Contents  on 31 January '20

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 31 January '20

Thirteen objects reported inside ten LD

Thirteen asteroids are reported flying within ten lunar distances (LD) of our planet today. All of them are now and will remain outside three LD on their current passages.

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 Jan. 27 2020 BA13 6 m  7.54 to 9.82 LD Jan. 23 - Feb. 1 intruder, risk
1.51 LD Jan. 28 2020 BK13 7 m  6.56 to 8.73 LD Jan. 23 - Feb. 1 NEW, NHATS target - MPEC
2.00 LD Jan. 21 2020 BB 7 m  7.79 to 8.57 LD Jan. 9 - Feb. 2 NHATS target, risk
2.15 LD Jan. 28 2020 BG13 9 m  5.23 to 7.01 LD Jan. 23 - Feb. 2 NEW - MPEC
3.43 LD Feb. 1 2020 BN12 23 m  3.60 from 4.33 LD Jan. 26 - Feb. 7 NHATS target - DOU
3.69 LD Feb. 4 2013 BA74 27 m  6.40 from 7.82 LD Jan. 29 - Feb. 9
4.50 LD yesterday 2020 BL11 10 m  4.53 to 4.65 LD Jan. 17 - Feb. 11 NHATS target
4.78 LD Jan. 29 2020 BL13 17 m  5.32 to 5.97 LD Jan. 21 - Feb. 5 NEW, NHATS target - MPEC
5.09 LD Jan. 26 2020 BH3 21 m  8.59 to 9.87 LD Jan. 20 - Feb. 1 NHATS target, risk
5.65 LD today 2020 BZ4 9 m  5.65 LD Jan. 27 - Feb. 4 NHATS target, Earth closest at 1647 UTC
5.89 LD yesterday 2020 BV7 9 m  5.94 to 6.44 LD Jan. 26 - Feb. 3 NHATS target
6.58 LD Feb. 8 2020 BL8 24 m  8.34 from 8.79 LD Jan. 28 - Feb. 18 NHATS target - DOU
9.62 LD today 2020 BR8 26 m  9.62 LD yesterday - today Earth closest at 0111 UTC

This report was generated at 2010 UTC with six new discoveries: approaching risk-listed 2020 BW13 (MPEC), three outbound objects: 2020 BL13 (MPEC), 2020 BK13 (MPEC), and 2020 BG13 (MPEC), and two already departed: 2020 BM13 (MPEC), which went by at about 6.8 LD on January 22nd (uncertainty +/- 1.35 hours), and 2020 BJ13 (MPEC), which slipped past at about 5.6 LD the same day (uncertainty +/- 19 minutes). Today's DOU MPEC has follow-up for approaching objects 2020 BK10 and risk-listed 2020 BW5, inbound 2020 BN12 and 2020 BL8, and six departed close-passers: 2020 BW10, 2020 BW8, 2020 BS, 2020 BD, and including risk-listed 2020 BP12 and 2020 AY1.

Approaching - sorted by 10-LD bubble entry date
Earth passage I D ~Size Distance today  Inside ten LD Notes
2.8   LD Feb. 6* 2020 BF10 12 m  11.3 from 13.2 LD Feb. 1 - 11 EPU +/- 8 mins.*, NHATS target
5.15 LD Feb. 9 2020 BW5 17 m  18.77 from 20.77 LD Feb. 5 - 14 NHATS target, risk - DOU
1.9   LD Feb. 10* 2020 BK10 19 m  23.4 from 26.0 LD Feb. 6 - 13 EPU +/- 40 mins.* - DOU
9.1   LD Feb. 24* 2020 BW13 13 m  17.2 from 17.8 LD Feb. 17 - March 3 NEW, EPU +/- 32 mins.*, risk - MPEC
* EPU = Earth passage uncertainty



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. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.

