Contents  on 23 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 23 January '20

Fourteen objects reported inside ten LD

There are fourteen Solar-System small bodies reported to be within ten lunar distances (LD) of our planet today. Risk-listed 2020 BB is the nearest and exits Earth's SOI as it moves away from 2.25 to 2.72 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
0.8   LD Jan. 20* 2020 BK3 14 m  5.1 to 7.4 LD Jan. 16 - 25 NEW, EPU +/- 5 mins.*, intruder, risk - MPEC
2.00 LD Jan. 21 2020 BB 6 m  2.25 to 2.72 LD Jan. 9 - Feb. 2 NHATS target, exits Earth SOI, risk
2.56 LD today 2020 BB1 8 m  2.56 LD Jan. 19 - 27 Earth closest at 0838 UTC
2.7   LD Jan. 14* 2020 BH 8 m  7.3 to 8.0 LD Jan. 1 - 26 EPU +/- 5 mins.*, NHATS target, risk
2.99 LD Jan. 14 2020 BS 9 m  8.17 to 9.05 LD Jan. 4 - 25 NHATS target
3.67 LD Jan. 21 2020 BP 25 m  6.06 to 9.32 LD Jan. 19 - 24
3.71 LD Jan. 10 2019 YF4 13 m  8.77 to 9.33 LD Dec. 27 - Jan. 25 NHATS target
3.82 LD Jan. 21 2020 BY 43 m  5.59 to 8.73 LD Jan. 19 - 24
5.09 LD Jan. 26 2020 BH3 22 m  6.35 from 7.36 LD Jan. 20 - Feb. 1 NEW, NHATS target, risk - MPEC
6.4   LD Jan. 19* 2020 BK 16 m  7.4 to 7.9 LD Jan. 11 - 27 EPU +/- 12 mins.*, NHATS target
6.61 LD Jan. 21 2020 BS1 19 m  6.85 to 7.28 LD Jan. 15 - 27 NHATS target - DOU
7.7   LD tomorrow* 2020 BF1 21 m  7.7 from 7.8 LD Jan. 18 - 30 EPU +/- 20 mins.*, NHATS target, risk
8.30 LD Jan. 25 2020 AK3 21 m  8.54 from 9.04 LD Jan. 21 - 28 NHATS target
9.77 LD Jan. 21 2020 BN 9 m  9.87 to 10.16 LD Jan. 20 - 23 exits ten LD - DOU
Approaching - sorted by 10-LD bubble entry date
Earth passage I D ~Size Distance today  Inside ten LD Notes
6.8   LD Jan. 27* 2020 BN3 29 m  21.9 from 28.2 LD Jan. 26 - 28 NEW, EPU +/- 9 mins.* - MPEC
3.69 LD Feb. 4 2013 BA74 27 m  18.95 from 20.60 LD Jan. 29 - Feb. 9
* EPU = Earth passage uncertainty

This report was generated at 2135 UTC with three discoveries announced late yesterday of approaching 2020 BN3 (MPEC) and risk-listed objects inbound 2020 BH3 (MPEC) and outbound intruder 2020 BK3 (MPEC), plus today's announcement of departed 2020 BL4 (MPEC), which sneaked past us at perhaps 5.1 LD on December 27th (uncertainty +/- 2.821 days). One of today's two DOU MPECs has follow-up for outbound objects 2020 BS1 and 2020 BN and for six departed objects: 2020 BZ1, 2020 BN1, 2020 BD, 2019 YA1, and including risk-listed 2020 BY1 and 2020 BD1, as well as observations from December of risk-listed 2019 WV1 (6.05 days added to 2.75-day observing arc) and from October of 2019 PM (84.37 days added to 2.50).



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.

Radar Astrometry  on 23 January '20

Radar observation of one object

The JPL Solar System Dynamics Group Radar Astrometry database has added or updated the following small-body radar observing work:


Data update noted at 0105 UTC when the database was dated 22 Jan.



Photometry and some astrometry is needed for upcoming radar targets. See Arecibo and Goldstone schedules.

