Contents  on 29 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 29 January '20

Fourteen objects reported inside ten LD

There are fourteen asteroidal objects reported inside ten lunar distances (LD) of our home world today. The closest is 2020 BJ7, which moves away from 3.28 to 7.68 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
0.18 LD Jan. 25 2020 BH6 7 m  8.23 to 10.40 LD Jan. 20 - 29 intruder, exits ten LD
1.24 LD yesterday 2020 BJ7 8 m  3.28 to 7.68 LD Jan. 26 - 30
2.00 LD Jan. 21 2020 BB 7 m  6.24 to 7.01 LD Jan. 9 - Feb. 2 NHATS target, risk
3.69 LD Feb. 4 2013 BA74 27 m  9.32 from 10.87 LD today - Feb. 9 enters ten LD - DOU
4.5   LD tomorrow* 2020 BL11 9 m  4.5 from 4.6 LD Jan. 17 - Feb. 11 NEW, EPU +/- 13 mins.* - MPEC
5.09 LD Jan. 26 2020 BH3 21 m  6.37 to 7.40 LD Jan. 20 - Feb. 1 NHATS target, risk
5.65 LD Jan. 31 2020 BZ4 9 m  6.60 from 7.83 LD Jan. 27 - Feb. 4 NHATS target
5.89 LD tomorrow 2020 BV7 9 m  6.00 from 6.61 LD Jan. 26 - Feb. 3 NHATS target
6.23 LD Jan. 25 2020 BW10 27 m  8.25 to 9.48 LD Jan. 21 - 30 NEW - MPEC
6.60 LD Feb. 8 2020 BL8 25 m  9.29 from 9.79 LD yesterday - Feb. 18 NHATS target
6.89 LD Jan. 27 2020 BY4 20 m  8.58 to 12.04 LD Jan. 26 - 29 exits ten LD, risk
7.60 LD Jan. 24 2020 BF9 17 m  9.39 to 10.22 LD Jan. 19 - 29 exits ten LD
7.74 LD Jan. 24 2020 BF1 20 m  9.17 to 9.76 LD Jan. 18 - 30 NHATS target
7.8   LD Jan. 25* 2020 BK8 7 m  9.8 to 10.9 LD Jan. 22 - 29 EPU +/- 5 mins.*, exits ten LD

This report was generated at 2145 UTC with two discoveries announced late yesterday: outbound 2020 BW10 (MPEC) and already departed 2020 BY10 (MPEC), which slipped by us at about 4.3 LD on January 19th (uncertainty +/- 1.32 hours), and with a discovery from today, inbound 2020 BL11 (MPEC). Today's DOU MPEC has follow-up for inbound 2013 BA74 and six departed objects: 2020 BX9, 2020 BS1, 2020 BS, and including three risk-listed -- 2020 BK3, 2020 AY1, and 2019 YV1.

Approaching - sorted by 10-LD bubble entry date
Earth passage I D ~Size Distance today  Inside ten LD Notes
9.62 LD Jan. 31 2020 BR8 26 m  11.85 from 16.58 LD tomorrow - Jan. 31
2.8   LD Feb. 6* 2020 BF10 12 m  15.1 from 17.1 LD Feb. 1 - 11 EPU +/- 8 mins.*, NHATS target
5.2   LD Feb. 9* 2020 BW5 17 m  22.8 from 24.8 LD Feb. 5 - 14 EPU +/- 9 mins.*, NHATS target, risk
1.9   LD Feb. 9* 2020 BK10 19 m  28.4 from 31.1 LD Feb. 6 - 13 EPU +/- 7.85 hours*
* 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 29 January '20

The MPC's NEO Confirmation Page has 128 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 128 objects listed. Of these, 66 were "one nighters." So far The Tracking News has counted a total of 166 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 29 January '20

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been 22 MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2020-B263 - "22:53 UT" - 2020 BZ11


