Contents  on 3 October '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 3 October '18

Nine objects reported inside ten LD

There are nine asteroidal objects reported within ten lunar distances (LD) of Earth today. Of these, the closest are risk-listed intruder 2018 SD2, departing from 5.30 to 5.96 LD, and 2018 SD3, outbound from 5.45 to 5.97 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
0.23 LD Sept. 25 2018 SD2 6 m  5.30 to 5.96 LD Sept. 10 - Oct. 10 intruder, NHATS target, risk
2.13 LD Sept. 30 2018 SP2 35 m  7.73 to 10.87 LD Sept. 27 - today exits ten LD
4.06 LD Sept. 24 2018 RQ1 51 m  6.81 to 7.37 LD Sept. 11 - Oct. 8 NHATS target
5.39 LD yesterday 2018 SD3 9 m  5.45 to 5.97 LD Sept. 27 - Oct. 7 NEW - MPEC
5.89 LD Sept. 30 2018 SE2 39 m  9.61 to 11.75 LD Sept. 26 - today exits ten LD - DOU
6.18 LD tomorrow 2018 SC3 21 m  6.22 from 6.69 LD Sept. 30 - Oct. 8 NEW - MPEC
6.36 LD Sept. 30 2018 SO2 23 m  7.60 to 8.65 LD Sept. 26 - Oct. 5 NHATS target
6.69 LD Oct. 8 2018 SG3 13 m  8.59 from 9.49 LD yesterday - Oct. 13 NEW - MPEC
6.79 LD Sept. 27 2018 SM1 89 m  9.61 to 10.51 LD Sept. 21 - today NHATS target, exits ten LD
Approaching Traffic - sorted by 10-LD bubble entry date
3.1   LD Oct. 17* 2014 US7 18 m  26.8 from 28.8 LD Oct. 12 - 22 EPU +/- 3.10 hours*, NHATS target
9.0   LD Oct. 15* 2018 SL3 33 m  36.4 from 39.4 LD Oct. 14 - 17 NEW, EPU +/- 58 mins.* - MPEC
8.7   LD Oct. 18* 2016 GC221 37 m  48.1 from 51.3 LD Oct. 17 - 20 EPU +/- 6.07 hours*
7.51 LD Oct. 29 475534 2006 TS7 195 m  106.61 from 110.96 LD Oct. 27 - 31
* EPU = Earth passage uncertainty

This report was generated at 1940 UTC with the discoveries of four objects: approaching 2018 SL3 (MPEC), inbound 2018 SC3 (MPEC) and 2018 SG3 (MPEC), and outbound 2018 SD3 (MPEC). Today's DOU MPEC has follow-up for outbound 2018 SE2 and departed 2018 SD1, and astrometry from last month for eight objects: 2018 RH3, 2018 RG3, 2018 RE3, 2018 RA1, 2018 RO, and including first additional observations of 2018 SL1 (0.33 days added to 3.48-day discovery arc), 2018 RF3 (0.77 days added to 0.99), and for the recovery of distant 2007 TV18 (0.28 days added to 0.02).


<< Reading:  The JAXA Hayabusa2 spacecraft has successfully deployed a third small lander to NEA 162173 Ryugu (1999 JU3). This is the European DLR/CNES MASCOT lander, which has its own Twitter feed.



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 eleven-plus 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 3 October '18

The MPC's NEO Confirmation Page has 61 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 61 objects listed. Of these, 40 were "one nighters." So far The Tracking News has counted a total of 79 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 3 October '18

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 2018-T43 - "23:14 UT" - 22 New Detached Objects


