Contents  on 16 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 16 January '19

Fifteen objects reported inside ten LD

Bulletin - 1825 UTC:  Three new discoveries of close passers have been announced.

Earth passageI D~Size~Inside ten LDNotes
1.95 LD at 0734 UTC Jan. 132019 AK1211 m Jan. 10 - 16risk - MPEC
6.26 LD at 0912 UTC Jan. 92019 AH1215 m Jan. 6 - 12MPEC
9.14 LD at 0230 UTC Jan. 252019 AN1228 m Jan. 24 - 26MPEC


There are fifteen or maybe sixteen known asteroids that are less than ten lunar distances (LD) from Earth today. See our earlier bulletin above with three objects posted to JPL's Close Approach table but, at last check, not yet integrated into JPL Horizons, on which these daily traffic reports totally depend.

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  4.23 to 5.95 LD Jan. 9 - 19 NHATS target, risk
2.99 LD Jan. 10 2019 AD 10 m  7.63 to 8.78 LD Jan. 2 - 18 NHATS target
3.46 LD Jan. 7 2019 AR7 15 m  8.49 to 9.35 LD Dec. 28 - tomorrow NHATS target
3.92 LD yesterday 2019 AG7 28 m  3.92 to 4.24 LD Jan. 9 - 22 NHATS target, risk - DOU
4.13 LD Jan. 12 2019 AC9 24 m  8.29 to 10.32 LD Jan. 8 - 16 exits ten LD
4.87 LD Jan. 12 2019 AK3 13 m  9.26 to 11.37 LD Jan. 9 - 16 exits ten LD
5.60 LD Jan. 12 2018 YU2 18 m  6.81 to 7.43 LD Jan. 4 - 20 NHATS target
6.95 LD Jan. 23 2019 AS11 15 m  9.09 from 9.75 LD yesterday - Jan. 30 NHATS target
7.45 LD Jan. 19 2019 AB5 27 m  8.66 from 9.51 LD yesterday - Jan. 24
7.60 LD Jan. 13 2019 AR2 47 m  8.05 to 8.47 LD Jan. 7 - 19 NHATS target - DOU
7.64 LD today 2019 AU9 15 m  7.64 LD Jan. 10 - 22 NHATS target, Earth closest at 0941 UTC
7.76 LD Jan. 10 2013 YM2 22 m  9.63 to 10.23 LD Jan. 3 - 16 NHATS target, exits ten LD
8.08 LD yesterday 2019 AT6 10 m  8.14 to 8.35 LD Jan. 10 - 20 NHATS target
8.62 LD yesterday 2019 AM8 14 m  8.65 to 9.21 LD Jan. 13 - 17 NHATS target
9.69 LD today 2019 AR8 26 m  9.69 LD yesterday - Jan. 18 NHATS target, Earth closest at 2013 UTC

This report was generated at 2220 UTC with follow-up in today's DOU MPEC for approaching risk-listed 2019 AG11, outbound objects 2019 AR2 and risk-listed 2019 AG7, and departed 2013 VX4, plus astrometry from November for 2018 VB10, 2018 VO5, 2018 VZ4, 2018 UB3, and 2008 WS62. We also note radar astrometry posted for departed 163899 2003 SD220.

Approaching - sorted by 10-LD bubble entry date
8.6   LD Jan. 25* 2019 AG11 19 m  16.8 from 18.3 LD Jan. 22 - 28 EPU +/- 11 mins.*, risk - DOU
5.6   LD Jan. 26* 2019 AA10 26 m  21.4 from 23.6 LD Jan. 22 - 30 EPU +/- 8.72 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.

Radar Astrometry  on 16 January '19

Radar observation of two objects

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


Data update noted at 2200 UTC when the database was dated 16 Jan.


Data update noted at 2235 UTC when the database was dated 16 Jan.



