Contents  on 28 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 28 January '19

Fourteen objects reported inside ten LD

There are fourteen visitors reported inside ten lunar distances (LD) of Earth today. Within our planet's sphere of gravitational influence, 2019 BR2 comes its closest on this passage, reaching 1.71 LD, and its closest to the Moon -- 1.10 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
1.71 LD today 2019 BR2 8 m  1.71 LD Jan. 24 - 31 Earth closest at 0526 UTC, Moon closest 1.10 LD at 0705 UTC - DOU
2.44 LD Jan. 23 2019 BZ 11 m  8.79 to 10.70 LD Jan. 18 - 28 NHATS target, exits ten LD, risk - DOU
2.84 LD Jan. 25 2019 BK2 15 m  9.75 to 12.94 LD Jan. 22 - 28 exits ten LD
2.99 LD Jan. 25 2019 BM2 20 m  7.53 to 9.93 LD Jan. 21 - 29 DOU
3.28 LD yesterday 2019 BQ2 14 m  3.33 to 4.83 LD Jan. 24 - 30 DOU
3.36 LD tomorrow 2019 BG3 21 m  3.40 from 7.61 LD yesterday - Jan. 30 NEW - MPEC
3.42 LD Jan. 30 2019 BJ1 38 m  7.51 from 10.99 LD today - Feb. 2 enters ten LD
4.76 LD yesterday 2019 BS2 12 m  4.77 to 5.40 LD Jan. 24 - 31
5.75 LD Jan. 26 2019 AA10 24 m  7.09 to 8.65 LD Jan. 22 - 29
6.96 LD Jan. 23 2019 AS11 15 m  8.45 to 9.02 LD Jan. 15 - 30 NHATS target
7.3   LD Jan. 26* 2019 AQ14 13 m  7.9 to 8.9 LD Jan. 23 - 29 EPU +/- 1.97 hours*, NHATS target
7.6   LD Jan. 25* 2019 AJ13 8 m  8.6 to 9.3 LD Jan. 20 - 29 EPU +/- 5 mins.*, NHATS target
8.59 LD Jan. 25 2019 AG11 19 m  9.56 to 10.40 LD Jan. 22 - 28 exits ten LD
9.11 LD today 2019 BV2 29 m  9.11 LD yesterday - Jan. 30 NEW, Earth closest at 2104 UTC, risk - MPEC, DOU
* EPU = Earth passage uncertainty

This report was generated at 2020 UTC with two discoveries from late yesterday and two announced today: inbound 2019 BG3 (MPEC), passing 2019 BV2 (risk listed MPEC, DOU), and already departed objects 2019 BU2 (risk, MPEC, DOU), which went by us at 9.22 LD on January 23rd, and 2019 BB3 (MPEC), which flew by at about 3.2 LD* on the 21st. Today's DOU MPEC has follow-up for ten close-passing objects: passing 2019 BR2, outbound objects 2019 BQ2, 2019 BM2, and risk-listed 2019 BZ, and departed objects 2019 BO2, 2019 BU1, 2019 BE1, 2019 AT13, 2019 AR2, and risk-listed intruder 2019 BO.

Approaching
7.3   LD Feb. 12* 2017 PV25 41 m  21.6 from 23.0 LD Feb. 7 - 17 EPU +/- 1.07 hours*, NHATS target



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 28 January '19

The MPC's NEO Confirmation Page has 80 listings

When last checked at 2330 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 80 objects listed. Of these, 47 were "one nighters." So far The Tracking News has counted a total of 93 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 28 January '19

Minor Planet Electronic Circulars

As of last check at 2330 UTC, there have been ten MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2019-B129 - "18:17 UT" - 2019 BH3


MPEC 2019-B128 - "18:13 UT" - 2019 BG3


MPEC 2019-B127 - "18:08 UT" - 2019 BF3


MPEC 2019-B126 - "18:04 UT" - 2019 BE3


MPEC 2019-B125 - "18:00 UT" - 2019 BD3


MPEC 2019-B124 - "17:56 UT" - 2019 BC3


MPEC 2019-B123 - "17:52 UT" - 2019 BB3


MPEC 2019-B122 - "17:47 UT" - 2019 BA3


<< DOU on 28 Jan. '19 >>  MPEC 2019-B121 - "13:12 UT" - Daily Orbit Update


MPEC 2019-B120 - "04:18 UT" - 2018 ST3

Observers  on 28 January '19

A total of 29 observers appear in today's MPECs.

