Contents  on 22 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 22 January '19

Eight objects reported inside ten LD

There are eight minor objects reported within ten lunar distances (LD) of our home world today. Closest is 2019 AS11, which is inbound from 7.02 to 6.95 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  9.88 to 11.54 LD Jan. 10 - 22 intruder, NHATS target, exits ten LD, risk
3.92 LD Jan. 15 2019 AG7 28 m  9.97 to 11.37 LD Jan. 9 - 22 NHATS target, exits ten LD
5.7   LD Jan. 26* 2019 AA10 26 m  9.3 from 11.2 LD today - Jan. 29 EPU +/- 6 mins.*, enters ten LD
6.95 LD tomorrow 2019 AS11 15 m  6.95 from 7.02 LD Jan. 15 - 30 NHATS target
7.45 LD Jan. 19 2019 AB5 27 m  8.05 to 8.72 LD Jan. 15 - 24
7.6   LD Jan. 25* 2019 AJ13 8 m  8.1 from 8.6 LD Jan. 20 - 29 EPU +/- 5 mins.*, NHATS target
7.64 LD Jan. 16 2019 AU9 15 m  9.91 to 10.67 LD Jan. 10 - 22 NHATS target, exits ten LD
8.59 LD Jan. 25 2019 AG11 19 m  9.57 from 10.43 LD today - Jan. 28 enters ten LD
* EPU = Earth passage uncertainty

This report was generated at 2348 UTC with the recovery of distant 171576 1999 VP11 in today's DOU MPEC along with follow-up for departed objects 2019 AR2 and risk-listed 2019 AQ2, plus astrometry from December for 2018 YM2, 2018 YK2, 2018 XS4, 2018 XC4, and 68216 2001 CV26.

Approaching
9.1   LD Jan. 25* 2019 AN12 28 m  13.2 from 16.8 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. "Distant" is used here to describe an object that has approached Earth within ten LD since A/CC began these traffic reports thirteen years ago but is not currently coming so close. 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 22 January '19

The MPC's NEO Confirmation Page has 74 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 74 objects listed. Of these, 38 were "one nighters."

New MPECs  on 22 January '19

Minor Planet Electronic Circulars

There was one MPEC posted this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


<< DOU on 22 Jan. '19 >>  MPEC 2019-B61 - "13:14 UT" - Daily Orbit Update

Observers  on 22 January '19

A total of 31 observers appeared in this day's MPEC.