MPEC 2018-T42 - "22:06 UT" - 2014 UA225


MPEC 2018-T41 - "19:41 UT" - 22 New Scattering Objects


MPEC 2018-T40 - "18:37 UT" - 2015 KQ174


MPEC 2018-T39 - "18:05 UT" - Seven New Inner Classical Belt Objects


MPEC 2018-T38 - "17:02 UT" - 25 New Other Neptune-Resonant Objects


MPEC 2018-T37 - "14:37 UT" - Four New 4:3 Neptune-Resonant Objects


<< DOU on 3 Oct. '18 >>  MPEC 2018-T36 - "12:04 UT" - Daily Orbit Update


MPEC 2018-T35 - "01:34 UT" - 2018 SM3


MPEC 2018-T34 - "01:30 UT" - 2018 SL3


MPEC 2018-T33 - "01:27 UT" - 2018 SK3


MPEC 2018-T32 - "01:23 UT" - 2018 SJ3


MPEC 2018-T31 - "01:20 UT" - 2018 SH3


MPEC 2018-T30 - "01:16 UT" - 2018 SG3


MPEC 2018-T29 - "01:05 UT" - 2018 SE3


MPEC 2018-T28 - "00:50 UT" - 2018 SF3


MPEC 2018-T27 - "00:47 UT" - 2018 SD3


MPEC 2018-T26 - "00:43 UT" - 2018 SC3


MPEC 2018-T25 - "00:39 UT" - 2018 SB3


MPEC 2018-T24 - "00:22 UT" - 2018 TA


MPEC 2018-T23 - "00:18 UT" - 2018 SA3


MPEC 2018-T22 - "00:15 UT" - 2018 SZ2


MPEC 2018-T21 - "00:12 UT" - 2018 SY2


MPEC 2018-T20 - "00:09 UT" - 2018 SX2

Observers  on 3 October '18

A total of 40 observers appear in today's MPECs.