CodeObserver / observatory
T05ATLAS Haleakala in Hawaii, 6 in MPEC 2019-B121 -- 2019 BE1, 2019 AV2, 2019 AR3, 2019 AP3, 2018 XV, 2007 YU56
T08ATLAS Mauna Loa in Hawaii, 5 in MPEC 2019-B121 -- 2019 AR2, 2016 AZ8, 2012 BC124, 419880, 2340
V03Big Water Obs. in Utah, 1 in MPEC 2019-B128 -- 2019 BG3
160Castelmartini Obs. in Italy, 12 in MPEC 2019-B121 -- 2019 AV2, 2018 VB9, 90403, 86324, 523604, 512245, 454177, 325395, 163051, 4401, 1943, 433
703Catalina Sky Survey (CSS) in Arizona, 4 in MPECs 2019-B120, 2019-B124, 2019-B127 & 2019-B128 -- 2019 BG3, 2019 BF3, 2019 BC3, 2018 ST3
107Cavezzo Obs. in Italy, 1 in MPEC 2019-B121 -- 512245
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 3 in MPEC 2019-B121 -- 2019 BM2, 2019 AM2, 2018 VP3
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2019-B127 -- 2019 BF3
E89Geyserland Obs. in New Zealand, 3 in MPEC 2019-B121 -- 96536, 454177, 21277
J95Great Shefford Obs. in England, 12 in MPECs 2019-B121, 2019-B122, 2019-B124, 2019-B125, 2019-B126, 2019-B127, 2019-B128 & 2019-B129 -- 2019 BZ, 2019 BR2, 2019 BQ2, 2019 BH3, 2019 BG3, 2019 BF3, 2019 BE3, 2019 BD3, 2019 BC3, 2019 BA3, 2015 YE21, 2006 CU
P93JAXA Space Tracking & Communications Center in Japan, 1 in MPEC 2019-B127 -- 2019 BF3
H01Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2019-B122 -- 2019 BA3
G96Mt. Lemmon Survey (MLS) in Arizona, 11 in MPECs 2019-B120, 2019-B121, 2019-B122, 2019-B123, 2019-B125, 2019-B126, 2019-B127, 2019-B128 & 2019-B129 -- 2019 BU2, 2019 BH3, 2019 BG3, 2019 BF3, 2019 BE3, 2019 BD3, 2019 BB3, 2019 BA3, 2018 WK2, 2018 ST3, 518735
K74Muensterschwarzach Obs. in Germany, 1 in MPEC 2019-B121 -- 42286
644NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2019-B120 -- 2018 ST3
J69North Obs. in England, 1 in MPEC 2019-B121 -- 2019 BG1
I41Palomar Transient Factory (PTF) in southern California, 9 in MPECs 2019-B120 & 2019-B121 -- 2018 ST3, 2016 AZ8, 2013 VD13, 68950, 523595, 418900, 308127, 186822, 6178
F51Pan-STARRS 1 (PS1) in Hawaii, 13 in MPECs 2019-B121, 2019-B124 & 2019-B127 -- 2019 BK, 2019 BF3, 2019 BC3, 2019 AU3, 2018 YA3, 2018 XV, 2018 XU6, 2018 XQ4, 2015 YE21, 2006 CU, 2004 XP14, 453778, 228502
F52Pan-STARRS 2 (PS2) in Hawaii, 3 in MPECs 2019-B121 & 2019-B129 -- 2019 BU2, 2019 BH3, 2014 DM22
104San Marcello Pistoiese Obs. in Italy, 2 in MPECs 2019-B121 & 2019-B125 -- 2019 BD3, 2012 BC124
C95SATINO-1 in France, 1 in MPEC 2019-B121 -- 162004
W88!program code "!" (10) via Slooh.com Chile Obs. in Chile, 1 in MPEC 2019-B121 -- 504074
W881Tony Evans in Portugal via Slooh.com Chile Obs. in Chile, 1 in MPEC 2019-B121 -- 512244
587Sormano Obs. in Italy, 2 in MPEC 2019-B121 -- 2019 BH1, 2019 BG1
691Spacewatch 0.9m telescope in Arizona, 3 in MPEC 2019-B121 -- 2019 AF3, 2018 VN3, 2018 RX
291Spacewatch 1.8m telescope in Arizona, 15 in MPECs 2019-B120 & 2019-B121 -- 2019 BV2, 2019 BU1, 2019 BO, 2019 AT13, 2019 AS7, 2019 AP8, 2019 AH13, 2019 AG12, 2018 XV5, 2018 XG5, 2018 WM, 2018 TD4, 2018 ST3, 2017 BP5, 2006 TB
I52Steward Obs. Mt. Lemmon Station in Arizona, 19 in MPECs 2019-B121, 2019-B122, 2019-B123, 2019-B124, 2019-B125, 2019-B126, 2019-B127, 2019-B128 & 2019-B129 -- 2019 BT1, 2019 BR1, 2019 BQ1, 2019 BO2, 2019 BH3, 2019 BH1, 2019 BG3, 2019 BG2, 2019 BF3, 2019 BF2, 2019 BE3, 2019 BD3, 2019 BC3, 2019 BB3, 2019 BA3, 2019 AR5, 2019 AQ13, 2019 AA9, 2018 VF1
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 5 in MPEC 2019-B121 -- 2019 AX8, 2019 AN5, 2018 YH, 2018 RJ7, 2003 FF5
L01Visnjan Obs., 3 in MPECs 2019-B122, 2019-B124 & 2019-B125 -- 2019 BD3, 2019 BC3, 2019 BA3
718Wiggins Obs. in Utah, 1 in MPEC 2019-B121 -- 2019 AV2
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 28 January '19