MPEC 2020-B262 - "21:38 UT" - 2020 BY11


MPEC 2020-B261 - "20:45 UT" - A/2020 B1


MPEC 2020-B260 - "19:44 UT" - 2020 BS11


MPEC 2020-B259 - "19:04 UT" - 2020 BR11


MPEC 2020-B258 - "18:55 UT" - 2020 BQ11


MPEC 2020-B257 - "18:47 UT" - 2020 BP11


MPEC 2020-B256 - "18:39 UT" - 2020 BO11


MPEC 2020-B255 - "18:28 UT" - 2020 BN11


MPEC 2020-B254 - "17:49 UT" - 2020 BM11


MPEC 2020-B253 - "17:45 UT" - 2020 BL11


MPEC 2020-B252 - "15:38 UT" - 2015 PZ228


MPEC 2020-B251 - "14:49 UT" - 2020 BJ11


MPEC 2020-B250 - "13:30 UT" - 2020 BH11


MPEC 2020-B249 - "13:26 UT" - 2020 BG11


<< DOU on 29 January '20 >>  MPEC 2020-B248 - "12:32 UT" - Daily Orbit Update


MPEC 2020-B247 - "05:20 UT" - 2020 BF11


MPEC 2020-B246 - "05:16 UT" - 2020 BE11


MPEC 2020-B245 - "05:14 UT" - 2020 BD11


MPEC 2020-B244 - "02:27 UT" - 2017 BN3


MPEC 2020-B243 - "02:22 UT" - 2017 DO34


MPEC 2020-B242 - "02:10 UT" - 2020 BC11

Observers  on 29 January '20

A total of 30 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 2 in MPECs 2020-B260 & 2020-B262 -- 2020 BY11, 2020 BS11
T05ATLAS Haleakala in Hawaii, 25 in MPEC 2020-B248 -- 2020 BO1, 2019 XG1, 2015 OX78, 2013 AW52, 2012 BE124, 2004 MD, 2002 EY2, 52768, 448818, 416591, 416231, 333555, 331876, 281365, 248926, 18172, 162080, 137199, 136993, 111253, 103067, 9400, 6455, 6047, 1866
T08ATLAS Mauna Loa in Hawaii, 37 in MPEC 2020-B248 -- 2020 AZ2, 2019 WB6, 2018 BP, 2015 XK351, 2013 UV10, 2006 KY86, 90075, 65690, 54686, 53110, 512245, 512244, 492143, 458732, 437316, 391275, 36236, 35107, 338347, 310442, 243025, 218863, 203015, 163250, 162038, 143947, 138013, 137925, 137170, 137120, 11405, 11066, 106589, 106538, 8566, 4055, 2059
Z84Calar Alto Schmidt in Spain, 1 in MPEC 2020-B248 -- 2020 BD11
X74Campo dos Amarais Obs., 1 in MPEC 2020-B248 -- 142555
Z36Cancelada Obs., 2 in MPEC 2020-B248 -- 2015 DE200, 248926
703Catalina Sky Survey (CSS) in Arizona, 26 in MPECs 2020-B248 & 2020-B253 -- 2020 BV1, 2020 BO1, 2020 BL11, 2019 XG1, 2019 WR2, 2015 OX78, 2012 BE124, 2009 AH16, 2004 MD, 2002 EY2, 1996 AE2, 90367, 89830, 539940, 52768, 511523, 459386, 416591, 18172, 162080, 137099, 137064, 136993, 111253, 103067, 9400
K88GINOP-KHK in Hungary, 4 in MPECs 2020-B245, 2020-B246, 2020-B247 & 2020-B260 -- 2020 BS11, 2020 BF11, 2020 BE11, 2020 BD11
H01Magdalena Ridge Obs. (MRO) in New Mexico, 5 in MPECs 2020-B246, 2020-B249, 2020-B250, 2020-B253 & 2020-B262 -- 2020 BY11, 2020 BL11, 2020 BH11, 2020 BG11, 2020 BE11
Z22MASTER IAC Obs. in the Canary Islands, 3 in MPEC 2020-B248 -- 455322, 438452, 34613
568^R. Wainscoat on Mauna Kea in Hawaii, 2 in MPECs 2020-B254 & 2020-B261 -- 2020 BM11, 2020 B1
108Montelupo Obs. in Italy, 5 in MPEC 2020-B248 -- 2015 OX78, 52768, 34613, 103067, 9400