CodeObserver / observatory
L33Ananjev Obs. in Ukraine, 1 in MPEC 2018-T23 -- 2018 SA3
H21Astronomical Research Obs. Westfield in Illinois, 15 in MPECs 2018-T20, 2018-T21, 2018-T22, 2018-T23, 2018-T25, 2018-T26, 2018-T27, 2018-T28, 2018-T29, 2018-T30, 2018-T31, 2018-T32, 2018-T33, 2018-T34 & 2018-T35 -- 2018 SZ2, 2018 SY2, 2018 SX2, 2018 SM3, 2018 SL3, 2018 SK3, 2018 SJ3, 2018 SH3, 2018 SG3, 2018 SF3, 2018 SE3, 2018 SD3, 2018 SC3, 2018 SB3, 2018 SA3
T05ATLAS Haleakala in Hawaii, 25 in MPECs 2018-T23 & 2018-T36 -- 2018 SP1, 2018 SA3, 2018 NU3, 2015 RJ83, 2005 RB, 68359, 54789, 523670, 523641, 446791, 439313, 410088, 375505, 369986, 358744, 350988, 333889, 25916, 185702, 152952, 140333, 5751, 4401, 1916, 1627
T08ATLAS Mauna Loa in Hawaii, 21 in MPECs 2018-T23 & 2018-T36 -- 2018 SA3, 2018 RV5, 2018 RS1, 2018 NB, 2018 KE3, 2011 UA, 65733, 523788, 523631, 523619, 523604, 518635, 481542, 457260, 438429, 418929, 20790, 163818, 115052, 6456, 5143
C77Bernezzo Obs. in Italy, 2 in MPECs 2018-T23 & 2018-T26 -- 2018 SC3, 2018 SA3
160Castelmartini Obs. in Italy, 4 in MPEC 2018-T36 -- 86324, 68950, 12711, 105140
703Catalina Sky Survey in Arizona, 1 in MPEC 2018-T33 -- 2018 SK3
K51Celado Obs. in Italy, 1 in MPEC 2018-T26 -- 2018 SC3
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 14 in MPECs 2018-T29, 2018-T30, 2018-T35 & 2018-T36 -- 2018 SM3, 2018 SG3, 2018 SE3, 2018 SD1, 2018 RZ1, 2018 RY1, 2018 RR8, 2018 RN4, 2018 RE7, 2018 RB3, 2018 QY, 2018 PS24, 2018 NM4, 2018 JA
106Crni Vrh Obs. in Slovenia, 2 in MPECs 2018-T23 & 2018-T33 -- 2018 SK3, 2018 SA3
113Drebach Obs. in Germany, 1 in MPEC 2018-T26 -- 2018 SC3
595Farra d'Isonzo Obs. in Italy, 3 in MPECs 2018-T22, 2018-T23 & 2018-T26 -- 2018 SZ2, 2018 SC3, 2018 SA3
K88GINOP-KHK in Hungary, 5 in MPECs 2018-T20, 2018-T23, 2018-T26, 2018-T33 & 2018-T35 -- 2018 SX2, 2018 SM3, 2018 SK3, 2018 SC3, 2018 SA3
J95Great Shefford Obs. in England, 6 in MPECs 2018-T20, 2018-T23, 2018-T25, 2018-T26, 2018-T27 & 2018-T35 -- 2018 SX2, 2018 SM3, 2018 SD3, 2018 SC3, 2018 SB3, 2018 SA3
A35Hormersdorf Obs. in Germany, 1 in MPEC 2018-T23 -- 2018 SA3
C43Hoyerswerda Obs. in Germany, 1 in MPEC 2018-T26 -- 2018 SC3
Q66JAXA Janess-G in New South Wales, 1 in MPEC 2018-T36 -- 2018 SP1
695^Spacewatch via Kitt Peak Natl. Obs. in Arizona, 1 in MPEC 2018-T20 -- 2018 SX2
K38M57 Obs. in Italy, 1 in MPEC 2018-T23 -- 2018 SA3
C94MASTER-II Tunka in Russia, 1 in MPEC 2018-T36 -- 523788
568@Jean-Marc Petit on Mauna Kea in Hawaii, 82 in MPECs 2018-T37, 2018-T38, 2018-T39, 2018-T40, 2018-T41, 2018-T42 & 2018-T43 -- 2015 VZ167, 2015 VY167, 2015 VX167, 2015 VW167, 2015 VV167, 2015 VU167, 2015 VT167, 2015 VS167, 2015 VR167, 2015 VQ167, 2015 VP167, 2015 VO168, 2015 VO167, 2015 VN168, 2015 VN167, 2015 VM168, 2015 VM167, 2015 VL168, 2015 VL167, 2015 VK168, 2015 VJ168, 2015 VH168, 2015 VG168, 2015 VF168, 2015 VE168, 2015 VD168, 2015 VC168, 2015 VB168, 2015 VA168, 2015 RZ278, 2015 RY278, 2015 RX278, 2015 RW278, 2015 RV278, 2015 RU278, 2015 RT278, 2015 RS278, 2015 RR278, 2015 RQ278, 2015 RP278, 2015 RO278, 2015 RN278, 2015 RM278, 2015 RL278, 2015 RJ279, 2015 RH279, 2015 RG279, 2015 RF279, 2015 RE279, 2015 RD279, 2015 RC279, 2015 RB279, 2015 RA279, 2015 KZ174, 2015 KY174, 2015 KX174, 2015 KW174, 2015 KV174, 2015 KU174, 2015 KT174, 2015 KS174, 2015 KR174, 2015 KQ174, 2015 KP174, 2015 KO174, 2015 KN174, 2015 GZ55, 2015 GY55, 2015 GX55, 2015 GW55, 2015 GV55, 2015 GU55, 2015 GT55, 2015 GS55, 2015 GR55, 2015 GQ55, 2015 GP55, 2015 GD56, 2015 GC56, 2015 GB56, 2015 GA56, 2014 UA225
118Modra Obs. in Slovakia, 2 in MPECs 2018-T23 & 2018-T33 -- 2018 SK3, 2018 SA3
474Mt. John Obs. in New Zealand, 9 in MPECs 2018-T26, 2018-T27, 2018-T30 & 2018-T36 -- 2018 SP1, 2018 SN2, 2018 SN, 2018 SG3, 2018 SD3, 2018 SC3, 2018 RR8, 2018 RB8, 2009 HW44
G96Mt. Lemmon Survey (MLS) in Arizona, 12 in MPECs 2018-T20, 2018-T21, 2018-T25, 2018-T26, 2018-T27, 2018-T28, 2018-T29, 2018-T30, 2018-T31, 2018-T32, 2018-T34 & 2018-T35 -- 2018 SY2, 2018 SX2, 2018 SM3, 2018 SL3, 2018 SJ3, 2018 SH3, 2018 SG3, 2018 SF3, 2018 SE3, 2018 SD3, 2018 SC3, 2018 SB3
C47Nonndorf Obs. in Austria, 1 in MPEC 2018-T23 -- 2018 SA3
Z80Northolt Branch Obs. in England, 1 in MPEC 2018-T23 -- 2018 SA3
