Contents  on 14 January '18

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 14 January '18

Five objects reported inside ten LD

Today there are five Solar-System small bodies reported inside ten lunar distances (LD) of Earth, all of them newly announced. Nearest is 2018 AS2, which is within our planet's sphere of gravitational influence (SOI) and comes its closest to Earth on this passage, reaching 1.16 LD at 1117 UTC, and its closest to the Moon -- 1.10 LD at 2131 UTC. Further away, 2018 AU2 also comes its closest this time around, coming to 2.73 LD at 1216 UTC, risk-listed 2018 AT2 is outbound from 5.10 to 6.62 LD, risk-listed 2018 AV2 is slowly inbound from 6.7 to 6.6 LD*, and 2018 AJ3 leaves the ten-LD space, passing from 9.64 to 10.10 LD.

Earth passage I D ~Size Distance today  Inside ten LD Notes
1.16 LD today 2018 AS2 6 m  1.16 LD Jan. 8 - 20 NEW, Earth closest at 1117 UTC, Moon closest 1.10
LD at 2131 UTC - MPEC
1.83 LD Jan. 11 2018 AT2 10 m  5.10 to 6.62 LD Jan. 4 - 17 NEW, risk - MPEC, DOU
2.73 LD today 2018 AU2 11 m  2.73 LD Jan. 9 - 19 NEW, Earth closest at 1216 UTC - MPEC
6.6   LD Jan. 18* 2018 AV2 6 m  6.64 from 6.66 LD Nov. 16 - March 7 NEW, EPU > +/- ten days*, risk, natural? - MPEC, DOU
7.58 LD Jan. 5 2018 AJ3 9 m  9.64 to 10.10 LD Dec. 26 - today NEW, exits ten LD - MPEC
Approaching (sorted by 10-LD bubble entry date)
4.65 LD Jan. 23 2018 AJ 37 m  11.64 from 12.81 LD Jan. 16 - 30 NHATS target - DOU
3.7   LD Feb. 24* 2017 DR109 10 m  76.4 from 78.8 LD Feb. 18 - March 1 EPU +/- 30 mins.*, NHATS target
3.76 LD March 7 2017 VR12 271 m  69.05 from 70.38 LD Feb. 28 - March 13 radar/NHATS target
6.9   LD March 10* 2015 DK200 26 m  120.5 from 123.5 LD March 6 - 14 NEW, EPU +/- 23.45 hours*, NHATS target
* EPU = Earth passage uncertainty

This report was updated at 2253 UTC with the discovery of 2018 AJ3 (MPEC).
        Previously this report was updated at 1914 UTC with the discoveries of two more objects seen in the above active traffic table: 2018 AU2 (MPEC) and 2018 AV2 (MPEC, DOU), which Bill Gray describes to the Minor Planet Mailing List (MPML) as "likely lunar ejecta, maybe space junk." It will stay within ten LD until early March, which [along with the passage of 2017 VR12] overlaps with the return of 2015 DK200, now added to this reporting. Today's DOU MPEC has first follow-up for approaching 2018 AJ (7.34 days added to 1.72-day discovery arc) and just announced 2018 AT2, and continuing follow-up for departed 2017 YR3 and distant 208023 1999 AQ10.
        Your first neighborhood flying rocks traffic report was generated at 0514 UTC with the discoveries of 2018 AT2 (MPEC) and 2018 AS2 (MPEC).



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 come within ten LD since A/CC began these traffic reports (2007) but is not now so close. Object temporal distances are derived by A/CC from JPL Horizons data. "LD*" indicates some uncertainty in object passage time and distance. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.

NEOCP Activity  on 14 January '18

The MPC's NEO Confirmation Page has 81 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 81 objects listed. Of these, 54 were "one nighters." So far The Tracking News has counted a total of 108 listings on the NEOCP today.

New MPECs  on 14 January '18

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 2018-A78 - "21:10 UT" - 2018 AN3