G96Mt. Lemmon Survey (MLS) in Arizona, 38 in MPECs 2020-B242, 2020-B244, 2020-B248, 2020-B249, 2020-B256, 2020-B257, 2020-B258, 2020-B259 & 2020-B262 -- 2020 BY11, 2020 BR11, 2020 BQ11, 2020 BP11, 2020 BO3, 2020 BO11, 2020 BN9, 2020 BJ9, 2020 BG6, 2020 BG11, 2020 BF4, 2020 BC11, 2019 YY5, 2019 YE2, 2019 NM1, 2017 BN3, 2016 CW31, 2015 XK351, 2010 CH55, 2008 OX1, 2008 AG1, 53110, 500094, 497135, 458732, 452421, 36236, 317685, 285944, 285567, 175189, 164217, 159928, 138013, 11405, 106538, 2329, 2059
J69North Obs. in England, 1 in MPEC 2020-B248 -- 2013 BA74
F51Pan-STARRS 1 (PS1) in Hawaii, 43 in MPECs 2020-B245, 2020-B246, 2020-B247, 2020-B248, 2020-B249, 2020-B250, 2020-B251, 2020-B254, 2020-B257, 2020-B258, 2020-B260, 2020-B261 & 2020-B263 -- 2020 BZ11, 2020 BW, 2020 BS11, 2020 BQ11, 2020 BP11, 2020 BM11, 2020 BL5, 2020 BK3, 2020 BJ11, 2020 BH11, 2020 BG11, 2020 BF11, 2020 BE11, 2020 BE1, 2020 BD11, 2020 B1, 2020 AK, 2020 AG1, 2019 XG1, 2018 BA7, 2015 HB10, 2015 DY53, 2013 DU, 2012 BE124, 2011 FY2, 2011 AO52, 2004 RY109, 85953, 68063, 54686, 54401, 497135, 458732, 386259, 382503, 349928, 249595, 243298, 238063, 217430, 164400, 103067, 7358
F52Pan-STARRS 2 (PS2) in Hawaii, 34 in MPECs 2020-B242, 2020-B243, 2020-B247, 2020-B248, 2020-B250, 2020-B253, 2020-B254, 2020-B256, 2020-B257, 2020-B259 & 2020-B263 -- 2020 BZ11, 2020 BS2, 2020 BR11, 2020 BP11, 2020 BO11, 2020 BM11, 2020 BL11, 2020 BH11, 2020 BF11, 2020 BC11, 2019 XG, 2019 TZ4, 2018 BP, 2018 BN3, 2017 DO34, 2016 VQ5, 2013 UV10, 2009 BB, 2008 RS26, 2006 TD1, 99248, 488490, 459386, 343158, 337557, 267221, 177651, 164211, 153842, 153814, 137199, 137052, 106538, 1864
654Pomona College Table Mtn. Obs. (PCTMO) in southern California, 5 in MPEC 2020-B248 -- 2020 BX9, 2020 BS1, 2019 YG7, 2015 OX78, 2009 BH2
C95SATINO-1 in France, 2 in MPECs 2020-B248 & 2020-B250 -- 2020 BH11, 2008 YX32
033Schwarzschild Obs. in Germany, 8 in MPECs 2020-B242, 2020-B243, 2020-B244, 2020-B245, 2020-B246, 2020-B247, 2020-B250 & 2020-B260 -- 2020 BS11, 2020 BH11, 2020 BF11, 2020 BE11, 2020 BD11, 2020 BC11, 2017 DO34, 2017 BN3
G40!M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2020-B248 -- 2020 BV
G40'W.F. Cashwell in Nevada via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2020-B248 -- 2009 AH16
587Sormano Obs. in Italy, 1 in MPEC 2020-B260 -- 2020 BS11
691Spacewatch 0.9m telescope in Arizona, 8 in MPEC 2020-B248 -- 2020 BT2, 2020 BS, 2020 BO3, 2019 XF1, 2019 WP3, 2019 MS3, 2015 BK509, 2011 YB40
291Spacewatch 1.8m telescope in Arizona, 5 in MPECs 2020-B248 & 2020-B256 -- 2020 BO11, 2020 AY1, 2019 YL4, 2019 PE2, 2010 MU112
I52Steward Obs. Mt. Lemmon Station in Arizona, 21 in MPECs 2020-B242, 2020-B244, 2020-B246, 2020-B248, 2020-B249, 2020-B250, 2020-B251, 2020-B253, 2020-B254, 2020-B257, 2020-B259, 2020-B260 & 2020-B262 -- 2020 BY6, 2020 BY11, 2020 BV, 2020 BS7, 2020 BS11, 2020 BR7, 2020 BR11, 2020 BP11, 2020 BO8, 2020 BO1, 2020 BN9, 2020 BM11, 2020 BL11, 2020 BJ11, 2020 BH11, 2020 BG6, 2020 BG11, 2020 BE9, 2020 BE11, 2020 BC11, 2017 BN3