NEOCP Activity  on 31 January '20

The MPC's NEO Confirmation Page has 94 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 94 objects listed. Of these, 44 were "one nighters." So far The Tracking News has counted a total of 129 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 31 January '20

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been 23 MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2020-B313 - "21:28 UT" - 2020 BZ13


MPEC 2020-B312 - "18:42 UT" - 2017 DU15


MPEC 2020-B311 - "16:31 UT" - 2020 BA14


MPEC 2020-B310 - "15:02 UT" - 2016 CW137


MPEC 2020-B309 - "14:47 UT" - 2018 MF13


MPEC 2020-B308 - "14:36 UT" - 2020 BY13


<< DOU on 31 January '20 >>  MPEC 2020-B307 - "12:36 UT" - Daily Orbit Update


MPEC 2020-B306 - "11:43 UT" - 2020 BX13


MPEC 2020-B305 - "11:39 UT" - 2020 BW13


MPEC 2020-B304 - "01:25 UT" - 2020 BV13


MPEC 2020-B303 - "01:11 UT" - 2020 BU13


MPEC 2020-B302 - "00:55 UT" - 2020 BT13


MPEC 2020-B301 - "00:48 UT" - 2020 BR13


MPEC 2020-B300 - "00:46 UT" - 2020 BQ13


MPEC 2020-B299 - "00:45 UT" - 2020 BP13


MPEC 2020-B298 - "00:44 UT" - 2020 BO13


MPEC 2020-B297 - "00:15 UT" - 2020 BN13


MPEC 2020-B296 - "00:14 UT" - 2020 BM13


MPEC 2020-B295 - "00:09 UT" - 2020 BL13


MPEC 2020-B294 - "00:07 UT" - 2020 BK13


MPEC 2020-B293 - "00:04 UT" - 2020 BJ13


MPEC 2020-B292 - "00:03 UT" - 2020 BH13


MPEC 2020-B291 - "00:00 UT" - 2020 BG13

Observers  on 31 January '20

A total of 37 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 2 in MPECs 2020-B298 & 2020-B303 -- 2020 BU13, 2020 BO13
T05ATLAS Haleakala in Hawaii, 20 in MPEC 2020-B307 -- 2011 CT4, 90075, 86450, 54686, 54071, 512245, 492143, 458732, 455322, 35107, 338347, 203015, 159454, 137925, 137170, 10115, 7088, 5626, 4055, 1627
T08ATLAS Mauna Loa in Hawaii, 31 in MPECs 2020-B295 & 2020-B307 -- 2020 BW10, 2020 BP12, 2020 BN12, 2020 BL13, 2020 BE9, 2019 XG1, 2017 AE5, 2015 DE200, 2012 BE124, 2009 AH16, 2004 MD, 2002 EY2, 1996 AE2, 89830, 52768, 483878, 416591, 416231, 248926, 237805, 214088, 18172, 163696, 137199, 137099, 136993, 136795, 103067, 6455, 1981, 1866
Z84Calar Alto Schmidt in Spain, 1 in MPEC 2020-B313 -- 2020 BZ13
703Catalina Sky Survey (CSS) in Arizona, 39 in MPECs 2020-B291 & 2020-B307 -- 2020 BL8, 2020 BG13, 2020 BE2, 2020 BD9, 2020 AZ2, 2019 WB6, 2016 AX147, 2008 OX1, 2007 BJ29, 2004 CH52, 90075, 54686, 512245, 506459, 500094, 488490, 474223, 458732, 374188, 35107, 338347, 311044, 310442, 203015, 183548, 162038, 159928, 153842, 137925, 137120, 136582, 11405, 11066, 106589, 106538, 10115, 7088, 5693, 2059
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 6 in MPECs 2020-B297, 2020-B299, 2020-B305, 2020-B307 & 2020-B308 -- 2020 BY13, 2020 BW13, 2020 BQ7, 2020 BP13, 2020 BN13, 2020 BF4
W84DECam in Chile, 1 in MPEC 2020-B309 -- 2018 MF13
W46Foxfire Village Obs., 3 in MPEC 2020-B307 -- 2011 CT4, 437316, 137199
E89Geyserland Obs. in New Zealand, 1 in MPEC 2020-B307 -- 106538
203GiaGa Obs. in Italy, 1 in MPEC 2020-B291 -- 2020 BG13
J95Great Shefford Obs. in England, 1 in MPEC 2020-B313 -- 2020 BZ13
Q62iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2020-B307 -- 2020 BW8
304Las Campanas Obs. in Chile, 1 in MPEC 2020-B309 -- 2018 MF13
K91LCO Sutherland A in South Africa, 1 in MPEC 2020-B307 -- 2020 BX12
K92LCO Sutherland B in South Africa, 1 in MPEC 2020-B303 -- 2020 BU13
K38M57 Obs. in Italy, 1 in MPEC 2020-B291 -- 2020 BG13
H01Magdalena Ridge Obs. (MRO) in New Mexico, 7 in MPECs 2020-B291, 2020-B293, 2020-B294, 2020-B296, 2020-B297, 2020-B304 & 2020-B311 -- 2020 BV13, 2020 BN13, 2020 BM13, 2020 BK13, 2020 BJ13, 2020 BG13, 2020 BA14
