Contents  on 17 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 17 January '19

Thirteen objects reported inside ten LD

Thirteen minor objects are reported inside ten lunar distances (LD) of our home world today. The closest of these is risk-listed 2019 AG7, which is outbound from 4.24 to 5.01 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
2.56 LD Jan. 14 2019 AU6 16 m  5.95 to 7.81 LD Jan. 9 - 19 NHATS target, risk
2.99 LD Jan. 10 2019 AD 10 m  8.78 to 9.96 LD Jan. 2 - 18 NHATS target
3.14 LD Jan. 12 2019 AT13 14 m  5.84 to 6.88 LD Jan. 4 - 20 NEW - MPEC
3.46 LD Jan. 7 2019 AR7 15 m  9.35 to 10.22 LD Dec. 28 - today NHATS target, exits ten LD - DOU
3.92 LD Jan. 15 2019 AG7 28 m  4.24 to 5.01 LD Jan. 9 - 22 NHATS target, risk
5.60 LD Jan. 12 2018 YU2 18 m  7.43 to 8.13 LD Jan. 4 - 20 NHATS target
6.95 LD Jan. 23 2019 AS11 15 m  8.50 from 9.09 LD Jan. 15 - 30 NHATS target
7.45 LD Jan. 19 2019 AB5 27 m  8.00 from 8.66 LD Jan. 15 - 24
7.60 LD Jan. 13 2019 AR2 47 m  8.47 to 9.01 LD Jan. 7 - 19 NHATS target
7.64 LD yesterday 2019 AU9 15 m  7.67 to 7.85 LD Jan. 10 - 22 NHATS target
8.08 LD Jan. 15 2019 AT6 10 m  8.35 to 8.71 LD Jan. 10 - 20 NHATS target
8.62 LD Jan. 15 2019 AM8 14 m  9.21 to 10.33 LD Jan. 13 - 17 NHATS target, exits ten LD
9.69 LD yesterday 2019 AR8 26 m  9.70 to 9.96 LD Jan. 15 - 18 NHATS target

This report was generated at 2140 UTC with three discoveries announced yesterday of approaching 2019 AN12 (MPEC) and departed objects 2019 AH12 (MPEC), which flew by us at 6.26 LD on January 9th, and risk-listed 2019 AK12 (MPEC, DOU), which passed at 1.95 LD at 0732 UTC on January 13th. We also have two discoveries from today -- approaching 2019 AJ13 (MPEC) and outbound 2019 AT13 (MPEC). Today's DOU MPEC has follow-up for outbound 2019 AR7 and four departed objects: 2019 AU, 2018 YA1, and including risk-listed objects 2019 AQ2 and intruder 2019 AW2, plus astrometry from November for 163899 2003 SD220 and 68216 2001 CV26.

Approaching - sorted by 10-LD bubble entry date
7.6   LD Jan. 25* 2019 AJ13 8 m  12.2 from 13.3 LD Jan. 20 - 29 NEW, EPU +/- 5 mins.* - MPEC
8.6   LD Jan. 25* 2019 AG11 19 m  15.4 from 16.8 LD Jan. 22 - 28 EPU +/- 11 mins.*, risk
5.6   LD Jan. 26* 2019 AA10 26 m  19.3 from 21.4 LD Jan. 22 - 30 EPU +/- 8.72 hours*
9.1   LD Jan. 25* 2019 AN12 28 m  33.7 from 38.2 LD Jan. 24 - 25 NEW, EPU +/- 18 mins.* - 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 17 January '19

The MPC's NEO Confirmation Page has 82 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 82 objects listed. Of these, 41 were "one nighters." So far The Tracking News has counted a total of 126 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 17 January '19

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been 24 MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2019-B46 - "18:49 UT" - Comet P/2019 A6 (Lemmon-Panstarrs)


MPEC 2019-B45 - "17:58 UT" - Comet C/2019 A5 (Panstarrs)


MPEC 2019-B44 - "17:21 UT" - Comet P/2019 A4 (Panstarrs)


