Contents  on 13 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 13 January '18

No objects reported inside ten LD

Looking back now, we can say that there was not a single moment in 2017 without at least one asteroid flying through our traffic reporting "bubble" with its arbitrary radius of ten lunar distances (LD) from Earth's center, but there were times when we didn't yet know this to be a fact. We are having a few days in that situation right now, with no transient natural objects confirmed to be within ten LD. In about three days 2018 AJ will enter the bubble.

This report was generated at 1840 UTC with follow-up in today's DOU MPEC for departed 2017 YH1 and distant 208023 1999 AQ10.



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 13 January '18

The MPC's NEO Confirmation Page has 68 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 68 objects listed. Of these, 37 were "one nighters." So far The Tracking News has counted a total of 89 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 13 January '18

Minor Planet Electronic Circulars

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


MPEC 2018-A56 - "22:23 UT" - 2018 AH2


MPEC 2018-A55 - "20:45 UT" - 2018 AP2


MPEC 2018-A54 - "20:41 UT" - 2018 AO2


MPEC 2018-A53 - "20:36 UT" - 2018 AN2


MPEC 2018-A52 - "20:32 UT" - 2018 AM2


MPEC 2018-A51 - "20:28 UT" - 2018 AL2


MPEC 2018-A50 - "20:24 UT" - 2018 AK2


MPEC 2018-A49 - "20:20 UT" - 2018 AJ2


MPEC 2018-A48 - "20:16 UT" - 2018 AG2


MPEC 2018-A47 - "20:12 UT" - 2018 AF2


MPEC 2018-A46 - "20:08 UT" - 2018 AE2


<< DOU on 13 Jan. '18 >>  MPEC 2018-A45 - "13:07 UT" - Daily Orbit Update

Observers  on 13 January '18

A total of 26 observers appear in today's MPECs.