NEOCP Activity  on 23 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, 65 were "one nighters." So far The Tracking News has counted a total of 160 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 23 January '20

Minor Planet Electronic Circulars

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


MPEC 2020-B104 - "23:48 UT" - 2016 AJ193


MPEC 2020-B103 - "21:32 UT" - 2016 AJ9


MPEC 2020-B102 - "17:18 UT" - 2020 BL4


MPEC 2020-B101 - "17:14 UT" - 2020 BK4


MPEC 2020-B100 - "17:10 UT" - 2020 BJ4


MPEC 2020-B99 - "16:48 UT" - 2020 BF4


MPEC 2020-B98 - "16:39 UT" - 2020 BA4


MPEC 2020-B97 - "16:27 UT" - 2011 CK50


MPEC 2020-B96 - "16:20 UT" - 2020 BX3


<< DOU on 23 January '20 >>  MPEC 2020-B95 - "16:05 UT" - Daily Orbit Update


<< DOU on 23 January '20 >>  MPEC 2020-B94 - "15:33 UT" - Daily Orbit Update


MPEC 2020-B93 - "15:19 UT" - 2008 AG1


MPEC 2020-B92 - "01:08 UT" - 2020 BU3


MPEC 2020-B91 - "01:05 UT" - 2020 BT3


MPEC 2020-B90 - "01:04 UT" - 2020 BS3


MPEC 2020-B89 - "01:02 UT" - 2020 BR3


MPEC 2020-B88 - "01:00 UT" - 2020 BQ3

Observers  on 23 January '20

A total of 43 observers appear in today's MPECs.