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2330 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 BV2JPL Sentry17052073-211481.12566e-06-6.24-6.510JPL #2 for the day: Computed at 09:01 today Pacific time based on 36 observations spanning 2.0081 days (2019-Jan-26.08344 to 2019-Jan-28.0915). Diameter approximately 0.029 km. from weighted mean H=25.34.
NEODyS16402044-211188.03e-08-7.43-7.940NEODyS: "Based on 36 optical observations (of which 1 are rejected as outliers) from 2019-01-26.084 to 2019-01-28.092."
2019 BU1JPL Sentry17052062-206221.3056032e-06-6.28-6.280JPL: Computed at 08:52 today Pacific time based on 47 observations spanning 3.1852 days (2019-Jan-25.32671 to 2019-Jan-28.5119). Diameter approximately 0.020 km. from weighted mean H=26.12.
NEODyS16402056-206229.17e-07-6.44-6.480NEODyS: "Based on 47 optical observations (of which 1 are rejected as outliers) from 2019-01-25.328 to 2019-01-28.513."
2019 BZJPL Sentry17052077-2119312.3546143e-05-6.07-6.320JPL: Computed at 08:52 today Pacific time based on 25 observations spanning 2.0670 days (2019-Jan-24.180448 to 2019-Jan-26.24741). Diameter approximately 0.011 km. from weighted mean H=27.53.
NEODyS16402067-2118381.88e-05-6.18-6.53-NEODyS: "Based on 25 optical observations (of which 3 are rejected as outliers) from 2019-01-24.181 to 2019-01-26.248."
2019 BOJPL Sentry17052055-2095159.47657e-06-6.68-7.310JPL: Computed at 08:44 today Pacific time based on 17 observations spanning 11.147 days (2019-Jan-17.25468 to 2019-Jan-28.40122). Diameter approximately 0.008 km. from weighted mean H=28.08.
NEODyS16402044-2100291.02e-05-6.68-7.260NEODyS: "Based on 17 optical observations (of which 0 are rejected as outliers) from 2019-01-17.255 to 2019-01-28.402."
2019 AF14JPL Sentry16402019-201914.742e-09-4.59-4.590JPL: Computed at 10:32 Jan. 26th Pacific time based on 6 observations spanning .89119 days (2019-Jan-09.48216 to 2019-Jan-10.373355). Diameter approximately 0.150 km. from weighted mean H=21.76.
2019 AG12JPL Sentry1640R E M O V E DJPL: Risk listing removed at 1638 UTC today
2018 XB4NEODyS16402052-2118481.43e-04-3.69-3.71-NEODyS: "Based on 63 optical observations (of which 0 are rejected as outliers) from 2018-12-13.344 to 2019-01-24.128."

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 28 January '19

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

2020Generated Traffic Report
1832Grabbed MPEC 2019-B122 - 2019 BA3 - see above
Grabbed MPEC 2019-B123 - 2019 BB3 - see above
Grabbed MPEC 2019-B124 - 2019 BC3 - see above
Grabbed MPEC 2019-B125 - 2019 BD3 - see above
Grabbed MPEC 2019-B126 - 2019 BE3 - see above
Grabbed MPEC 2019-B127 - 2019 BF3 - see above
Grabbed MPEC 2019-B128 - 2019 BG3 - see above
Grabbed MPEC 2019-B129 - 2019 BH3 - see above
1705Noted that JPL Sentry has updated its 2019 BO risk assessment - see above
Noted that JPL Sentry has updated its 2019 BU1 risk assessment - see above
Noted that JPL Sentry has updated its 2019 BV2 risk assessment - see above
Noted that JPL Sentry has updated its 2019 BZ risk assessment - see above
1640Noted that NEODyS has updated its 2018 XB4 risk assessment - see above
Noted that JPL Sentry has posted 2019 AF14 as an impact risk - see above
Noted that JPL Sentry has removed 2019 AG12 as an impact risk - see above
Noted that NEODyS has updated its 2019 BO risk assessment - see above
Noted that NEODyS has updated its 2019 BU1 risk assessment - see above
Noted that NEODyS has posted 2019 BV2 as an impact risk - see above
Noted that NEODyS has updated its 2019 BZ risk assessment - see above
Grabbed MPEC 2019-B121 - Daily Orbit Update - see above
0430Grabbed MPEC 2019-B120 - 2018 ST3 - see above
0024Noted that JPL Sentry has posted 2019 BV2 as an impact risk - see above