Contents  on 21 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 21 January '19

Six objects reported inside ten LD

Six asteroidal objects are reported inside ten lunar distances (LD) of Earth today. Nearest is 2019 AS11, inbound from 7.22 to 7.02 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. 16 2019 BO 8 m  8.23 to 9.88 LD Jan. 10 - 22 intruder, NHATS target, risk
3.92 LD Jan. 15 2019 AG7 28 m  8.60 to 9.97 LD Jan. 9 - 22 NHATS target
6.95 LD Jan. 23 2019 AS11 15 m  7.02 from 7.22 LD Jan. 15 - 30 NHATS target
7.45 LD Jan. 19 2019 AB5 27 m  7.61 to 8.05 LD Jan. 15 - 24
7.6   LD Jan. 25* 2019 AJ13 8 m  8.6 from 9.3 LD yesterday - Jan. 29 EPU +/- 5 mins.*, NHATS target
7.64 LD Jan. 16 2019 AU9 15 m  9.24 to 9.91 LD Jan. 10 - 22 NHATS target
* EPU = Earth passage uncertainty

This report was generated at 1840 UTC. Today's DOU MPEC has no follow-up for currently close or approaching NEOs but does post astrometry from last October to December for thirteen objects, including first follow-up for 2018 UK (9.95 days added to 1.71-day discovery arc) and 2018 XU (3.02 days added to 3.96).

Approaching - sorted by 10-LD bubble entry date
8.59 LD Jan. 25 2019 AG11 19 m  10.43 from 11.47 LD tomorrow - Jan. 28
5.7   LD Jan. 26* 2019 AA10 26 m  11.2 from 13.3 LD tomorrow - Jan. 29 EPU +/- 6 mins.*
9.1   LD Jan. 25* 2019 AN12 28 m  16.8 from 20.8 LD Jan. 24 - 25 EPU +/- 18 mins.*



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 21 January '19

The MPC's NEO Confirmation Page has 72 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 72 objects listed. Of these, 39 were "one nighters."