CodeObserver / observatory
T05ATLAS Haleakala in Hawaii, 22 in MPECs 2018-A45 & 2018-A49 -- 2018 AJ2, 2017 YR1, 2017 YA6, 2015 YT9, 2009 QL8, 2007 AG, 2006 OC5, 2004 BB, 505667, 496818, 333888, 276703, 259802, 253841, 138013, 136923, 8567, 7977, 6050, 2202, 1980, 1627
T08ATLAS Mauna Loa in Hawaii, 18 in MPEC 2018-A45 -- 2017 YU3, 2016 AU8, 88188, 504928, 374851, 302311, 228587, 208023, 17511, 163696, 154347, 137924, 137062, 12711, 8037, 6053, 3122, 1580
160Castelmartini Obs. in Italy, 4 in MPECs 2018-A45 & 2018-A55 -- 2018 AP2, 2018 AF1, 2017 YP4, 2017 YN3
703Catalina Sky Survey (CSS) in Arizona, 32 in MPEC 2018-A45 -- 2018 AG, 2017 YN3, 2017 XV2, 2017 XH62, 2017 XB2, 2017 VX1, 2017 RH15, 2015 YR1, 2014 QW296, 2014 BS32, 1999 AF4, 88188, 85818, 68278, 53110, 507366, 496861, 496816, 439908, 306383, 27346, 262623, 259221, 190208, 174881, 172034, 17182, 162011, 143992, 137925, 136839, 1981
K51Celado Obs. in Italy, 1 in MPEC 2018-A54 -- 2018 AO2
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 2 in MPECs 2018-A48 & 2018-A56 -- 2018 AH2, 2018 AG2
G48Harlingten Research Obs. in New Mexico, 2 in MPEC 2018-A45 -- 2018 AG, 2016 AU8
H15ISON New Mexico Obs. in New Mexico, 1 in MPEC 2018-A45 -- 9950
K93LCO Sutherland C in South Africa, 1 in MPEC 2018-A48 -- 2018 AG2
H01Magdalena Ridge Obs. (MRO) in New Mexico, 3 in MPECs 2018-A51, 2018-A53 & 2018-A54 -- 2018 AO2, 2018 AN2, 2018 AL2
Z22MASTER IAC Obs. in the Canary Islands, 2 in MPEC 2018-A45 -- 505667, 36284
711McDonald Obs. in Texas, 10 in MPECs 2018-A45, 2018-A46, 2018-A47, 2018-A49, 2018-A50, 2018-A51, 2018-A52, 2018-A55 & 2018-A56 -- 2018 AP2, 2018 AM2, 2018 AL2, 2018 AK2, 2018 AJ2, 2018 AH2, 2018 AF2, 2018 AE2, 2017 YO6, 2017 YL6
G96Mt. Lemmon Survey (MLS) in Arizona, 35 in MPECs 2018-A45, 2018-A46, 2018-A52, 2018-A53, 2018-A54 & 2018-A55 -- 2018 AP2, 2018 AO2, 2018 AN2, 2018 AM2, 2018 AE2, 2017 YN3, 2017 YK5, 2017 YC2, 2017 XV2, 2017 UF52, 2017 SL2, 2016 CW31, 2015 XZ261, 2015 GF, 2014 YC15, 2011 AW55, 2008 AX28, 2003 CN17, 86326, 497096, 457768, 456973, 445775, 439908, 414429, 349928, 258325, 21374, 185853, 172034, 154300, 152742, 101873, 4450, 2368
J43Oukaimeden Obs. in Morocco, 2 in MPEC 2018-A45 -- 507366, 174881
F51Pan-STARRS 1 (PS1) in Hawaii, 37 in MPECs 2018-A45, 2018-A47, 2018-A48, 2018-A49, 2018-A50, 2018-A51, 2018-A52, 2018-A53, 2018-A54, 2018-A55 & 2018-A56 -- 2018 AP2, 2018 AO2, 2018 AN2, 2018 AM2, 2018 AL2, 2018 AK2, 2018 AJ2, 2018 AH2, 2018 AG2, 2018 AF2, 2017 UH44, 2017 SS19, 2017 QO17, 2017 QJ18, 2017 OA, 2017 NU6, 2015 EZ, 2014 YC15, 2007 AT2, 1998 WP7, 506859, 499490, 459046, 457768, 456536, 417217, 39572, 333888, 267221, 265187, 259802, 226514, 189700, 153311, 5863, 5836, 4450
K63Pascoli Obs. in Italy, 1 in MPEC 2018-A49 -- 2018 AJ2
204Schiaparelli Obs. in Italy, 2 in MPECs 2018-A49 & 2018-A55 -- 2018 AP2, 2018 AJ2
033Schwarzschild Obs. in Germany, 4 in MPECs 2018-A47, 2018-A49, 2018-A50 & 2018-A56 -- 2018 AK2, 2018 AJ2, 2018 AH2, 2018 AF2
W885M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Chile Obs. in Chile, 1 in MPEC 2018-A45 -- 2017 SR32
691Spacewatch 0.9m telescope in Arizona, 4 in MPEC 2018-A45 -- 2018 AU, 2017 YO4, 2013 OW2, 499490
291Spacewatch 1.8m telescope in Arizona, 5 in MPECs 2018-A45, 2018-A48, 2018-A50 & 2018-A56 -- 2018 AK2, 2018 AH2, 2018 AG2, 2009 CS5, 2009 CR5
V78Spirit Marsh Obs. in Minnesota, 1 in MPEC 2018-A45 -- 3122
I52Steward Obs. Mt. Lemmon Station in Arizona, 19 in MPECs 2018-A45, 2018-A46, 2018-A49, 2018-A50, 2018-A51, 2018-A53, 2018-A54, 2018-A55 & 2018-A56 -- 2018 AY, 2018 AX, 2018 AP2, 2018 AO2, 2018 AN2, 2018 AL2, 2018 AK2, 2018 AJ2, 2018 AH2, 2018 AG, 2018 AE2, 2017 YS3, 2017 YH1, 2017 YF7, 2017 YD8, 2017 YC7, 2017 XR61, 2017 XB2, 2017 VW13
926Tenagra II Obs. in Arizona, 8 in MPECs 2018-A45, 2018-A46, 2018-A47, 2018-A48, 2018-A49, 2018-A50, 2018-A53 & 2018-A56 -- 2018 AN2, 2018 AK2, 2018 AJ2, 2018 AH2, 2018 AG2, 2018 AF2, 2018 AE2, 2017 YS3
L01Visnjan Obs., 2 in MPECs 2018-A49 & 2018-A53 -- 2018 AN2, 2018 AJ2
C51WISE in Earth polar orbit, 4 in MPEC 2018-A45 -- 2017 UR7, 2000 YG29, 494975, 333888
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 13 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 AE2JPL Sentry22302094-2112113.035586e-07-4.11-4.500JPL: Computed at 13:53 today Pacific time based on 19 observations spanning 8.0224 days (2018-Jan-05.48148 to 2018-Jan-13.50387). Diameter approximately 0.321 km. from weighted mean H=20.10.
2018 AYJPL Sentry1700R E M O V E DJPL: Risk listing removed at 1632 UTC today
2017 YZ1NEODyS1700R E M O V E D-
2017 YD1NEODyS17002102-210821.64e-06-8.65-8.650NEODyS: "Based on 29 optical observations (of which 3 are rejected as outliers) from 2017-12-20.247 to 2017-12-30.252."
2017 VW13JPL Sentry17002097-209711.119e-09-7.08-7.080JPL: Computed at 07:56 today Pacific time based on 266 observations spanning 60.541 days (2017-Nov-13.64011 to 2018-Jan-13.18158). Diameter approximately 0.250 km. from weighted mean H=20.62.
2017 TW5NEODyS17002059-211784.85e-07-7.28-7.410NEODyS: "Based on 28 optical observations (of which 4 are rejected as outliers) from 2017-10-15.317 to 2017-10-17.177."
2017 FD3NEODyS17002053-207033.18e-08-8.73-8.850NEODyS: "Based on 37 optical observations (of which 1 are rejected as outliers) from 2017-03-19.440 to 2017-04-01.417."

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 13 January '18

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

2230Noted that JPL Sentry has posted 2018 AE2 as an impact risk - see above
Grabbed MPEC 2018-A56 - 2018 AH2 - see above
2100Grabbed MPEC 2018-A53 - 2018 AN2 - see above
Grabbed MPEC 2018-A54 - 2018 AO2 - see above
Grabbed MPEC 2018-A55 - 2018 AP2 - see above
2037Grabbed MPEC 2018-A46 - 2018 AE2 - see above
Grabbed MPEC 2018-A47 - 2018 AF2 - see above
Grabbed MPEC 2018-A48 - 2018 AG2 - see above
Grabbed MPEC 2018-A49 - 2018 AJ2 - see above
Grabbed MPEC 2018-A50 - 2018 AK2 - see above
Grabbed MPEC 2018-A51 - 2018 AL2 - see above
Grabbed MPEC 2018-A52 - 2018 AM2 - see above
1840Generated Traffic Report
1700Noted that NEODyS has updated its 2017 FD3 risk assessment - see above
Noted that NEODyS has updated its 2017 TW5 risk assessment - see above
Noted that JPL Sentry has updated its 2017 VW13 risk assessment - see above
Noted that NEODyS has updated its 2017 YD1 risk assessment - see above
Noted that NEODyS has removed 2017 YZ1 as an impact risk - see above
Noted that JPL Sentry has removed 2018 AY as an impact risk - see above
Grabbed MPEC 2018-A45 - Daily Orbit Update - see above