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

NEOCP Activity  on 16 January '19

The MPC's NEO Confirmation Page has 98 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 98 objects listed. Of these, 37 were "one nighters." So far The Tracking News has counted a total of 117 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 16 January '19

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 2019-B22 - "15:23 UT" - 2019 AF12


MPEC 2019-B21 - "15:17 UT" - 2019 AO12


MPEC 2019-B20 - "15:11 UT" - 2019 AN12


MPEC 2019-B19 - "15:05 UT" - 2019 AM12


MPEC 2019-B18 - "15:00 UT" - 2019 AL12


MPEC 2019-B17 - "14:54 UT" - 2019 AK12


MPEC 2019-B16 - "14:48 UT" - 2019 AJ12


MPEC 2019-B15 - "14:43 UT" - 2019 AH12


MPEC 2019-B14 - "14:36 UT" - 2019 AG12


<< DOU on 16 Jan. '19 >>  MPEC 2019-B13 - "13:07 UT" - Daily Orbit Update


MPEC 2019-B12 - "12:34 UT" - 2014 QA33


MPEC 2019-B11 - "12:31 UT" - 2018 MV4


MPEC 2019-B10 - "12:28 UT" - 2018 LC3


MPEC 2019-B09 - "12:25 UT" - 2015 TY237


MPEC 2019-B08 - "12:22 UT" - 2015 SY2


MPEC 2019-B07 - "12:19 UT" - 2015 RV1


MPEC 2019-B06 - "12:17 UT" - 2015 HX176


MPEC 2019-B05 - "12:14 UT" - 2015 DJ198


MPEC 2019-B04 - "12:10 UT" - 2013 WT44


MPEC 2019-B03 - "12:06 UT" - 2013 ES89


MPEC 2019-B02 - "12:03 UT" - 2012 XF55


MPEC 2019-B01 - "04:29 UT" - 2017 LU

Observers  on 16 January '19

A total of 39 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 7 in MPEC 2019-B13 -- 2018 VZ4, 2018 VO5, 2018 UB3, 2018 RS1, 85938, 514914, 159560
T05ATLAS Haleakala in Hawaii, 7 in MPEC 2019-B13 -- 2019 AR2, 2019 AO10, 2015 YE21, 88263, 457260, 12538, 5131
T08ATLAS Mauna Loa in Hawaii, 5 in MPECs 2019-B13 & 2019-B17 -- 2019 AK12, 2018 XV, 2018 XT2, 2018 VZ9, 2016 AZ8
C77Bernezzo Obs. in Italy, 1 in MPEC 2019-B13 -- 2016 AZ8
703Catalina Sky Survey (CSS) in Arizona, 28 in MPEC 2019-B13 -- 2014 XR6, 2013 VD13, 2006 UL217, 90403, 65706, 55532, 523604, 523603, 523595, 523587, 481542, 457260, 454177, 450779, 42286, 422787, 414960, 349507, 275611, 242147, 16816, 159495, 141498, 137805, 3691, 3552, 3200, 1620
107Cavezzo Obs. in Italy, 1 in MPEC 2019-B13 -- 5131
K51Celado Obs. in Italy, 1 in MPEC 2019-B13 -- 2016 AZ8
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 8 in MPECs 2019-B13, 2019-B14, 2019-B15, 2019-B16 & 2019-B22 -- 2019 AV11, 2019 AU11, 2019 AJ12, 2019 AH12, 2019 AG12, 2019 AG11, 2019 AF12, 2019 AE11
B92Chinon Obs. in France, 1 in MPEC 2019-B13 -- 433
006Fabra Obs. in Spain, 2 in MPEC 2019-B13 -- 65733, 18109
595Farra d'Isonzo Obs. in Italy, 2 in MPECs 2019-B13 & 2019-B17 -- 2019 AK12, 2016 AZ8
203GiaGa Obs. in Italy, 3 in MPECs 2019-B13, 2019-B17 & 2019-B21 -- 2019 AO12, 2019 AK12, 2016 AZ8
253Goldstone DSS-14 70m antenna in southern California, 2 in radar -- 410088, 163899
J95Great Shefford Obs. in England, 1 in MPEC 2019-B17 -- 2019 AK12
W89LCO Cerro Tololo Aqawan A#1 in Chile, 1 in MPEC 2019-B13 -- 2012 CT
K30Luscherz Obs. in Switzerland, 1 in MPEC 2019-B13 -- 2016 AZ8
K38M57 Obs. in Italy, 4 in MPECs 2019-B13 & 2019-B21 -- 2019 AO12, 2019 AA9, 2018 XV, 2016 AZ8
C94MASTER-II Tunka in Russia, 2 in MPEC 2019-B13 -- 308127, 6178
568^R. Wainscoat on Mauna Kea in Hawaii, 7 in MPECs 2019-B13, 2019-B14, 2019-B16, 2019-B18, 2019-B19 & 2019-B20 -- 2019 AX11, 2019 AN12, 2019 AN11, 2019 AM12, 2019 AL12, 2019 AJ12, 2019 AG12
108Montelupo Obs. in Italy, 2 in MPEC 2019-B13 -- 2018 XV, 138937
474Mt. John Obs. in New Zealand, 1 in MPEC 2019-B15 -- 2019 AH12