CodeObserver / observatory
T05ATLAS Haleakala in Hawaii, 70 in MPEC 2019-B61 -- 2018 XV, 2018 VZ9, 2011 OL5, 99799, 96315, 90403, 89959, 86324, 65706, 54401, 523824, 523805, 523610, 523604, 518735, 518463, 480885, 459386, 458122, 457260, 457212, 455550, 442742, 424482, 414960, 414903, 410088, 380476, 36284, 31210, 308127, 265661, 250162, 242147, 21088, 208617, 20790, 18736, 18109, 173664, 17274, 170891, 16834, 163051, 162004, 159495, 155110, 141498, 141053, 140928, 138937, 137084, 12711, 12538, 11398, 100085, 7358, 6456, 6178, 5797, 5143, 5131, 3691, 3552, 3288, 3200, 2212, 2061, 1943, 1620
T08ATLAS Mauna Loa in Hawaii, 60 in MPEC 2019-B61 -- 2013 AV60, 99799, 88263, 68950, 68216, 66272, 65706, 54789, 523779, 523631, 523604, 523595, 523587, 488789, 458122, 455550, 454177, 442742, 418929, 414960, 412995, 37336, 345705, 33342, 325395, 31345, 31210, 308127, 277473, 25916, 242147, 217807, 217796, 21277, 20790, 186822, 18109, 180186, 155110, 140928, 138937, 137805, 12538, 5751, 5646, 5143, 5131, 4957, 4596, 4401, 4055, 3552, 2100, 1943, 1916, 1865, 1627, 1620, 1036, 719
069Baldone Obs. in Latvia, 1 in MPEC 2019-B61 -- 345705
160Castelmartini Obs. in Italy, 1 in MPEC 2019-B61 -- 433
703Catalina Sky Survey (CSS) in Arizona, 56 in MPEC 2019-B61 -- 2018 XZ4, 2018 XS4, 2018 XR, 2018 WA2, 2014 JU54, 2013 VD13, 2012 MM11, 2010 GT7, 2009 SV17, 2007 YQ56, 68216, 65706, 523811, 523631, 523610, 523604, 523587, 518735, 512245, 483472, 476904, 459458, 454177, 454101, 454100, 450238, 42286, 422787, 414960, 37336, 33342, 25916, 228502, 217796, 20790, 18736, 18109, 16834, 164120, 163818, 163693, 159495, 154656, 141484, 139359, 137805, 7482, 5332, 3552, 3200, 3199, 3103, 2212, 1916, 1863, 1620
107Cavezzo Obs. in Italy, 1 in MPEC 2019-B61 -- 2018 XS4
B24Cesson Obs. in France, 2 in MPEC 2019-B61 -- 2009 SV17, 433
006Fabra Obs. in Spain, 2 in MPEC 2019-B61 -- 2003 NW1, 523604
E89Geyserland Obs. in New Zealand, 1 in MPEC 2019-B61 -- 523824
J81Guirguillano Obs. in Spain, 1 in MPEC 2019-B61 -- 2018 YM2
H15ISON New Mexico Obs. in New Mexico, 3 in MPEC 2019-B61 -- 65706, 523604, 18109
H06|Hidetaka Sato in Japan via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2019-B61 -- 2018 YV
695^Spacewatch via Kitt Peak Natl. Obs. (KPNO) in Arizona, 3 in MPEC 2019-B61 -- 2019 AQ2, 2019 AP6, 2018 VW6
950.EURONEAR via La Palma in the Canary Islands, 1 in MPEC 2019-B61 -- 2017 KE35
V37LCO McDonald Obs. in Texas, 1 in MPEC 2019-B61 -- 2019 AV2
G96Mt. Lemmon Survey (MLS) in Arizona, 62 in MPEC 2019-B61 -- 2018 XZ1, 2018 XS3, 2018 XH, 2018 XC4, 2018 VN3, 2018 VE4, 2018 UZ, 2018 TC3, 2015 YE21, 2014 AA33, 2011 OL5, 2005 YY36, 2001 VC2, 99935, 65706, 54401, 52387, 523811, 523806, 523779, 523628, 523610, 523587, 509505, 481025, 423100, 422787, 420591, 417581, 397847, 381677, 352102, 345705, 33342, 318411, 275611, 265661, 262623, 25916, 231134, 229672, 212359, 21088, 20790, 204232, 16834, 164120, 163902, 162741, 154656, 138925, 138852, 138175, 137084, 137062, 6456, 5797, 5751, 4055, 3691, 2329, 1865
J69North Obs. in England, 1 in MPEC 2019-B61 -- 2019 AV2
Z80Northolt Branch Obs. in England, 1 in MPEC 2019-B61 -- 2018 XV
J43Oukaimeden Obs. in Morocco, 19 in MPEC 2019-B61 -- 2018 GX4, 2012 MM11, 2005 YY36, 99935, 96315, 413002, 345705, 25143, 250162, 231134, 208617, 18109, 162004, 141053, 6178, 5797, 3288, 3200, 1862
F51Pan-STARRS 1 (PS1) in Hawaii, 75 in MPEC 2019-B61 -- 2018 VC5, 2016 VG2, 2016 NN39, 2016 CS29, 2016 CA136, 2015 XC1, 2015 HV171, 2014 YN44, 2011 HE24, 2009 TK8, 2009 NA, 2006 KD40, 2006 AL3, 2004 BY21, 2003 AO4, 2002 LE31, 2001 VC2, 96744, 90075, 85938, 85804, 68346, 523815, 481025, 458452, 455736, 420262, 419829, 418929, 418900, 410088, 397847, 382459, 357621, 357022, 355256, 345705, 331963, 31210, 285638, 283457, 26166, 255501, 253106, 238063, 212359, 20826, 204232, 19764, 189263, 185851, 175114, 171576, 163081, 161995, 159495, 155340, 153243, 144411, 138925, 138852, 137924, 137062, 137052, 11311, 6456, 6178, 5587, 5131, 3671, 3552, 2368, 2329, 1863, 1620
F52Pan-STARRS 2 (PS2) in Hawaii, 13 in MPEC 2019-B61 -- 99799, 68346, 66272, 523603, 285540, 283729, 231134, 230111, 21088, 163023, 13553, 9058, 1943
D29Purple Mtn. Obs. Xuyi Station in China, 2 in MPEC 2019-B61 -- 506459, 1627
K61Rokycany Obs. in the Czech Republic, 3 in MPEC 2019-B61 -- 2019 AW7, 2019 AR2, 2018 XV
619Sabadell Obs. in Spain, 1 in MPEC 2019-B61 -- 454177
C95SATINO-1 in France, 2 in MPEC 2019-B61 -- 138937, 138852
033Schwarzschild Obs. in Germany, 5 in MPEC 2019-B61 -- 2018 XY5, 2018 XX5, 2018 XD5, 2018 XC5, 2018 XA5
691Spacewatch 0.9m telescope in Arizona, 3 in MPEC 2019-B61 -- 21088, 173664, 6178
I52Steward Obs. Mt. Lemmon Station in Arizona, 3 in MPEC 2019-B61 -- 2018 XX4, 2018 XA5, 2002 XQ90
J22Tacande Obs. in the Canary Islands, 2 in MPEC 2019-B61 -- 2018 YK2, 2018 YJ2
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPEC 2019-B61 -- 2018 XQ4, 2018 WN
C51WISE in Earth polar orbit, 3 in MPEC 2019-B61 -- 2019 AN13, 2018 VQ9, 89959
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 22 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
2019 AQ2JPL Sentry17002090-211331.0775e-07-7.66-7.870JPL: Computed at 08:25 today Pacific time based on 62 observations spanning 17.875 days (2019-Jan-03.32957 to 2019-Jan-21.20445). Diameter approximately 0.026 km. from weighted mean H=25.60.
NEODyS17002090-211762.75e-07-7.27-7.50NEODyS: "Based on 62 optical observations (of which 0 are rejected as outliers) from 2019-01-03.330 to 2019-01-21.205."
2018 WE1NEODyS17002063-209672.49e-07-7.10-7.380NEODyS: "Based on 93 optical observations (of which 2 are rejected as outliers) from 2018-11-26.470 to 2018-12-14.366."
2018 TBNEODyS1700210311.75e-06-6.00-6.00NEODyS: "Based on 200 optical observations (of which 1 are rejected as outliers) from 2018-10-02.423 to 2018-11-19.459."

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 22 January '19

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

2348Generated Traffic Report
1700Noted that NEODyS has updated its 2018 TB risk assessment - see above
Noted that NEODyS has updated its 2018 WE1 risk assessment - see above
Noted that JPL Sentry has updated its 2019 AQ2 risk assessment - see above
Noted that NEODyS has updated its 2019 AQ2 risk assessment - see above
Grabbed MPEC 2019-B61 - Daily Orbit Update - see above