CodeObserver / observatory
U71AHS Obs., 1 in MPEC 2020-B94 -- 163373
C97Al-Fulaij Obs., 14 in MPEC 2020-B94 -- 2020 BR, 2020 BE, 2014 NF64, 52768, 458732, 437316, 310442, 30825, 18172, 137925, 11405, 106538, 103067, 2059
251Arecibo in Puerto Rico, 1 in radar -- 216258
H21Astronomical Research Obs. Westfield in Illinois, 2 in MPECs 2020-B94 & 2020-B99 -- 2020 BF4, 2020 AS2
T05ATLAS Haleakala in Hawaii, 29 in MPECs 2020-B94 & 2020-B98 -- 2020 BS1, 2020 BA4, 2019 WB6, 2015 XK351, 2015 HU116, 2007 BJ29, 96315, 90075, 54686, 512245, 512244, 492143, 458732, 36236, 35107, 338347, 329340, 311044, 310442, 243025, 203015, 137925, 11405, 106589, 106538, 5626, 4487, 3102, 2059
T08ATLAS Mauna Loa in Hawaii, 22 in MPECs 2020-B94 & 2020-B98 -- 2020 BS1, 2020 BO1, 2020 BA4, 2019 XG1, 2019 TH6, 2017 AE5, 2012 BE124, 2008 YX32, 1996 AE2, 89830, 483878, 448818, 416591, 333555, 18172, 163696, 162080, 137199, 136993, 136795, 6455, 1866
160Castelmartini Obs. in Italy, 15 in MPEC 2020-B94 -- 2020 BE, 2020 BB3, 2015 OX78, 2014 NF64, 99248, 458745, 437316, 427778, 416002, 310442, 30825, 243025, 214088, 137199, 106538
703Catalina Sky Survey (CSS) in Arizona, 41 in MPECs 2020-B94 & 2020-B104 -- 2020 AD3, 2019 YE4, 2019 YD2, 2019 XL1, 2019 SH6, 2017 MX4, 2016 AX147, 2016 AJ193, 2015 OX78, 2014 AD17, 2011 CT4, 2008 OX1, 2004 BT58, 99248, 86326, 86067, 85628, 68350, 511684, 474223, 455322, 438452, 374188, 36284, 34613, 307070, 232368, 163373, 15745, 152931, 138846, 137924, 137084, 10145, 10115, 7088, 5693, 5626, 3752, 1864, 1627
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 5 in MPECs 2020-B89, 2020-B94 & 2020-B99 -- 2020 BR3, 2020 BF4, 2019 YZ5, 2019 YW3, 2019 YG1
106Crni Vrh Obs. in Slovenia, 1 in MPEC 2020-B94 -- 163373
K87Dettelbach Vineyard Obs. in Germany, 5 in MPEC 2020-B94 -- 2020 BV, 2020 BR, 2020 BH1, 2020 BE, 2020 AO3
W46Foxfire Village Obs., 2 in MPEC 2020-B94 -- 437316, 137199
U76Glendora Obs., 3 in MPEC 2020-B94 -- 354030, 2100, 2059
511Haute Provence Obs. in Germany, 1 in MPEC 2020-B94 -- 99942
H06iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2020-B94 -- 437316
246KLENOT in the Czech Republic, 6 in MPECs 2020-B94, 2020-B98 & 2020-B99 -- 2020 BT, 2020 BJ, 2020 BF4, 2020 BA4, 2020 AS2, 99942
Z43Landehen Obs., 1 in MPEC 2020-B94 -- 163373
W85LCO Cerro Tololo A in Chile, 1 in MPEC 2020-B98 -- 2020 BA4
130Lumezzane Obs. in Italy, 16 in MPEC 2020-B94 -- 2020 BO, 2020 BE, 2020 AD3, 2019 XG1, 2019 UB11, 2018 BP, 2017 AE5, 2015 OX78, 2011 CT4, 516986, 455322, 438452, 416591, 374188, 307070, 20255
H01Magdalena Ridge Obs. (MRO) in New Mexico, 3 in MPECs 2020-B88, 2020-B89 & 2020-B102 -- 2020 BR3, 2020 BQ3, 2020 BL4
711McDonald Obs. in Texas, 1 in MPEC 2020-B88 -- 2020 BQ3
474Mt. John Obs. in New Zealand, 2 in MPECs 2020-B89 & 2020-B98 -- 2020 BR3, 2020 BA4
G96Mt. Lemmon Survey (MLS) in Arizona, 44 in MPECs 2020-B88, 2020-B94, 2020-B95 & 2020-B102 -- 2020 BW2, 2020 BV, 2020 BU3, 2020 BT1, 2020 BQ3, 2020 BN1, 2020 BL4, 2020 BK1, 2020 AW1, 2020 AU2, 2020 AR2, 2020 AM1, 2019 TF7, 2019 SC9, 2018 BN3, 2015 OX78, 2015 DD200, 2014 YW34, 2014 QX390, 2014 DH23, 2013 PV2, 2011 UV63, 2011 ME5, 2010 DN1, 2008 AJ33, 2001 YM4, 96189, 86326, 53550, 528609, 456973, 427778, 416591, 386847, 386298, 358453, 343158, 329520, 174806, 155334, 6456, 6239, 4450, 1864
K74Muensterschwarzach Obs. in Germany, 2 in MPEC 2020-B94 -- 250577, 137924
F51Pan-STARRS 1 (PS1) in Hawaii, 58 in MPECs 2020-B89, 2020-B90, 2020-B92, 2020-B94, 2020-B96, 2020-B97, 2020-B99, 2020-B100, 2020-B101 & 2020-B103 -- 2020 BX3, 2020 BX2, 2020 BW2, 2020 BU3, 2020 BS3, 2020 BR3, 2020 BQ1, 2020 BO2, 2020 BK4, 2020 BJ4, 2020 BF4, 2020 AS2, 2020 AK, 2020 AJ, 2019 YL1, 2019 YA1, 2019 WU4, 2019 SF2, 2019 QF2, 2017 BF3, 2016 JG18, 2016 CJ195, 2016 AX147, 2016 AJ9, 2015 WH13, 2014 YU43, 2014 QP266, 2014 MM55, 2013 DU, 2013 CK89, 2011 CK50, 2009 NH, 2008 XP, 2008 OX1, 85713, 503880, 488490, 455322, 442609, 439898, 416591, 385268, 354101, 348400, 338292, 331769, 322652, 232368, 187040, 173561, 16816, 162452, 162082, 155334, 153958, 136582, 1916, 719