G96Mt. Lemmon Survey (MLS) in Arizona, 10 in MPECs 2019-B13 & 2019-B15 -- 2019 AH12, 523628, 438429, 412995, 40263, 306595, 253062, 162168, 138852, 5751
J69North Obs. in England, 2 in MPEC 2019-B13 -- 2018 WC, 2008 WS62
Z80Northolt Branch Obs. in England, 3 in MPECs 2019-B13 & 2019-B17 -- 2019 AR2, 2019 AK12, 2016 AZ8
G34Oberfrauendorf Obs. in Germany, 1 in MPEC 2019-B13 -- 2008 WS62
C23Olmen Obs. in Belgium, 1 in MPEC 2019-B13 -- 2008 WS62
F51Pan-STARRS 1 (PS1) in Hawaii, 22 in MPECs 2019-B02, 2019-B03, 2019-B04, 2019-B05, 2019-B06, 2019-B07, 2019-B08, 2019-B09, 2019-B10, 2019-B11, 2019-B12, 2019-B13, 2019-B14, 2019-B16, 2019-B18, 2019-B19, 2019-B20, 2019-B21 & 2019-B22 -- 2019 AV6, 2019 AO12, 2019 AN12, 2019 AM12, 2019 AL12, 2019 AJ8, 2019 AJ12, 2019 AG12, 2019 AF12, 2018 YA3, 2018 MV4, 2018 LC3, 2015 TY237, 2015 SY2, 2015 RV1, 2015 HX176, 2015 DJ198, 2014 UC206, 2014 QA33, 2013 WT44, 2013 ES89, 2012 XF55
F52Pan-STARRS 2 (PS2) in Hawaii, 10 in MPEC 2019-B13 -- 2019 AH10, 2018 YD3, 2018 WV2, 2018 WK2, 2018 WC1, 2016 RH18, 2007 NL1, 37336, 194268, 138175
C95SATINO-1 in France, 1 in MPEC 2019-B13 -- 96315
204Schiaparelli Obs. in Italy, 2 in MPECs 2019-B17 & 2019-B21 -- 2019 AO12, 2019 AK12
033Schwarzschild Obs. in Germany, 4 in MPEC 2019-B13 -- 2019 AS, 2019 AC, 2018 YZ2, 2018 YA3
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2019-B13 -- 2013 VX4
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2019-B14 -- 2019 AG12
W34Squirrel Valley Obs. in North Carolina, 2 in MPEC 2019-B13 -- 480885, 1620
I52Steward Obs. Mt. Lemmon Station in Arizona, 7 in MPECs 2019-B13 & 2019-B15 -- 2019 AH12, 2018 YW, 2018 XH, 2018 VZ9, 2018 VB10, 2018 VA10, 2008 WS62
W33Transit Dreams Obs., 3 in MPEC 2019-B13 -- 2011 OL5, 2004 XP14, 1620
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 3 in MPECs 2019-B01 & 2019-B13 -- 2019 AZ8, 2019 AG7, 2017 LU
L01Visnjan Obs., 4 in MPECs 2019-B13, 2019-B17, 2019-B18 & 2019-B21 -- 2019 AO12, 2019 AL12, 2019 AK12, 2016 AZ8
C51WISE in Earth polar orbit, 8 in MPEC 2019-B13 -- 2011 XE, 96536, 523824, 523631, 445305, 42286, 139359, 12538
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 16 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 AK12JPL Sentry18322113-211931.0916e-06-7.37-7.750JPL: Computed at 08:29 today Pacific time based on 26 observations spanning 1.7448 days (2019-Jan-14.442192 to 2019-Jan-16.18697). Diameter approximately 0.011 km. from weighted mean H=27.54.
2019 AG12JPL Sentry18322091-209921.03986e-07-6.66-6.680JPL: Computed at 08:25 today Pacific time based on 12 observations spanning 3.7307 days (2019-Jan-11.52794 to 2019-Jan-15.2586). Diameter approximately 0.055 km. from weighted mean H=23.95.
2019 AP11NEODyS1810208314.49e-08-7.72-7.720NEODyS: "Based on 9 optical observations (of which 0 are rejected as outliers) from 2019-01-11.585 to 2019-01-15.009."
2019 AG11JPL Sentry18322114-211723.912e-08-8.37-8.640JPL: Computed at 08:25 today Pacific time based on 16 observations spanning 3.9334 days (2019-Jan-11.30301 to 2019-Jan-15.23636). Diameter approximately 0.019 km. from weighted mean H=26.22.
NEODyS1810211414.6e-11-11.34-11.340NEODyS: "Based on 14 optical observations (of which 0 are rejected as outliers) from 2019-01-11.304 to 2019-01-15.237."
2019 AZ8NEODyS1810R E M O V E D-
2019 AG7JPL Sentry18322064-206412.661e-09-8.86-8.860JPL: Computed at 08:21 today Pacific time based on 79 observations spanning 14.648 days (2018-Dec-31.614374 to 2019-Jan-15.262554). Diameter approximately 0.028 km. from weighted mean H=25.38.