MPEC 2018-A77 - "21:06 UT" - 2018 AM3


MPEC 2018-A76 - "21:02 UT" - 2018 AL3


MPEC 2018-A75 - "20:58 UT" - 2018 AK3


MPEC 2018-A74 - "20:55 UT" - 2018 AJ3


MPEC 2018-A73 - "20:51 UT" - 2018 AH3


MPEC 2018-A72 - "20:46 UT" - 2018 AG3


MPEC 2018-A71 - "20:41 UT" - 2018 AF3


MPEC 2018-A70 - "20:31 UT" - 2018 AE3


MPEC 2018-A69 - "20:18 UT" - 2015 RE36


MPEC 2018-A68 - "19:39 UT" - 2015 BS509


MPEC 2018-A67 - "19:16 UT" - 2014 KX99


MPEC 2018-A66 - "19:01 UT" - 2016 WC8


MPEC 2018-A65 - "18:59 UT" - 2013 VM13


<< DOU on 14 Jan. '18 >>  MPEC 2018-A64 - "13:19 UT" - Daily Orbit Update


MPEC 2018-A63 - "12:44 UT" - 2018 AV2


MPEC 2018-A62 - "12:40 UT" - 2018 AU2


MPEC 2018-A61 - "01:44 UT" - 2012 BN1


MPEC 2018-A60 - "01:42 UT" - 2018 AT2


MPEC 2018-A59 - "01:36 UT" - 2018 AS2


MPEC 2018-A58 - "01:25 UT" - 2018 AR2


MPEC 2018-A57 - "01:21 UT" - 2018 AQ2

Observers  on 14 January '18

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

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 1 in MPEC 2018-A70 -- 2018 AE3
T05ATLAS Haleakala in Hawaii, 17 in MPEC 2018-A64 -- 88188, 68278, 53110, 505667, 439908, 348314, 306383, 302311, 190208, 17511, 16657, 162038, 162011, 143992, 140039, 8037, 2368
T08ATLAS Mauna Loa in Hawaii, 11 in MPEC 2018-A64 -- 96189, 494975, 311554, 265196, 209924, 16834, 141484, 138847, 137084, 1685, 1036
Z84Calar Alto Schmidt in Spain, 1 in MPEC 2018-A58 -- 2018 AR2
160Castelmartini Obs. in Italy, 6 in MPECs 2018-A58, 2018-A62 & 2018-A64 -- 2018 AU2, 2018 AR2, 2018 AP2, 2018 AG, 2017 QL33, 1999 AF4
703Catalina Sky Survey (CSS) in Arizona, 50 in MPECs 2018-A57, 2018-A60, 2018-A64 & 2018-A74 -- 2018 AT2, 2018 AQ2, 2018 AJ3, 2018 AJ, 2017 YR1, 2017 YC8, 2017 TC4, 2017 QJ18, 2016 CL32, 2015 YT9, 2008 OP8, 2007 AG, 2006 OC5, 2004 BB, 2002 RN38, 96315, 85990, 85628, 53430, 53319, 505667, 497176, 496818, 440212, 333888, 322763, 265187, 259802, 25916, 253841, 163691, 162998, 162385, 162038, 154991, 153201, 152563, 14402, 138013, 137199, 136849, 136793, 11500, 100926, 7977, 6050, 5587, 2202, 1980, 1627
K51Celado Obs. in Italy, 3 in MPECs 2018-A58, 2018-A62 & 2018-A64 -- 2018 AU2, 2018 AR2, 2018 AN2
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 28 in MPECs 2018-A64, 2018-A67 & 2018-A68 -- 2018 AU, 2017 YZ1, 2017 YW4, 2017 YV5, 2017 YU7, 2017 YQ3, 2017 YB7, 2017 YA7, 2017 YA2, 2017 WS12, 2017 WR28, 2017 VU13, 2017 VT13, 2017 VL15, 2017 SS19, 2017 SR32, 2017 SB14, 2017 MW7, 2017 FJ90, 2015 XK351, 2015 BS509, 2015 AZ245, 2014 KX99, 2012 BV26, 2010 SA12, 2009 EV, 2006 OD7, 2005 GE60
595Farra d'Isonzo Obs. in Italy, 4 in MPECs 2018-A57, 2018-A58, 2018-A62 & 2018-A64 -- 2018 AU2, 2018 AR2, 2018 AQ2, 2018 AJ2
G48Harlingten Research Obs. in New Mexico, 1 in MPEC 2018-A64 -- 1999 AF4
H15ISON New Mexico Obs. in New Mexico, 2 in MPEC 2018-A64 -- 2016 CL32, 208023
K38M57 Obs. in Italy, 2 in MPEC 2018-A64 -- 2017 SO17, 2017 QL33
H01Magdalena Ridge Obs. (MRO) in New Mexico, 8 in MPECs 2018-A58, 2018-A61, 2018-A62, 2018-A63, 2018-A70, 2018-A73, 2018-A74 & 2018-A78 -- 2018 AV2, 2018 AU2, 2018 AR2, 2018 AN3, 2018 AJ3, 2018 AH3, 2018 AE3, 2012 BN1