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPECs 2020-B248 & 2020-B252 -- 2019 YV1, 2015 PZ228
T14UH/Tholen NEO Follow-Up CFH Telescope in Hawaii, 1 in MPEC 2020-B255 -- 2020 BN11
L01Visnjan Obs., 6 in MPECs 2020-B245, 2020-B246, 2020-B247, 2020-B248, 2020-B250 & 2020-B260 -- 2020 BS11, 2020 BH11, 2020 BF11, 2020 BE11, 2020 BD11, 2017 DO34
C51WISE in Earth polar orbit, 1 in MPEC 2020-B255 -- 2020 BN11
Z57Zuben Obs., 2 in MPEC 2020-B248 -- 2015 DE200, 525364
I41Zwicky Transient Facility (ZTF) in southern California, 31 in MPECs 2020-B248 & 2020-B250 -- 2020 BH11, 2019 YG7, 2019 XG1, 2019 TZ4, 2014 NF64, 2013 UR3, 2008 PG2, 2006 KY86, 2004 MD, 89830, 53319, 53110, 52768, 516986, 511684, 511243, 416591, 416231, 374188, 348595, 34613, 331792, 205378, 137084, 12923, 6456, 6047, 3200, 2059, 1627, 1620
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 29 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 BY11JPL Sentry23302118-211813.650e-08-9.04-9.040JPL: Computed at 15:00 today Pacific time based on 21 observations spanning 2.9874 days (2020-Jan-26.41131 to 2020-Jan-29.39871). Diameter approximately 0.009 km. from weighted mean H=27.76.
2020 BN11JPL Sentry21002100-210011.302e-09-7.36-7.360JPL: Computed at 11:22 today Pacific time based on 12 observations spanning 11.425 days (2020-Jan-17.945515 to 2020-Jan-29.370707). Diameter approximately 0.180 km. from weighted mean H=21.41.
2020 BC8NEODyS1600R E M O V E D-
2020 BK3JPL Sentry17302091-2113120.00065019129-4.30-4.300JPL: Computed at 09:08 today Pacific time based on 79 observations spanning 6.0347 days (2020-Jan-22.395303 to 2020-Jan-28.430029). Diameter approximately 0.014 km. from weighted mean H=26.90.
NEODyS16002091-2113227.45e-04-4.25-4.250NEODyS: "Based on 79 optical observations (of which 0 are rejected as outliers) from 2020-01-22.396 to 2020-01-28.431."
2020 AY1JPL Sentry17302103-210311.877e-07-7.20-7.200JPL: Computed at 09:09 today Pacific time based on 116 observations spanning 24.060 days (2020-Jan-05.24158 to 2020-Jan-29.30183). Diameter approximately 0.031 km. from weighted mean H=25.16.
NEODyS1600210315.24e-08-7.76-7.760NEODyS: "Based on 117 optical observations (of which 4 are rejected as outliers) from 2020-01-05.242 to 2020-01-29.303."
2019 YV1JPL Sentry17302101-211451.20313e-05-5.41-5.550JPL: Computed at 09:09 today Pacific time based on 86 observations spanning 36.246 days (2019-Dec-21.11125 to 2020-Jan-26.35731). Diameter approximately 0.032 km. from weighted mean H=25.12.
NEODyS16002099-2115107.03e-06-5.66-5.750NEODyS: "Based on 86 optical observations (of which 0 are rejected as outliers) from 2019-12-21.112 to 2020-01-26.358."
2016 AZ193JPL Sentry17302020-21144932.1924636e-06-6.31-7.220JPL: Computed at 14:28 April 6th of 2017 Pacific time based on 9 observations spanning .15930 days (2016-Jan-03.25638 to 2016-Jan-03.41568). Diameter approximately 0.016 km. from weighted mean H=26.62.