MPEC 2019-B43 - "16:57 UT" - 2019 AT13


MPEC 2019-B42 - "16:53 UT" - 2019 AM13


MPEC 2019-B41 - "16:48 UT" - 2019 BG


MPEC 2019-B40 - "16:44 UT" - 2019 BF


MPEC 2019-B39 - "16:40 UT" - 2019 AS13


MPEC 2019-B38 - "16:35 UT" - 2019 AR13


MPEC 2019-B37 - "16:31 UT" - 2019 AQ13


MPEC 2019-B36 - "16:26 UT" - 2019 AP13


MPEC 2019-B35 - "16:22 UT" - 2019 AO13


MPEC 2019-B34 - "16:17 UT" - 2019 AN13


MPEC 2019-B33 - "16:12 UT" - 2019 AL13


MPEC 2019-B32 - "16:06 UT" - 2019 AK13


MPEC 2019-B31 - "16:01 UT" - 2019 AJ13


MPEC 2019-B30 - "15:56 UT" - 2019 AH13


MPEC 2019-B29 - "15:51 UT" - 2019 AG13


MPEC 2019-B28 - "15:46 UT" - 2019 AF13


MPEC 2019-B27 - "15:41 UT" - 2019 AE13


MPEC 2019-B26 - "15:36 UT" - 2019 AD13


MPEC 2019-B25 - "15:30 UT" - 2019 AC13


<< DOU on 17 Jan. '19 >>  MPEC 2019-B24 - "13:07 UT" - Daily Orbit Update


MPEC 2019-B23 - "11:50 UT" - 2011 BM45

Observers  on 17 January '19

A total of 32 observers appear in today's MPECs.