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 21 January '19

Minor Planet Electronic Circulars

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


<< DOU on 21 Jan. '19 >>  MPEC 2019-B60 - "13:11 UT" - Daily Orbit Update

Observers  on 21 January '19

A total of 25 observers appear in today's MPEC.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 55 in MPEC 2019-B60 -- 2018 XU, 2018 XO, 2018 WY2, 2018 WW2, 2018 WW1, 2018 WV1, 2018 WO, 2018 WB, 2018 VX8, 2018 VS5, 2018 VK1, 2018 VJ5, 2018 VH2, 2018 VF, 2018 VE5, 2018 VD8, 2018 VA, 2018 UK, 2018 UE1, 2018 TQ2, 2018 TN1, 2018 TB, 2018 SA2, 2018 RR3, 2018 RK7, 2018 RC1, 2018 NV1, 2018 NU3, 2018 ME5, 2018 LZ5, 2018 KT, 2018 KR2, 2018 JS1, 2018 JD5, 2018 GJ1, 2018 FJ4, 2018 CO2, 2018 AP12, 2017 KP34, 2016 VH2, 2016 HM2, 2015 LG2, 2014 SK260, 2013 WR43, 2013 NT11, 2012 VF5, 2011 AW55, 2010 MF1, 2009 UM, 2008 SW11, 2004 YU5, 2004 FW1, 2003 PC11, 1999 CW8, 1998 QQ
T05ATLAS Haleakala in Hawaii, 74 in MPEC 2019-B60 -- 2018 GX4, 2014 XR6, 2012 MM11, 2011 XE1, 2011 OL5, 2010 GT7, 2007 YQ56, 2005 YY36, 2005 WF57, 2003 NW1, 2001 VC2, 89959, 86324, 68216, 65706, 54789, 523805, 523779, 523631, 523610, 523604, 523603, 523587, 518463, 458122, 457260, 455550, 454100, 450238, 442742, 414960, 412995, 410088, 381677, 37336, 345705, 33342, 31345, 31210, 308127, 25916, 250697, 250162, 244670, 242147, 217807, 20790, 20460, 18109, 17274, 170891, 16816, 155110, 152931, 140928, 138852, 137032, 12538, 6456, 5797, 5646, 5143, 5131, 4954, 4401, 4055, 3552, 3288, 3200, 1916, 1865, 1627, 1620, 719
T08ATLAS Mauna Loa in Hawaii, 85 in MPEC 2019-B60 -- 2018 GX4, 2013 AV60, 2012 MM11, 2011 OL5, 2010 GT7, 2005 YY36, 2002 VE68, 2001 VC2, 99799, 96315, 90403, 88263, 68216, 65706, 52387, 523824, 523779, 523610, 523595, 523587, 518735, 518463, 457260, 457212, 455550, 454177, 454100, 442742, 427643, 424482, 42286, 418929, 414960, 412995, 397847, 36284, 345705, 31345, 31210, 308127, 277473, 250162, 244670, 242147, 21088, 208617, 20790, 18736, 18109, 180186, 17274, 170891, 16834, 16816, 163051, 162004, 141498, 141053, 140928, 138937, 138852, 137802, 137032, 13553, 12711, 12538, 6456, 6178, 5587, 5143, 5131, 4596, 4401, 4055, 3691, 3552, 3200, 3199, 2061, 1943, 1916, 1865, 1627, 1620, 719
C77Bernezzo Obs. in Italy, 3 in MPEC 2019-B60 -- 2018 XG, 2018 XE, 2018 XB1
703Catalina Sky Survey (CSS) in Arizona, 117 in MPEC 2019-B60 -- 2018 XZ2, 2018 XH, 2018 XD, 2018 VN3, 2018 UZ, 2018 TC3, 2018 RL, 2018 PE22, 2016 OP5, 2015 YU7, 2015 XY378, 2014 XR6, 2014 JU54, 2013 VD13, 2013 TB80, 2012 MM11, 2011 OL5, 2010 GT7, 2010 AK, 2009 XV1, 2009 SV17, 2007 YQ56, 2005 YY36, 2003 NW1, 2002 XC91, 1998 YF10, 99799, 96590, 90403, 68346, 68216, 66272, 65706, 55532, 54401, 52387, 523806, 523641, 523604, 523603, 523587, 518735, 518635, 518463, 512245, 495615, 483472, 455550, 454177, 442742, 427643, 42286, 414960, 414903, 409204, 397847, 381677, 37336, 357022, 35107, 345705, 33342, 31345, 31210, 303174, 275611, 25916, 253106, 250697, 250162, 244670, 242147, 228502, 22753, 217807, 21088, 20790, 186822, 18109, 17274, 164120, 163902, 163818, 163693, 163081, 162004, 159857, 155110, 154656, 153415, 141498, 141079, 140928, 139359, 138937, 138859, 137805, 137802, 12538, 11398, 11311, 7482, 6456, 5879, 5797, 5751, 5131, 3552, 3288, 3200, 3199, 3103, 2212, 1865, 1627, 1620, 719
V06Catalina Sky Survey Kuiper Telescope in Arizona, 1 in MPEC 2019-B60 -- 2018 WY2
107Cavezzo Obs. in Italy, 1 in MPEC 2019-B60 -- 2018 XZ4
106Crni Vrh Obs. in Slovenia, 1 in MPEC 2019-B60 -- 2012 GS5