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 29 January '20

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

2330Noted that JPL Sentry has posted 2020 BY11 as an impact risk - see above
2301Grabbed MPEC 2020-B263 - 2020 BZ11 - see above
2205Grabbed MPEC 2020-B262 - 2020 BY11 - see above
2145Generated Traffic Report
2100Noted that JPL Sentry has posted 2020 BN11 as an impact risk - see above
Grabbed MPEC 2020-B259 - 2020 BR11 - see above
Grabbed MPEC 2020-B260 - 2020 BS11 - see above
Grabbed MPEC 2020-B261 - A/2020 B1 - see above
1900Grabbed MPEC 2020-B256 - 2020 BO11 - see above
Grabbed MPEC 2020-B257 - 2020 BP11 - see above
Grabbed MPEC 2020-B258 - 2020 BQ11 - see above
1835Grabbed MPEC 2020-B253 - 2020 BL11 - see above
Grabbed MPEC 2020-B254 - 2020 BM11 - see above
Grabbed MPEC 2020-B255 - 2020 BN11 - see above
1730Noted that JPL Sentry has updated its 2016 AZ193 risk assessment - see above
Noted that JPL Sentry has updated its 2019 YV1 risk assessment - see above
Noted that JPL Sentry has reposted 2020 AY1 as an impact risk - see above
Noted that JPL Sentry has updated its 2020 BK3 risk assessment - see above
1600Noted that NEODyS has updated its 2019 YV1 risk assessment - see above
Noted that NEODyS has reposted 2020 AY1 as an impact risk - see above
Noted that NEODyS has removed 2020 BC8 as an impact risk - see above
Noted that NEODyS has updated its 2020 BK3 risk assessment - see above
Grabbed MPEC 2020-B248 - Daily Orbit Update - see above
Grabbed MPEC 2020-B249 - 2020 BG11 - see above
Grabbed MPEC 2020-B250 - 2020 BH11 - see above
Grabbed MPEC 2020-B251 - 2020 BJ11 - see above
Grabbed MPEC 2020-B252 - 2015 PZ228 - see above
0614Grabbed MPEC 2020-B245 - 2020 BD11 - see above
Grabbed MPEC 2020-B246 - 2020 BE11 - see above
Grabbed MPEC 2020-B247 - 2020 BF11 - see above
0455Grabbed MPEC 2020-B242 - 2020 BC11 - see above
Grabbed MPEC 2020-B243 - 2017 DO34 - see above
Grabbed MPEC 2020-B244 - 2017 BN3 - see above