CodeObserver / observatory
L2729PREMOTE Obs., 2 in MPECs 2019-B44 & 2019-B46 -- P/2019 A6, P/2019 A4
H21Astronomical Research Obs. Westfield in Illinois, 3 in MPECs 2019-B26, 2019-B27 & 2019-B28 -- 2019 AF13, 2019 AE13, 2019 AD13
T05ATLAS Haleakala in Hawaii, 31 in MPEC 2019-B24 -- 2019 AA9, 2018 VB9, 2014 YR43, 2009 SV17, 2007 NL1, 2002 VE68, 99799, 88263, 68216, 54660, 523587, 518463, 457260, 455550, 442742, 414903, 412995, 37336, 31345, 265661, 18736, 155110, 13553, 12538, 8566, 6456, 5646, 5143, 2061, 1943, 1916
T08ATLAS Mauna Loa in Hawaii, 33 in MPEC 2019-B24 -- 2002 VE68, 99799, 96536, 86324, 68216, 523805, 523631, 523604, 523587, 515767, 457260, 454177, 450779, 42286, 37336, 33342, 25916, 242147, 217807, 208617, 18736, 16816, 163899, 141079, 6178, 5131, 4954, 3552, 2340, 1943, 1627, 1620, 719
160Castelmartini Obs. in Italy, 12 in MPEC 2019-B24 -- 2018 XV, 2009 SV17, 2005 YY36, 90403, 523631, 381677, 31210, 275611, 152931, 137802, 7358, 5131
703Catalina Sky Survey (CSS) in Arizona, 45 in MPECs 2019-B24 & 2019-B43 -- 2019 AT13, 96590, 88263, 65706, 54401, 523610, 523604, 523595, 523587, 518735, 457260, 457212, 455550, 450779, 443923, 442742, 414960, 414903, 413002, 409204, 32906, 31210, 250162, 21088, 208617, 18736, 18109, 170891, 16816, 163081, 159495, 155334, 155110, 141498, 141079, 137802, 137032, 12538, 7358, 5131, 3552, 3288, 3200, 1916, 1620
V06Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) in Arizona, 5 in MPECs 2019-B24, 2019-B25, 2019-B26, 2019-B27 & 2019-B32 -- 2019 AK13, 2019 AE13, 2019 AD13, 2019 AC13, 2018 YA1
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 2 in MPECs 2019-B29 & 2019-B32 -- 2019 AK13, 2019 AG13
151Eschenberg Obs. in Switzerland, 1 in MPEC 2019-B24 -- 90403
J95Great Shefford Obs. in England, 1 in MPEC 2019-B36 -- 2019 AP13
K78Iota Scorpii Obs., 3 in MPEC 2019-B24 -- 2019 AA9, 2016 PT8, 2007 YU56
Q621Hidetaka Sato in Japan via iTelescope Obs. Siding Spring in New South Wales, 2 in MPECs 2019-B44 & 2019-B46 -- P/2019 A6, P/2019 A4
W85LCO Cerro Tololo A in Chile, 1 in MPEC 2019-B40 -- 2019 BF
W87LCO Cerro Tololo C in Chile, 2 in MPECs 2019-B23 & 2019-B39 -- 2019 AS13, 2011 BM45
K38M57 Obs. in Italy, 1 in MPEC 2019-B44 -- P/2019 A4
568^R. Wainscoat on Mauna Kea in Hawaii, 15 in MPECs 2019-B25, 2019-B26, 2019-B27, 2019-B28, 2019-B29, 2019-B30, 2019-B31, 2019-B33, 2019-B35, 2019-B37, 2019-B39, 2019-B42, 2019-B44, 2019-B45 & 2019-B46 -- 2019 AS13, 2019 AQ13, 2019 AO13, 2019 AM13, 2019 AL13, 2019 AJ13, 2019 AH13, 2019 AG13, 2019 AF13, 2019 AE13, 2019 AD13, 2019 AC13, P/2019 A6, C/2019 A5, P/2019 A4
474Mt. John Obs. in New Zealand, 1 in MPEC 2019-B29 -- 2019 AG13
G96Mt. Lemmon Survey (MLS) in Arizona, 57 in MPECs 2019-B24, 2019-B38, 2019-B41 & 2019-B46 -- 2019 BG, 2019 AR13, P/2019 A6, 2018 JD5, 2015 XQ55, 2015 MQ101, 2014 XR6, 2013 XH4, 2011 AA37, 2009 SV17, 2008 WT62, 2007 NL1, 2006 WR127, 2006 UL217, 2005 WF57, 90075, 85804, 65996, 65706, 54401, 53426, 52762, 523811, 523665, 523604, 457260, 457212, 454100, 444627, 424482, 419829, 414772, 413002, 397847, 382459, 354182, 34613, 325769, 30825, 304330, 25143, 226514, 173664, 171819, 170891, 16834, 162004, 155340, 155334, 141079, 141056, 5324, 3552, 3288, 3200, 1943, 1620
J69North Obs. in England, 1 in MPEC 2019-B24 -- 2016 AZ8
J43Oukaimeden Obs. in Morocco, 3 in MPEC 2019-B24 -- 155334, 153591, 3288
F51Pan-STARRS 1 (PS1) in Hawaii, 28 in MPECs 2019-B23, 2019-B24, 2019-B25, 2019-B26, 2019-B27, 2019-B28, 2019-B29, 2019-B30, 2019-B31, 2019-B32, 2019-B33, 2019-B34, 2019-B35, 2019-B36, 2019-B37, 2019-B38, 2019-B39, 2019-B40, 2019-B41, 2019-B42, 2019-B44, 2019-B45 & 2019-B46 -- 2019 BG, 2019 BF, 2019 AV4, 2019 AS13, 2019 AR13, 2019 AQ5, 2019 AQ13, 2019 AP13, 2019 AO13, 2019 AN13, 2019 AM13, 2019 AL13, 2019 AK13, 2019 AJ13, 2019 AH13, 2019 AG13, 2019 AF13, 2019 AE13, 2019 AD13, 2019 AC13, P/2019 A6, C/2019 A5, P/2019 A4, 2016 AO131, 2011 BM45, 2004 PX27, 204232, 185851
F52Pan-STARRS 2 (PS2) in Hawaii, 12 in MPECs 2019-B24, 2019-B34 & 2019-B43 -- 2019 AT13, 2019 AQ11, 2019 AN13, 2018 YJ2, 2018 YA3, 2018 XY2, 2018 XT2, 208617, 138175, 1981, 1863, 1620
6581Dave Balam via Plaskett 1.8m Telescope in British Columbia, 1 in MPEC 2019-B44 -- P/2019 A4
D29Purple Mtn. Obs. Xuyi Station in China, 1 in MPEC 2019-B24 -- 459462
C95SATINO-1 in France, 1 in MPEC 2019-B24 -- 99799
G40'program code "'" (16) via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-B24 -- 2018 XY2
