanning 1.1343 days (2005-Jul-11.16281 to 2005-Jul-12.297115). Diameter approximately 0.141 km. from weighted mean H=21.87.

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 7 January '19

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

2331Grabbed MPEC 2019-A117 - 2019 AE5 - see above
2150Grabbed MPEC 2019-A114 - 2019 AB5 - see above
Grabbed MPEC 2019-A115 - 2019 AC5 - see above
Grabbed MPEC 2019-A116 - 2019 AD5 - see above
1922Generated Traffic Report
1804Grabbed MPEC 2019-A113 - 2003 YW1 - see above
1730Noted that JPL Sentry has updated its 2005 NX55 risk assessment - see above
Noted that JPL Sentry has updated its 2010 JA43 risk assessment - see above
Noted that JPL Sentry has updated its 2018 XB4 risk assessment - see above
Noted that NEODyS has updated its 2018 XB4 risk assessment - see above
Noted that JPL Sentry has updated its 2018 XG5 risk assessment - see above
Noted that NEODyS has updated its 2018 XG5 risk assessment - see above
Noted that JPL Sentry has updated its 2018 XQ2 risk assessment - see above
Noted that NEODyS has updated its 2018 XQ2 risk assessment - see above
Noted that JPL Sentry has updated its 2018 YQ2 risk assessment - see above
Noted that JPL Sentry has updated its 2018 YW2 risk assessment - see above
Noted that NEODyS has updated its 2018 YW2 risk assessment - see above
Noted that JPL Sentry has updated its 2019 AC3 risk assessment - see above
Noted that NEODyS has updated its 2019 AC3 risk assessment - see above
Noted that JPL Sentry has updated its 2019 AK3 risk assessment - see above
Noted that NEODyS has updated its 2019 AK3 risk assessment - see above
Noted that JPL Sentry has removed 2019 AP3 as an impact risk - see above
Noted that JPL Sentry has updated its 2019 AQ2 risk assessment - see above
Noted that NEODyS has updated its 2019 AQ2 risk assessment - see above
Noted that JPL Sentry has removed 2019 AV2 as an impact risk - see above
Noted that NEODyS has removed 2019 AV2 as an impact risk - see above
Grabbed MPEC 2019-A103 - 2019 AQ4 - see above
Grabbed MPEC 2019-A104 - 2019 AR4 - see above
Grabbed MPEC 2019-A105 - 2019 AS4 - see above
Grabbed MPEC 2019-A106 - 2019 AT4 - see above
Grabbed MPEC 2019-A107 - 2019 AV4 - see above
Grabbed MPEC 2019-A108 - 2019 AW4 - see above
Grabbed MPEC 2019-A109 - 2019 AX4 - see above
Grabbed MPEC 2019-A110 - 2019 AY4 - see above
Grabbed MPEC 2019-A111 - Daily Orbit Update - see above
Grabbed MPEC 2019-A112 - 2017 HR49 - see above
0507Grabbed MPEC 2019-A101 - Comet P/2019 A1 (Panstarrs) - see above
Grabbed MPEC 2019-A102 - 2016 AO131 - see above
0102Grabbed MPEC 2019-A98 - 2006 BO55 - see above
Grabbed MPEC 2019-A99 - 2014 XD8 - see above
Grabbed MPEC 2019-A100 - 2017 AM4 - see above
0022Grabbed MPEC 2019-A97 - 2019 AQ3 - see above