711McDonald Obs. in Texas, 12 in MPECs 2018-A57, 2018-A58, 2018-A59, 2018-A61, 2018-A63, 2018-A70, 2018-A71, 2018-A73, 2018-A74, 2018-A76, 2018-A77 & 2018-A78 -- 2018 AV2, 2018 AS2, 2018 AR2, 2018 AQ2, 2018 AN3, 2018 AM3, 2018 AL3, 2018 AJ3, 2018 AH3, 2018 AF3, 2018 AE3, 2012 BN1
G96Mt. Lemmon Survey (MLS) in Arizona, 42 in MPECs 2018-A57, 2018-A58, 2018-A59, 2018-A61, 2018-A62, 2018-A63, 2018-A64, 2018-A72, 2018-A73, 2018-A74, 2018-A75, 2018-A76, 2018-A77 & 2018-A78 -- 2018 AV2, 2018 AU2, 2018 AS2, 2018 AR2, 2018 AQ2, 2018 AN3, 2018 AN2, 2018 AM3, 2018 AM2, 2018 AL3, 2018 AK3, 2018 AJ3, 2018 AH3, 2018 AG3, 2018 AG, 2017 PS30, 2015 RL82, 2014 QS439, 2013 XF22, 2012 DG61, 2012 BN1, 2009 WZ7, 2007 WB, 2004 CK39, 2003 YX1, 2000 YG29, 1999 AF4, 85839, 68278, 53110, 507366, 496861, 444628, 370061, 323179, 219527, 190208, 162011, 153349, 152889, 152680, 143992
F51Pan-STARRS 1 (PS1) in Hawaii, 24 in MPECs 2018-A57, 2018-A64, 2018-A65, 2018-A71, 2018-A74, 2018-A77 & 2018-A78 -- 2018 AQ2, 2018 AN3, 2018 AM3, 2018 AJ3, 2018 AF3, 2017 XV2, 2017 TC4, 2017 QL33, 2016 AR130, 2015 YT9, 2015 YR1, 2014 DT110, 2014 BS32, 2013 VM13, 2011 AW55, 96590, 65690, 504887, 456973, 337069, 162038, 154991, 136849, 4947
K63Pascoli Obs. in Italy, 3 in MPECs 2018-A58, 2018-A61 & 2018-A78 -- 2018 AR2, 2018 AN3, 2012 BN1
C95SATINO-1 in France, 1 in MPEC 2018-A64 -- 36284
204Schiaparelli Obs. in Italy, 7 in MPECs 2018-A58, 2018-A59, 2018-A61, 2018-A70, 2018-A74, 2018-A75 & 2018-A77 -- 2018 AS2, 2018 AR2, 2018 AM3, 2018 AK3, 2018 AJ3, 2018 AE3, 2012 BN1
G40(program code "(" (17) via Slooh.com Canary Islands Obs. in the Canary Islands, 2 in MPECs 2018-A57 & 2018-A61 -- 2018 AQ2, 2012 BN1
587Sormano Obs. in Italy, 1 in MPEC 2018-A62 -- 2018 AU2
691Spacewatch 0.9m telescope in Arizona, 7 in MPECs 2018-A64, 2018-A71 & 2018-A77 -- 2018 AV2, 2018 AM3, 2018 AF3, 2017 YQ3, 2017 XG2, 2017 RD15, 2016 GA222
291Spacewatch 1.8m telescope in Arizona, 5 in MPECs 2018-A64, 2018-A71 & 2018-A77 -- 2018 AM3, 2018 AF3, 2017 YS3, 2017 XC62, 499490
V78Spirit Marsh Obs. in Minnesota, 1 in MPEC 2018-A64 -- 3122
W34Squirrel Valley Obs. in North Carolina, 4 in MPEC 2018-A64 -- 2017 SO17, 53110, 439908, 154555
I52Steward Obs. Mt. Lemmon Station in Arizona, 24 in MPECs 2018-A58, 2018-A59, 2018-A60, 2018-A61, 2018-A62, 2018-A63, 2018-A64, 2018-A72, 2018-A73, 2018-A74, 2018-A75, 2018-A76 & 2018-A78 -- 2018 AV2, 2018 AU2, 2018 AT2, 2018 AS2, 2018 AR2, 2018 AN3, 2018 AL3, 2018 AK3, 2018 AJ3, 2018 AJ, 2018 AH3, 2018 AG3, 2017 YW5, 2017 YV7, 2017 YR3, 2017 YQ3, 2017 YG7, 2017 YF5, 2017 YE1, 2017 UZ42, 2017 QV34, 2012 DG61, 2012 BN1, 162361
J22Tacande Obs. in the Canary Islands, 1 in MPEC 2018-A60 -- 2018 AT2
926Tenagra II Obs. in Arizona, 3 in MPECs 2018-A68, 2018-A70 & 2018-A72 -- 2018 AG3, 2018 AE3, 2015 BS509
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2018-A66 -- 2016 WC8
T14UH/Tholen NEO Follow-Up CFH Telescope in Hawaii, 1 in MPEC 2018-A69 -- 2015 RE36
L01Visnjan Obs., 1 in MPEC 2018-A65 -- 2013 VM13
C51WISE in Earth polar orbit, 1 in MPEC 2018-A70 -- 2018 AE3
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 14 January '18