F52Pan-STARRS 2 (PS2) in Hawaii, 41 in MPECs 2020-B90, 2020-B91, 2020-B93, 2020-B94, 2020-B96, 2020-B97, 2020-B100 & 2020-B103 -- 2020 BZ1, 2020 BX3, 2020 BT3, 2020 BS3, 2020 BJ4, 2019 YS4, 2019 YM3, 2019 YJ3, 2019 XL1, 2019 XG1, 2019 WR6, 2019 WR4, 2019 QR6, 2019 PR2, 2016 AJ9, 2011 UC292, 2011 CK50, 2011 AO52, 2010 UE7, 2010 CH55, 2008 AG1, 65674, 53426, 52768, 442243, 438452, 415267, 405562, 39796, 366733, 363814, 354876, 349219, 319988, 303174, 26760, 164221, 152679, 138325, 137925, 6239
A48Povegliano Veronese Obs. in Italy, 1 in MPEC 2020-B94 -- 2020 BV
247roving observer, 1 in MPEC 2020-B94 -- 18172
L40Saarbruecken Rastpfuhl Obs., 2 in MPEC 2020-B94 -- 52768, 163373
104San Marcello Pistoiese Obs. in Italy, 2 in MPECs 2020-B91 & 2020-B92 -- 2020 BU3, 2020 BT3
C95SATINO-1 in France, 1 in MPEC 2020-B94 -- 2015 XK351
K96Savelli Obs., 3 in MPECs 2020-B91, 2020-B92 & 2020-B94 -- 2020 BU3, 2020 BT3, 2020 BB3
204Schiaparelli Obs. in Italy, 1 in MPEC 2020-B97 -- 2011 CK50
033Schwarzschild Obs. in Germany, 5 in MPECs 2020-B88, 2020-B91, 2020-B94, 2020-B97 & 2020-B101 -- 2020 BT3, 2020 BQ3, 2020 BK4, 2020 AS2, 2011 CK50
691Spacewatch 0.9m telescope in Arizona, 5 in MPECs 2020-B94, 2020-B95, 2020-B99 & 2020-B104 -- 2020 BY1, 2020 BF4, 2019 OA5, 2016 AJ193, 1916
291Spacewatch 1.8m telescope in Arizona, 6 in MPECs 2020-B94, 2020-B96, 2020-B100 & 2020-B101 -- 2020 BX3, 2020 BK4, 2020 BJ4, 2020 BD1, 2020 BD, 2019 WO4
I93St. Pardon de Conques Obs. in France, 1 in MPEC 2020-B91 -- 2020 BT3
I52Steward Obs. Mt. Lemmon Station in Arizona, 11 in MPECs 2020-B88, 2020-B94 & 2020-B98 -- 2020 BY1, 2020 BU, 2020 BR, 2020 BQ3, 2020 BO2, 2020 BN, 2020 BJ, 2020 BD, 2020 BA4, 2020 BA1, 2015 DD200
A16Tentlingen Obs. in Switzerland, 3 in MPEC 2020-B94 -- 137925, 106589, 6455
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPEC 2020-B94 -- 2019 WV1, 2019 PM
L01Visnjan Obs., 7 in MPECs 2020-B88, 2020-B89, 2020-B91, 2020-B92, 2020-B93, 2020-B97 & 2020-B99 -- 2020 BU3, 2020 BT3, 2020 BR3, 2020 BQ3, 2020 BF4, 2011 CK50, 2008 AG1
G33Wickede Obs. in Germany, 1 in MPEC 2020-B94 -- 137199
I41Zwicky Transient Facility in southern California, 1 in MPEC 2020-B95 -- 2020 BQ2
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 23 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 BU3JPL Sentry2000R E M O V E DJPL #2 for the day: Risk listing removed at 1947 UTC today
NEODyS1640210114.66e-11-9.29-9.290NEODyS: "Based on 13 optical observations (of which 0 are rejected as outliers) from 2020-01-19.407 to 2020-01-23.013."
2020 BK3NEODyS16402090-2118225.02e-04-4.43-4.580NEODyS: "Based on 42 optical observations (of which 0 are rejected as outliers) from 2020-01-22.396 to 2020-01-22.939."
JPL Sentry00222091-2107100.00040305755-4.51-4.620JPL: Computed at 16:04 Jan. 22nd Pacific time based on 42 observations spanning .54321 days (2020-Jan-22.395303 to 2020-Jan-22.93851). Diameter approximately 0.014 km. from weighted mean H=26.89.
2020 BH3NEODyS16402059-210671.06e-06-6.67-7.070NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2020-01-21.276 to 2020-01-22.740."
JPL Sentry00222059-2110112.4097e-06-6.30-6.680JPL: Computed at 16:01 Jan. 22nd Pacific time based on 15 observations spanning 1.4645 days (2020-Jan-21.274771 to 2020-Jan-22.739289). Diameter approximately 0.022 km. from weighted mean H=25.93.
2020 BY1JPL Sentry20002049-205735.947884e-06-5.41-5.410JPL: Computed at 11:50 today Pacific time based on 43 observations spanning 2.8661 days (2020-Jan-20.460859 to 2020-Jan-23.32694). Diameter approximately 0.020 km. from weighted mean H=26.17.
2020 BD1JPL Sentry2000R E M O V E DJPL: Risk listing removed at 1952 UTC today
2019 WV1JPL Sentry19442078-2117142.801846e-06-7.41-7.850JPL: Computed at 11:34 today Pacific time based on 21 observations spanning 8.8051 days (2019-Nov-24.61277 to 2019-Dec-03.417857). Diameter approximately 0.008 km. from weighted mean H=28.20.
2008 VS4JPL Sentry00222021-21143085.751628e-07-5.56-6.640JPL: Computed at 00:23 April 8th of 2017 Pacific time based on 10 observations spanning .08330 days (2008-Nov-07.413 to 2008-Nov-07.4963). Diameter approximately 0.049 km. from weighted mean H=24.21.