568^R. Wainscoat on Mauna Kea in Hawaii, 5 in MPECs 2020-B292, 2020-B303, 2020-B304, 2020-B305 & 2020-B306 -- 2020 BX13, 2020 BW13, 2020 BV13, 2020 BU13, 2020 BH13
G96Mt. Lemmon Survey (MLS) in Arizona, 35 in MPECs 2020-B293, 2020-B294, 2020-B296, 2020-B297, 2020-B299, 2020-B300, 2020-B302, 2020-B307, 2020-B311, 2020-B312 & 2020-B313 -- 2020 BZ13, 2020 BT13, 2020 BQ13, 2020 BP13, 2020 BN13, 2020 BM13, 2020 BL5, 2020 BK13, 2020 BJ13, 2020 BD13, 2020 BB13, 2020 BA6, 2020 BA4, 2020 BA14, 2018 BA7, 2017 DU15, 2015 VU142, 2014 HH192, 2006 YU1, 2006 KY86, 2000 WO148, 96315, 66251, 65690, 489486, 480936, 467475, 439908, 415027, 144411, 143947, 141498, 138911, 8566, 4954
Z80Northolt Branch Obs. in England, 1 in MPEC 2020-B313 -- 2020 BZ13
J43Oukaimeden Obs. in Morocco, 3 in MPEC 2020-B307 -- 2018 BP, 2016 AX147, 2004 CH52
F51Pan-STARRS 1 (PS1) in Hawaii, 36 in MPECs 2020-B292, 2020-B295, 2020-B296, 2020-B298, 2020-B301, 2020-B302, 2020-B303, 2020-B304, 2020-B306, 2020-B307, 2020-B308 & 2020-B312 -- 2020 BY13, 2020 BX13, 2020 BW5, 2020 BV13, 2020 BU13, 2020 BT13, 2020 BR13, 2020 BO13, 2020 BM13, 2020 BL13, 2020 BH13, 2019 XN1, 2019 XL1, 2019 TV33, 2019 QF2, 2017 DU15, 2017 BP31, 2016 AX147, 2015 HU116, 2014 YW34, 2014 YU43, 2013 CK89, 2012 BD124, 2005 SQ, 2004 XK29, 511684, 455322, 415267, 386298, 257744, 205378, 20255, 159533, 136582, 5626, 1627
F52Pan-STARRS 2 (PS2) in Hawaii, 18 in MPECs 2020-B293, 2020-B301, 2020-B302, 2020-B303, 2020-B305, 2020-B306, 2020-B307 & 2020-B311 -- 2020 BX13, 2020 BW13, 2020 BU13, 2020 BT13, 2020 BR13, 2020 BJ13, 2020 BA14, 2019 YS4, 2019 WB6, 2019 QR6, 425450, 363814, 214088, 162038, 15745, 11066, 5646, 2329
K63Pascoli Obs. in Italy, 1 in MPEC 2020-B291 -- 2020 BG13
104San Marcello Pistoiese Obs. in Italy, 3 in MPECs 2020-B291, 2020-B293 & 2020-B294 -- 2020 BK13, 2020 BJ13, 2020 BG13
C95SATINO-1 in France, 2 in MPECs 2020-B291 & 2020-B307 -- 2020 BG13, 2015 DE200
033Schwarzschild Obs. in Germany, 2 in MPECs 2020-B291 & 2020-B295 -- 2020 BL13, 2020 BG13
587Sormano Obs. in Italy, 1 in MPEC 2020-B291 -- 2020 BG13
691Spacewatch 0.9m telescope in Arizona, 15 in MPEC 2020-B307 -- 2020 BX2, 2020 BW5, 2020 BS, 2020 BK7, 2020 BK10, 2020 AU, 2019 WP3, 2019 WF3, 2019 PY, 2018 PA20, 2017 WP28, 2016 XH1, 2011 UC292, 2011 CT4, 163694
291Spacewatch 1.8m telescope in Arizona, 13 in MPECs 2020-B297, 2020-B298, 2020-B303, 2020-B306, 2020-B307 & 2020-B308 -- 2020 BY13, 2020 BX13, 2020 BU13, 2020 BT2, 2020 BS3, 2020 BQ12, 2020 BO13, 2020 BN13, 2020 BL8, 2020 BD, 2019 XY2, 2019 SC7, 2016 AF193
I52Steward Obs. Mt. Lemmon Station in Arizona, 21 in MPECs 2020-B291, 2020-B293, 2020-B294, 2020-B296, 2020-B297, 2020-B299, 2020-B301, 2020-B302, 2020-B303, 2020-B307, 2020-B308, 2020-B312 & 2020-B313 -- 2020 BZ13, 2020 BY9, 2020 BY13, 2020 BX10, 2020 BW8, 2020 BU13, 2020 BU, 2020 BT13, 2020 BR5, 2020 BR13, 2020 BP13, 2020 BN2, 2020 BN13, 2020 BM13, 2020 BK13, 2020 BJ13, 2020 BG3, 2020 BG13, 2019 XA3, 2017 DU15, 2014 BG3
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 5 in MPEC 2020-B307 -- 2020 BN7, 2020 BN11, 2020 BC6, 2020 AY1, 2003 HM
T14UH/Tholen NEO Follow-Up CFH Telescope in Hawaii, 1 in MPEC 2020-B310 -- 2016 CW137
L01Visnjan Obs., 5 in MPECs 2020-B291, 2020-B293, 2020-B294, 2020-B295 & 2020-B296 -- 2020 BM13, 2020 BL13, 2020 BK13, 2020 BJ13, 2020 BG13
C51WISE in Earth polar orbit, 4 in MPEC 2020-B307 -- 2006 KY86, 85628, 483878, 10115
C42Xingming Obs. in China, 1 in MPEC 2020-B313 -- 2020 BZ13
I41Zwicky Transient Facility (ZTF) in southern California, 16 in MPEC 2020-B307 -- 2020 BH11, 2019 WB6, 2019 TZ4, 2004 CH52, 99248, 512245, 488490, 438452, 374188, 34613, 248926, 162038, 154029, 153842, 138013, 1627
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 31 January '20