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 is 100 years from today and for NEODyS is usually the year 2090. Both also post impact solutions beyond 100 years for a few 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 AH3JPL Sentry23032090-211423.4668e-09-8.44-8.480JPL: Computed at 14:50 today Pacific time based on 25 observations spanning 1.9900 days (2018-Jan-12.27009 to 2018-Jan-14.260138). Diameter approximately 0.040 km. from weighted mean H=24.62.
2018 AE3JPL Sentry23032084-208416.977e-09-6.41-6.410JPL: Computed at 14:49 today Pacific time based on 23 observations spanning 3.7669 days (2018-Jan-10.30606 to 2018-Jan-14.073). Diameter approximately 0.200 km. from weighted mean H=21.13.
2018 AV2JPL Sentry17002051-2113100.001268185309-5.16-5.560JPL: Computed at 07:11 today Pacific time based on 24 observations spanning 1.0479 days (2018-Jan-13.32611 to 2018-Jan-14.37402). Diameter approximately 0.006 km. from weighted mean H=28.73.
2018 AT2JPL Sentry17002115-211513.080e-08-9.25-9.250JPL #2 for the day: Computed at 08:00 today Pacific time based on 21 observations spanning 2.0924 days (2018-Jan-12.34078 to 2018-Jan-14.43317). Diameter approximately 0.010 km. from weighted mean H=27.74.
NEODyS1700210314.47e-07-8.08-8.080NEODyS: "Based on 19 optical observations (of which 4 are rejected as outliers) from 2018-01-12.335 to 2018-01-13.488."
2018 AE2NEODyS17002094-2117153.01e-07-4.12-4.540NEODyS: "Based on 19 optical observations (of which 4 are rejected as outliers) from 2018-01-05.482 to 2018-01-13.505."
2017 YZ1JPL Sentry17002047-204711.521e-06-3.30-3.300JPL: Computed at 08:01 today Pacific time based on 69 observations spanning 20.148 days (2017-Dec-20.42481 to 2018-Jan-09.572745). Diameter approximately 0.290 km. from weighted mean H=20.37.
2016 AZ193JPL Sentry05042018-21145022.2136033e-06-6.17-6.860JPL: 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 14 January '18

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

2303Noted that JPL Sentry has posted 2018 AE3 as an impact risk - see above
Noted that JPL Sentry has posted 2018 AH3 as an impact risk - see above
2253Updated Traffic Report
2200Grabbed MPEC 2018-A76 - 2018 AL3 - see above
Grabbed MPEC 2018-A77 - 2018 AM3 - see above
Grabbed MPEC 2018-A78 - 2018 AN3 - see above
2100Grabbed MPEC 2018-A69 - 2015 RE36 - see above
Grabbed MPEC 2018-A70 - 2018 AE3 - see above
Grabbed MPEC 2018-A71 - 2018 AF3 - see above
Grabbed MPEC 2018-A72 - 2018 AG3 - see above
Grabbed MPEC 2018-A73 - 2018 AH3 - see above
Grabbed MPEC 2018-A74 - 2018 AJ3 - see above
Grabbed MPEC 2018-A75 - 2018 AK3 - see above
2000Grabbed MPEC 2018-A68 - 2015 BS509 - see above
1931Grabbed MPEC 2018-A67 - 2014 KX99 - see above
1905Grabbed MPEC 2018-A65 - 2013 VM13 - see above
Grabbed MPEC 2018-A66 - 2016 WC8 - see above
1700Noted that JPL Sentry has updated its 2017 YZ1 risk assessment - see above
Noted that NEODyS has posted 2018 AE2 as an impact risk - see above
Noted that JPL Sentry has updated its 2018 AT2 risk assessment - see above
Noted that NEODyS has posted 2018 AT2 as an impact risk - see above
Noted that JPL Sentry has posted 2018 AV2 as an impact risk - see above
Grabbed MPEC 2018-A62 - 2018 AU2 - see above
Grabbed MPEC 2018-A63 - 2018 AV2 - see above
Grabbed MPEC 2018-A64 - Daily Orbit Update - see above
0504Noted that JPL Sentry has updated its 2016 AZ193 risk assessment - see above
Noted that JPL Sentry has posted 2018 AT2 as an impact risk - see above
0215Grabbed MPEC 2018-A59 - 2018 AS2 - see above
Grabbed MPEC 2018-A60 - 2018 AT2 - see above
Grabbed MPEC 2018-A61 - 2012 BN1 - see above
0130Grabbed MPEC 2018-A57 - 2018 AQ2 - see above
Grabbed MPEC 2018-A58 - 2018 AR2 - see above