F52Pan-STARRS 2 (PS2) in Hawaii, 19 in MPECs 2018-T22, 2018-T24, 2018-T34 & 2018-T36 -- 2018 TA, 2018 SZ2, 2018 SN, 2018 SL3, 2018 RO7, 2018 RL2, 2018 QP, 2018 PL9, 523664, 523614, 523595, 490636, 481032, 443923, 256412, 217796, 163364, 144922, 5731
K63Pascoli Obs. in Italy, 5 in MPECs 2018-T22, 2018-T23, 2018-T26, 2018-T33 & 2018-T36 -- 2018 SZ2, 2018 SM3, 2018 SK3, 2018 SC3, 2018 SA3
K80Platanus Obs., 1 in MPEC 2018-T23 -- 2018 SA3
L04ROASTERR-1 in Romania, 1 in MPEC 2018-T23 -- 2018 SA3
104San Marcello Pistoiese Obs. in Italy, 2 in MPECs 2018-T20 & 2018-T23 -- 2018 SX2, 2018 SA3
H36Sandlot Obs. in Kansas, 1 in MPEC 2018-T25 -- 2018 SB3
C95SATINO-1 in France, 1 in MPEC 2018-T36 -- 66008
204Schiaparelli Obs. in Italy, 25 in MPECs 2018-T23 & 2018-T36 -- 2018 SL1, 2018 SE2, 2018 SA3, 2018 SA2, 2018 RY, 2018 RW3, 2018 RO7, 2018 RO, 2018 RM2, 2018 RH3, 2018 RG3, 2018 RF3, 2018 RE3, 2018 RE1, 2018 RD1, 2018 RC1, 2018 RA1, 2018 PS23, 2018 PK24, 2018 KR2, 2017 SN16, 2016 RO1, 2014 TG17, 2011 WM46, 2007 TV18
G40!M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2018-T36 -- 2018 RL
691Spacewatch 0.9m telescope in Arizona, 4 in MPECs 2018-T22, 2018-T25, 2018-T26 & 2018-T28 -- 2018 SZ2, 2018 SF3, 2018 SC3, 2018 SB3
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2018-T20 -- 2018 SX2
W34Squirrel Valley Obs. in North Carolina, 2 in MPECs 2018-T23 & 2018-T26 -- 2018 SC3, 2018 SA3
I52Steward Obs. Mt. Lemmon Station in Arizona, 10 in MPECs 2018-T20, 2018-T23, 2018-T25, 2018-T26, 2018-T27, 2018-T28, 2018-T29, 2018-T31, 2018-T32 & 2018-T34 -- 2018 SX2, 2018 SL3, 2018 SJ3, 2018 SH3, 2018 SF3, 2018 SE3, 2018 SD3, 2018 SC3, 2018 SB3, 2018 SA3
L01Visnjan Obs., 15 in MPECs 2018-T20, 2018-T22, 2018-T23, 2018-T24, 2018-T25, 2018-T26, 2018-T27, 2018-T28, 2018-T29, 2018-T30, 2018-T31, 2018-T32, 2018-T33, 2018-T34 & 2018-T35 -- 2018 TA, 2018 SZ2, 2018 SX2, 2018 SM3, 2018 SL3, 2018 SK3, 2018 SJ3, 2018 SH3, 2018 SG3, 2018 SF3, 2018 SE3, 2018 SD3, 2018 SC3, 2018 SB3, 2018 SA3
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 3 October '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 SK3JPL Sentry16002025-21181161.168257e-07-3.27-4.040JPL: Computed at 04:14 today Pacific time based on 25 observations spanning 2.7187 days (2018-Sep-30.3031 to 2018-Oct-03.021771). Diameter approximately 0.645 km. from weighted mean H=18.61.
2018 RY1JPL Sentry1600R E M O V E DJPL: Risk listing removed at 1436 UTC today
2016 JO38JPL Sentry16002020-21164549.29308800000001e-07-5.68-6.700JPL: Computed at 18:22 April 7th of 2017 Pacific time based on 15 observations spanning .96815 days (2016-May-03.29327 to 2016-May-04.26142). Diameter approximately 0.037 km. from weighted mean H=24.83.
2010 MA113JPL Sentry23582036-2118936.245833e-07-5.23-5.550JPL: Computed at 16:05 today Pacific time based on 18 observations spanning 1.4552 days (2010-Jun-25.53294 to 2010-Jun-26.988154). Diameter approximately 0.104 km. from weighted mean H=22.55.
2010 MY112JPL Sentry23582018-2090258.6854e-09-3.75-3.790JPL: Computed at 16:38 today Pacific time based on 16 observations spanning 1.3894 days (2010-Jun-23.744102 to 2010-Jun-25.133483). Diameter approximately 0.370 km. from weighted mean H=21.00.
2010 LJ68JPL Sentry23012020-2106181.67177e-08-6.09-6.340JPL: Computed at 15:34 today Pacific time based on 23 observations spanning 6.5838 days (2010-Jun-11.740367 to 2010-Jun-18.32412). Diameter approximately 0.082 km. from weighted mean H=23.09.
2010 JA43JPL Sentry23012019-21181018.58715e-08-4.23-4.320JPL: Computed at 15:22 today Pacific time based on 21 observations spanning 2.7122 days (2010-May-04.53905 to 2010-May-07.251222). Diameter approximately 0.161 km. from weighted mean H=21.60.
2010 GD37JPL Sentry22302019-2101318.1008e-09-3.14-3.380JPL: Computed at 15:18 today Pacific time based on 19 observations spanning 3.3331 days (2010-Apr-05.850035 to 2010-Apr-09.18316). Diameter approximately 1.261 km. from weighted mean H=17.16.
2010 CA55JPL Sentry22002021-203421.5262e-08-4.95-4.990JPL: Computed at 14:21 today Pacific time based on 38 observations spanning 4.1684 days (2010-Feb-04.718421 to 2010-Feb-08.88683). Diameter approximately 0.130 km. from weighted mean H=22.04.
2010 AU118JPL Sentry2358R E M O V E DJPL #2 for the day: Risk listing removed at 2313 UTC today