G409B. Lutkenhoner in Germany via Slooh.com Canary Islands Obs. in the Canary Islands, 2 in MPECs 2019-B44 & 2019-B46 -- P/2019 A6, P/2019 A4
691Spacewatch 0.9m telescope in Arizona, 8 in MPECs 2019-B24, 2019-B30, 2019-B34, 2019-B36, 2019-B38, 2019-B44, 2019-B45 & 2019-B46 -- 2019 AR13, 2019 AP13, 2019 AN13, 2019 AH13, P/2019 A6, C/2019 A5, P/2019 A4, 2018 YU
291Spacewatch 1.8m telescope in Arizona, 9 in MPECs 2019-B24, 2019-B28, 2019-B29, 2019-B34 & 2019-B46 -- 2019 AU, 2019 AP8, 2019 AP11, 2019 AN13, 2019 AK12, 2019 AG13, 2019 AF13, P/2019 A6, 2018 YJ2
I52Steward Obs. Mt. Lemmon Station in Arizona, 32 in MPECs 2019-B24, 2019-B29, 2019-B30, 2019-B31, 2019-B33, 2019-B35, 2019-B36, 2019-B37, 2019-B38, 2019-B42, 2019-B43, 2019-B44, 2019-B45 & 2019-B46 -- 2019 AU, 2019 AT3, 2019 AT13, 2019 AS, 2019 AR7, 2019 AR5, 2019 AR13, 2019 AQ9, 2019 AQ13, 2019 AP6, 2019 AP13, 2019 AO7, 2019 AO13, 2019 AN6, 2019 AM5, 2019 AM13, 2019 AL13, 2019 AL11, 2019 AK11, 2019 AK10, 2019 AJ13, 2019 AH13, 2019 AH10, 2019 AG13, 2019 AF3, P/2019 A6, C/2019 A5, P/2019 A4, 2018 YS, 2018 YE2, 2018 XE20, 2005 WF57
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 6 in MPEC 2019-B24 -- 2019 AW2, 2019 AQ2, 2019 AO8, 2019 AC3, 2018 YW2, 2018 XG5
L01Visnjan Obs., 5 in MPECs 2019-B36, 2019-B41, 2019-B42, 2019-B44 & 2019-B46 -- 2019 BG, 2019 AP13, 2019 AM13, P/2019 A6, P/2019 A4
C51WISE in Earth polar orbit, 4 in MPECs 2019-B24 & 2019-B34 -- 2019 AN13, 523631, 42286, 194268
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 17 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 BFNEODyS1732211811.87e-10-9.11-9.11-NEODyS: "Based on 14 optical observations (of which 0 are rejected as outliers) from 2019-01-04.528 to 2019-01-17.172."
2019 AK12NEODyS17322113-211833.45e-07-7.86-7.86-NEODyS: "Based on 29 optical observations (of which 0 are rejected as outliers) from 2019-01-14.443 to 2019-01-17.406."
JPL Sentry16502113-211927.156e-07-7.55-7.720JPL: Computed at 08:14 today Pacific time based on 29 observations spanning 2.9626 days (2019-Jan-14.442192 to 2019-Jan-17.40482). Diameter approximately 0.011 km. from weighted mean H=27.53.
2019 AG12NEODyS17322091-209922.39e-07-6.31-6.310NEODyS: "Based on 12 optical observations (of which 0 are rejected as outliers) from 2019-01-11.529 to 2019-01-15.259."
2019 AP11NEODyS1650R E M O V E D-
JPL Sentry16502092-209225.001e-10-9.71-9.980JPL: Computed at 08:24 today Pacific time based on 12 observations spanning 5.8774 days (2019-Jan-11.584 to 2019-Jan-17.46143). Diameter approximately 0.030 km. from weighted mean H=25.25.
2019 AG11NEODyS1732211411.75e-10-10.75-10.750NEODyS: "Based on 17 optical observations (of which 0 are rejected as outliers) from 2019-01-11.304 to 2019-01-15.237."
2019 AO8NEODyS1650R E M O V E D-
2019 AC3NEODyS17322091-2118249.38e-05-5.52-5.55-NEODyS: "Based on 37 optical observations (of which 0 are rejected as outliers) from 2019-01-03.589 to 2019-01-15.518."
JPL Sentry16502091-2118100.00015271381-5.28-5.290JPL: Computed at 08:02 today Pacific time based on 37 observations spanning 11.929 days (2019-Jan-03.58822 to 2019-Jan-15.516979). Diameter approximately 0.012 km. from weighted mean H=27.24.
2019 AW2NEODyS1732207221.47e-06-5.94-5.960NEODyS: "Based on 35 optical observations (of which 0 are rejected as outliers) from 2019-01-03.476 to 2019-01-15.493."
JPL Sentry16502072-207221.957195e-06-5.80-5.800JPL: Computed at 07:57 today Pacific time based on 35 observations spanning 12.017 days (2019-Jan-03.47489 to 2019-Jan-15.49203). Diameter approximately 0.030 km. from weighted mean H=25.25.
2019 AQ2NEODyS17322090-211752.91e-07-7.24-7.50NEODyS: "Based on 59 optical observations (of which 0 are rejected as outliers) from 2019-01-03.330 to 2019-01-15.254."
JPL Sentry16502090-211331.1396e-07-7.63-7.840JPL: Computed at 08:04 today Pacific time based on 59 observations spanning 11.923 days (2019-Jan-03.32957 to 2019-Jan-15.252711). Diameter approximately 0.026 km. from weighted mean H=25.60.
2018 YW2NEODyS17322050-208151.04e-07-6.52-6.670NEODyS: "Based on 54 optical observations (of which 0 are rejected as outliers) from 2018-12-31.525 to 2019-01-15.547."
JPL Sentry16502050-208149.3814e-07-5.62-5.990JPL: Computed at 07:55 today Pacific time based on 54 observations spanning 15.022 days (2018-Dec-31.52399 to 2019-Jan-15.546008). Diameter approximately 0.054 km. from weighted mean H=23.97.
2018 XG5JPL Sentry1650R E M O V E DJPL: Risk listing removed at 1546 UTC today
NEODyS1650R 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 17 January '19