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 23 January '20

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

2358Grabbed MPEC 2020-B104 - 2016 AJ193 - see above
2225Grabbed MPEC 2020-B103 - 2016 AJ9 - see above
2135Generated Traffic Report
2000Noted that JPL Sentry has removed 2020 BD1 as an impact risk - see above
Noted that JPL Sentry has removed 2020 BU3 as an impact risk - see above
Noted that JPL Sentry has updated its 2020 BY1 risk assessment - see above
1944Noted that JPL Sentry has updated its 2019 WV1 risk assessment - see above
1730Grabbed MPEC 2020-B100 - 2020 BJ4 - see above
Grabbed MPEC 2020-B101 - 2020 BK4 - see above
Grabbed MPEC 2020-B102 - 2020 BL4 - see above
1700Grabbed MPEC 2020-B99 - 2020 BF4 - see above
1640Noted that NEODyS has posted 2020 BH3 as an impact risk - see above
Noted that NEODyS has posted 2020 BK3 as an impact risk - see above
Noted that NEODyS has posted 2020 BU3 as an impact risk - see above
Grabbed MPEC 2020-B93 - 2008 AG1 - see above
Grabbed MPEC 2020-B94 - Daily Orbit Update - see above
Grabbed MPEC 2020-B95 - Daily Orbit Update - see above
Grabbed MPEC 2020-B96 - 2020 BX3 - see above
Grabbed MPEC 2020-B97 - 2011 CK50 - see above
Grabbed MPEC 2020-B98 - 2020 BA4 - see above
0231Noted that JPL Sentry has posted 2020 BU3 as an impact risk - see above
0200Grabbed MPEC 2020-B91 - 2020 BT3 - see above
Grabbed MPEC 2020-B92 - 2020 BU3 - see above
0105Grabbed MPEC 2020-B88 - 2020 BQ3 - see above
Grabbed MPEC 2020-B89 - 2020 BR3 - see above
Grabbed MPEC 2020-B90 - 2020 BS3 - see above
Noted Radar Astrometry database update - see above
0022Noted that JPL Sentry has updated its 2008 VS4 risk assessment - see above
Noted that JPL Sentry has posted 2020 BH3 as an impact risk - see above
Noted that JPL Sentry has posted 2020 BK3 as an impact risk - see above