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 3 October '18

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

2358Noted that JPL Sentry has removed 2010 AU118 as an impact risk - see above
Noted that JPL Sentry has updated its 2010 MA113 risk assessment - see above
Noted that JPL Sentry has updated its 2010 MY112 risk assessment - see above
Grabbed MPEC 2018-T43 - 22 New Detached Objects - see above
2301Noted that JPL Sentry has updated its 2010 JA43 risk assessment - see above
Noted that JPL Sentry has updated its 2010 LJ68 risk assessment - see above
2230Noted that JPL Sentry has posted 2010 GD37 as an impact risk - see above
Grabbed MPEC 2018-T42 - 2014 UA225 - see above
2200Noted that JPL Sentry has updated its 2010 AU118 risk assessment - see above
Noted that JPL Sentry has updated its 2010 CA55 risk assessment - see above
2005Grabbed MPEC 2018-T41 - 22 New Scattering Objects - see above
1940Generated Traffic Report
1902Grabbed MPEC 2018-T39 - Seven New Inner Classical Belt Objects - see above
Grabbed MPEC 2018-T40 - 2015 KQ174 - see above
1732Grabbed MPEC 2018-T38 - 25 New Other Neptune-Resonant Objects - see above
1600Noted that JPL Sentry has updated its 2016 JO38 risk assessment - see above
Noted that JPL Sentry has removed 2018 RY1 as an impact risk - see above
Noted that JPL Sentry has posted 2018 SK3 as an impact risk - see above
Grabbed MPEC 2018-T36 - Daily Orbit Update - see above
Grabbed MPEC 2018-T37 - Four New 4:3 Neptune-Resonant Objects - see above
0402Grabbed MPEC 2018-T29 - 2018 SE3 - see above
Grabbed MPEC 2018-T30 - 2018 SG3 - see above
Grabbed MPEC 2018-T31 - 2018 SH3 - see above
Grabbed MPEC 2018-T32 - 2018 SJ3 - see above
Grabbed MPEC 2018-T33 - 2018 SK3 - see above
Grabbed MPEC 2018-T34 - 2018 SL3 - see above
Grabbed MPEC 2018-T35 - 2018 SM3 - see above
0103Grabbed MPEC 2018-T26 - 2018 SC3 - see above
Grabbed MPEC 2018-T27 - 2018 SD3 - see above
Grabbed MPEC 2018-T28 - 2018 SF3 - see above
0040Grabbed MPEC 2018-T23 - 2018 SA3 - see above
Grabbed MPEC 2018-T24 - 2018 TA - see above
Grabbed MPEC 2018-T25 - 2018 SB3 - see above
0017Grabbed MPEC 2018-T20 - 2018 SX2 - see above
Grabbed MPEC 2018-T21 - 2018 SY2 - see above
Grabbed MPEC 2018-T22 - 2018 SZ2 - see above