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

2140Generated Traffic Report
2017Grabbed MPEC 2019-B46 - Comet P/2019 A6 (Lemmon-Panstarrs) - see above
1901Grabbed MPEC 2019-B45 - Comet C/2019 A5 (Panstarrs) - see above
1802Grabbed MPEC 2019-B44 - Comet P/2019 A4 (Panstarrs) - see above
1732Noted that NEODyS has updated its 2018 YW2 risk assessment - see above
Noted that NEODyS has updated its 2019 AC3 risk assessment - see above
Noted that NEODyS has updated its 2019 AG11 risk assessment - see above
Noted that NEODyS has posted 2019 AG12 as an impact risk - see above
Noted that NEODyS has posted 2019 AK12 as an impact risk - see above
Noted that NEODyS has updated its 2019 AQ2 risk assessment - see above
Noted that NEODyS has updated its 2019 AW2 risk assessment - see above
Noted that NEODyS has posted 2019 BF as an impact risk - see above
Grabbed MPEC 2019-B42 - 2019 AM13 - see above
Grabbed MPEC 2019-B43 - 2019 AT13 - see above
1650Noted that JPL Sentry has removed 2018 XG5 as an impact risk - see above
Noted that NEODyS has removed 2018 XG5 as an impact risk - see above
Noted that JPL Sentry has updated its 2018 YW2 risk assessment - see above
Noted that JPL Sentry has updated its 2019 AC3 risk assessment - see above
Noted that JPL Sentry has updated its 2019 AK12 risk assessment - see above
Noted that NEODyS has removed 2019 AO8 as an impact risk - see above
Noted that JPL Sentry has updated its 2019 AP11 risk assessment - see above
Noted that NEODyS has removed 2019 AP11 as an impact risk - see above
Noted that JPL Sentry has updated its 2019 AQ2 risk assessment - see above
Noted that JPL Sentry has updated its 2019 AW2 risk assessment - see above
Grabbed MPEC 2019-B23 - 2011 BM45 - see above
Grabbed MPEC 2019-B24 - Daily Orbit Update - see above
Grabbed MPEC 2019-B25 - 2019 AC13 - see above
Grabbed MPEC 2019-B26 - 2019 AD13 - see above
Grabbed MPEC 2019-B27 - 2019 AE13 - see above
Grabbed MPEC 2019-B28 - 2019 AF13 - see above
Grabbed MPEC 2019-B29 - 2019 AG13 - see above
Grabbed MPEC 2019-B30 - 2019 AH13 - see above
Grabbed MPEC 2019-B31 - 2019 AJ13 - see above
Grabbed MPEC 2019-B32 - 2019 AK13 - see above
Grabbed MPEC 2019-B33 - 2019 AL13 - see above
Grabbed MPEC 2019-B34 - 2019 AN13 - see above
Grabbed MPEC 2019-B35 - 2019 AO13 - see above
Grabbed MPEC 2019-B36 - 2019 AP13 - see above
Grabbed MPEC 2019-B37 - 2019 AQ13 - see above
Grabbed MPEC 2019-B38 - 2019 AR13 - see above
Grabbed MPEC 2019-B39 - 2019 AS13 - see above
Grabbed MPEC 2019-B40 - 2019 BF - see above
Grabbed MPEC 2019-B41 - 2019 BG - see above