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
2020 BW13JPL Sentry16502084-209023.9764e-07-7.78-7.850JPL: Computed at 05:03 today Pacific time based on 12 observations spanning 7.7390 days (2020-Jan-23.537363 to 2020-Jan-31.27633). Diameter approximately 0.013 km. from weighted mean H=27.13.
NEODyS16502068-210151.81e-07-8.14-8.190NEODyS: "Based on 12 optical observations (of which 0 are rejected as outliers) from 2020-01-23.538 to 2020-01-31.277."
2020 BU13NEODyS16502049-210025.23e-10-7.03-7.060NEODyS: "Based on 38 optical observations (of which 1 are rejected as outliers) from 2020-01-25.305 to 2020-01-29.268."
JPL Sentry02552087-211856.57057e-08-4.98-5.120JPL: Computed at 18:33 Jan. 30th Pacific time based on 37 observations spanning 3.9629 days (2020-Jan-25.304418 to 2020-Jan-29.267323). Diameter approximately 0.190 km. from weighted mean H=21.27.
2020 BA13NEODyS16502068-2105183.15e-06-7.51-8.060NEODyS: "Based on 22 optical observations (of which 0 are rejected as outliers) from 2020-01-28.326 to 2020-01-30.028."
2020 BQ12JPL Sentry16502093-209325.9414e-08-7.16-7.180JPL: Computed at 08:07 today Pacific time based on 32 observations spanning 2.9688 days (2020-Jan-28.235094 to 2020-Jan-31.20387). Diameter approximately 0.048 km. from weighted mean H=24.25.
2020 BP12JPL Sentry1650R E M O V E DJPL: Risk listing removed at 1608 UTC today
2020 BW5JPL Sentry16502046-2110102.030802e-05-5.28-5.340JPL: Computed at 07:48 today Pacific time based on 41 observations spanning 8.9004 days (2020-Jan-22.516545 to 2020-Jan-31.41698). Diameter approximately 0.017 km. from weighted mean H=26.46.
2020 AY1JPL Sentry1650R E M O V E DJPL: Risk listing removed at 1551 UTC today
2019 BE5NEODyS1650R E M O V E D-