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 7 in MPEC 2019-B60 -- 2018 UY, 2018 US2, 2018 UQ2, 2018 RK7, 457212, 444627, 3288
006Fabra Obs. in Spain, 1 in MPEC 2019-B60 -- 523604
H15ISON New Mexico Obs. in New Mexico, 1 in MPEC 2019-B60 -- 2018 XL1
V01Mountainville Obs. in Utah, 1 in MPEC 2019-B60 -- 2018 XE
G96Mt. Lemmon Survey (MLS) in Arizona, 114 in MPEC 2019-B60 -- 2018 XJ2, 2018 XA, 2018 WX1, 2018 WU1, 2018 WR1, 2018 WO2, 2018 WM2, 2018 WK2, 2018 WH2, 2018 WA2, 2018 VW6, 2018 VW1, 2018 VT3, 2018 VG8, 2018 TX4, 2018 TS, 2018 TP2, 2018 TK2, 2018 RR7, 2018 NR, 2018 NB, 2018 MW6, 2018 LW5, 2018 LO6, 2018 KG1, 2018 GX4, 2017 KE35, 2016 RH18, 2016 JN34, 2016 CX264, 2015 XQ55, 2015 WY1, 2015 UC67, 2015 SF20, 2014 JU54, 2013 YZ13, 2012 GS5, 2011 XE1, 2011 WM46, 2010 XC11, 2009 SV17, 2008 WX32, 2006 UL217, 2001 WK15, 2001 VC2, 90075, 85938, 85867, 65803, 65706, 54401, 53426, 52761, 523823, 523811, 523805, 523788, 523604, 523587, 482054, 476904, 468005, 454100, 453563, 450238, 427643, 424482, 414903, 412995, 382825, 381677, 380476, 376864, 361532, 359592, 354182, 333521, 329390, 32906, 31345, 30825, 292220, 283729, 274855, 262623, 25143, 250162, 242216, 235086, 230111, 22771, 224926, 223456, 215188, 20460, 18109, 173664, 171819, 163252, 163051, 163000, 161995, 154656, 152742, 138937, 137052, 13553, 10302, 9058, 6050, 3288, 2061, 1943, 1862
C23Olmen Obs. in Belgium, 1 in MPEC 2019-B60 -- 2018 WH2
J43Oukaimeden Obs. in Morocco, 7 in MPEC 2019-B60 -- 2014 XR6, 523815, 31210, 215188, 138852, 137084, 100085
F51Pan-STARRS 1 (PS1) in Hawaii, 36 in MPEC 2019-B60 -- 2018 XY2, 2018 RU5, 2015 YU7, 2012 GS5, 2009 NA, 2006 OH15, 85804, 85275, 53426, 52762, 518463, 456618, 453729, 452314, 436654, 417419, 414903, 39796, 382825, 363076, 354663, 31210, 303174, 230979, 177016, 154007, 144411, 141498, 137925, 137802, 137084, 136635, 12538, 11398, 8507, 3671
F52Pan-STARRS 2 (PS2) in Hawaii, 8 in MPEC 2019-B60 -- 2005 GE60, 68346, 523631, 417581, 349068, 267759, 139359, 7480
104San Marcello Pistoiese Obs. in Italy, 4 in MPEC 2019-B60 -- 2018 XW, 2018 XV, 2018 XS, 2013 BT18
B74Santa Maria de Montmagastrell Obs. in Spain, 1 in MPEC 2019-B60 -- 2018 VF3
K96Savelli Obs., 1 in MPEC 2019-B60 -- 2018 XW
033Schwarzschild Obs. in Germany, 3 in MPEC 2019-B60 -- 2018 XG1, 2002 XQ90, 1998 YF10
691Spacewatch 0.9m telescope in Arizona, 3 in MPEC 2019-B60 -- 2018 WE1, 523628, 2340
I52Steward Obs. Mt. Lemmon Station in Arizona, 2 in MPEC 2019-B60 -- 2018 XO2, 2018 UN1
954Teide Obs. in the Canary Islands, 1 in MPEC 2019-B60 -- 2018 WA2
C51WISE in Earth polar orbit, 1 in MPEC 2019-B60 -- 2007 NL1
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 21 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
2018 WE1JPL Sentry17352074-207416.239e-10-9.74-9.740JPL: Computed at 08:38 today Pacific time based on 91 observations spanning 17.896 days (2018-Nov-26.46885 to 2018-Dec-14.36487). Diameter approximately 0.021 km. from weighted mean H=26.00.
2018 TBJPL Sentry1735R E M O V E DJPL: Risk listing removed at 1630 UTC today
2016 AZ193JPL Sentry17352019-21144962.1967075e-06-6.30-7.220JPL: 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 21 January '19

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

1840Generated Traffic Report
1735Noted that JPL Sentry has updated its 2016 AZ193 risk assessment - see above
Noted that JPL Sentry has removed 2018 TB as an impact risk - see above
Noted that JPL Sentry has updated its 2018 WE1 risk assessment - see above
Grabbed MPEC 2019-B60 - Daily Orbit Update - see above