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 16 January '19

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

2235Noted Radar Astrometry database update - see above
2220Updated Traffic Report
2200Noted Radar Astrometry database update - see above
1832Noted that JPL Sentry has updated its 2019 AG11 risk assessment - see above
Noted that JPL Sentry has posted 2019 AG12 as an impact risk - see above
Noted that JPL Sentry has updated its 2019 AG7 risk assessment - see above
Noted that JPL Sentry has posted 2019 AK12 as an impact risk - see above
1810Noted that NEODyS has posted 2019 AG11 as an impact risk - see above
Noted that NEODyS has posted 2019 AP11 as an impact risk - see above
Noted that NEODyS has removed 2019 AZ8 as an impact risk - see above
Grabbed MPEC 2019-B02 - 2012 XF55 - see above
Grabbed MPEC 2019-B03 - 2013 ES89 - see above
Grabbed MPEC 2019-B04 - 2013 WT44 - see above
Grabbed MPEC 2019-B05 - 2015 DJ198 - see above
Grabbed MPEC 2019-B06 - 2015 HX176 - see above
Grabbed MPEC 2019-B07 - 2015 RV1 - see above
Grabbed MPEC 2019-B08 - 2015 SY2 - see above
Grabbed MPEC 2019-B09 - 2015 TY237 - see above
Grabbed MPEC 2019-B10 - 2018 LC3 - see above
Grabbed MPEC 2019-B11 - 2018 MV4 - see above
Grabbed MPEC 2019-B12 - 2014 QA33 - see above
Grabbed MPEC 2019-B13 - Daily Orbit Update - see above
Grabbed MPEC 2019-B14 - 2019 AG12 - see above
Grabbed MPEC 2019-B15 - 2019 AH12 - see above
Grabbed MPEC 2019-B16 - 2019 AJ12 - see above
Grabbed MPEC 2019-B17 - 2019 AK12 - see above
Grabbed MPEC 2019-B18 - 2019 AL12 - see above
Grabbed MPEC 2019-B19 - 2019 AM12 - see above
Grabbed MPEC 2019-B20 - 2019 AN12 - see above
Grabbed MPEC 2019-B21 - 2019 AO12 - see above
Grabbed MPEC 2019-B22 - 2019 AF12 - see above
0438Grabbed MPEC 2019-B01 - 2017 LU - see above