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 31 January '20

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

2130Grabbed MPEC 2020-B313 - 2020 BZ13 - see above
2010Generated Traffic Report
1914Grabbed MPEC 2020-B312 - 2017 DU15 - see above
1650Noted that NEODyS has removed 2019 BE5 as an impact risk - see above
Noted that JPL Sentry has removed 2020 AY1 as an impact risk - see above
Noted that NEODyS has posted 2020 BA13 as an impact risk - see above
Noted that JPL Sentry has removed 2020 BP12 as an impact risk - see above
Noted that JPL Sentry has updated its 2020 BQ12 risk assessment - see above
Noted that NEODyS has posted 2020 BU13 as an impact risk - see above
Noted that JPL Sentry has posted 2020 BW13 as an impact risk - see above
Noted that NEODyS has posted 2020 BW13 as an impact risk - see above
Noted that JPL Sentry has updated its 2020 BW5 risk assessment - see above
Grabbed MPEC 2020-B305 - 2020 BW13 - see above
Grabbed MPEC 2020-B306 - 2020 BX13 - see above
Grabbed MPEC 2020-B307 - Daily Orbit Update - see above
Grabbed MPEC 2020-B308 - 2020 BY13 - see above
Grabbed MPEC 2020-B309 - 2018 MF13 - see above
Grabbed MPEC 2020-B310 - 2016 CW137 - see above
Grabbed MPEC 2020-B311 - 2020 BA14 - see above
0255Noted that JPL Sentry has posted 2020 BU13 as an impact risk - see above
0130Grabbed MPEC 2020-B304 - 2020 BV13 - see above
0115Grabbed MPEC 2020-B303 - 2020 BU13 - see above
0101Grabbed MPEC 2020-B300 - 2020 BQ13 - see above
Grabbed MPEC 2020-B301 - 2020 BR13 - see above
Grabbed MPEC 2020-B302 - 2020 BT13 - see above
0046Grabbed MPEC 2020-B298 - 2020 BO13 - see above
Grabbed MPEC 2020-B299 - 2020 BP13 - see above
0030Grabbed MPEC 2020-B294 - 2020 BK13 - see above
Grabbed MPEC 2020-B295 - 2020 BL13 - see above
Grabbed MPEC 2020-B296 - 2020 BM13 - see above
Grabbed MPEC 2020-B297 - 2020 BN13 - see above
0008Grabbed MPEC 2020-B291 - 2020 BG13 - see above
Grabbed MPEC 2020-B292 - 2020 BH13 - see above
Grabbed MPEC 2020-B293 - 2020 BJ13 - see above