Contents  on 23 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 23 January '18

Eleven objects reported inside ten LD

Eleven asteroids are reported inside ten lunar distances (LD) of our planet today. Nearest is risk-listed intruder 2018 BC, still inside Earth's sphere of gravitational influence (SOI) as it moves out from 1.80 to 2.27 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
0.10 LD Jan. 18 2018 BD 3 m  8.78 to 10.80 LD Jan. 13 - 23 intruder, NHATS target, exits ten LD, risk
0.73 LD Jan. 19 2018 BX 5 m  3.94 to 5.19 LD Jan. 12 - 27 intruder, NHATS target
0.73 LD Jan. 19 2018 BC 4 m  1.80 to 2.27 LD Dec. 30 - Feb. 9 intruder, NHATS target, inside Earth SOI, risk
1.19 LD Jan. 20 2018 BP3 6 m  4.63 to 6.16 LD Jan. 13 - 26 NEW - MPEC
3.02 LD tomorrow 2018 BA3 21 m  3.43 from 4.57 LD Jan. 19 - 30
3.06 LD Jan. 27 2018 BU1 42 m  8.70 from 11.11 LD today - Jan. 30 enters ten LD - DOU
4.14 LD Jan. 20 2018 BH3 30 m  6.72 to 8.44 LD Jan. 15 - 24 NEW - MPEC, DOU
4.64 LD today 2018 AJ 39 m  4.64 LD Jan. 16 - 30 NHATS target, Earth closest at 1224 UTC
6.7   LD Jan. 15* 2018 AV2 6 m  6.7 to 6.8 LD Nov. 9 - March 3 EPU +/- 11 mins.*, NHATS target, natural?
6.97 LD today 2018 AK12 31 m  6.97 LD Jan. 21 - 24 Earth closest at 0506 UTC
9.27 LD Jan. 27 2018 BQ 26 m  9.66 from 9.89 LD yesterday - Feb. 1 NHATS target

This report was generated at 1910 UTC with the discoveries of outbound objects 2018 BP3 (MPEC) and 2018 BH3 (MPEC, DOU), and departed intruder 2018 BF3 (MPEC, DOU), which passed the Moon at 1.07 LD on January 18th and Earth the next day at 0.63 LD. Today's DOU MPEC has follow-up for approaching 2018 AH12, inbound 2018 BU1, departed objects 2018 BB3, 2018 BW1, and 2017 XS (adding 12.92 days to what had been a 31.61-day observing arc), and distant 208023 1999 AQ10.

Approaching Traffic - sorted by 10-LD bubble entry date
Earth passage I D ~Size Distance today  Inside ten LD Notes
8.01 LD Jan. 26 2018 AL12 34 m  12.16 from 15.71 LD tomorrow - Jan. 27 risk
5.31 LD Feb. 4 2018 AH12 14 m  14.25 from 15.34 LD Jan. 28 - Feb. 12 NHATS target - DOU
3.7   LD Feb. 24* 2017 DR109 10 m  56.2 from 58.4 LD Feb. 18 - March 1 EPU +/- 30 mins.*, NHATS target
3.76 LD March 7 2017 VR12 269 m  57.31 from 58.60 LD Feb. 28 - March 13 radar/NHATS target
6.9   LD March 10* 2015 DK200 26 m  95.0 from 97.7 LD March 6 - 14 EPU +/- 23.45 hours*, NHATS target
* EPU = Earth passage uncertainty

Reading:  Phys.org has posted an Associated Press article about finding the first meteorites from the January 16th Michigan bolide (17th UTC). And a new science paper by Mike Brown and Bryan Butler about "Medium-sized satellites of large Kuiper belt objects" shows the massive new ALMA radio telescope in Chile being put to work on planetary science.



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. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.

NEOCP Activity  on 23 January '18

The MPC's NEO Confirmation Page has 91 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 91 objects listed. Of these, 52 were "one nighters." So far The Tracking News has counted a total of 133 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 23 January '18

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been 20 MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2018-B111 - "22:36 UT" - 2015 VD157


MPEC 2018-B110 - "22:33 UT" - 2015 KN167


MPEC 2018-B109 - "22:30 UT" - 2015 KM167


MPEC 2018-B108 - "22:27 UT" - 2015 KL167


MPEC 2018-B107 - "22:17 UT" - 2015 GY51


MPEC 2018-B106 - "16:34 UT" - 2018 BP3


MPEC 2018-B105 - "16:30 UT" - 2018 BO3


MPEC 2018-B104 - "16:27 UT" - 2018 BN3


MPEC 2018-B103 - "16:23 UT" - 2018 BM3


MPEC 2018-B102 - "16:20 UT" - 2018 BL3


MPEC 2018-B101 - "16:16 UT" - 2018 BK3


MPEC 2018-B100 - "15:41 UT" - Comet C/2018 A6 (Gibbs)


<< DOU on 23 Jan. '18 >>  MPEC 2018-B99 - "13:06 UT" - Daily Orbit Update


MPEC 2018-B98 - "11:46 UT" - 2003 OT13


MPEC 2018-B97 - "03:42 UT" - 2018 BF3


MPEC 2018-B96 - "03:39 UT" - 2018 BJ3


MPEC 2018-B95 - "03:36 UT" - 2018 BH3


MPEC 2018-B94 - "03:33 UT" - 2018 BG3


MPEC 2018-B93 - "03:29 UT" - 2018 BE3


MPEC 2018-B92 - "03:21 UT" - 2018 BD3

Observers  on 23 January '18

A total of 37 observers appear in today's MPECs.

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 1 in MPEC 2018-B97 -- 2018 BF3
T08ATLAS Mauna Loa in Hawaii, 11 in MPEC 2018-B99 -- 2015 BS509, 2009 BM2, 507366, 496818, 322763, 265196, 163691, 14402, 138013, 8567, 7977
C77Bernezzo Obs. in Italy, 1 in MPEC 2018-B95 -- 2018 BH3
Z84Calar Alto Schmidt in Spain, 1 in MPEC 2018-B100 -- C/2018 A6
703Catalina Sky Survey (CSS) in Arizona, 28 in MPECs 2018-B95, 2018-B97, 2018-B99 & 2018-B106 -- 2018 BP3, 2018 BH3, 2018 BG3, 2018 BF3, 2005 FL4, 96590, 504928, 504025, 475967, 459386, 36284, 337228, 281365, 228587, 208023, 177255, 17511, 16657, 154347, 152931, 137924, 137078, 137052, 6455, 6053, 1981, 1866, 1864
V06Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) in Arizona, 15 in MPEC 2018-B99 -- 2018 BZ2, 2018 BS, 2018 BQ1, 2018 BP, 2018 BK1, 2018 BB3, 2018 AY, 2018 AX, 2018 AO2, 2018 AM3, 2018 AK2, 2018 AE3, 2017 YZ, 2017 YC7, 2017 VB
309'Martin Altmann in Germany via Cerro Paranal in Chile, 1 in MPEC 2018-B99 -- 329669
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 10 in MPECs 2018-B99 & 2018-B101 -- 2018 BR, 2018 BK3, 2018 AK13, 2018 AH2, 2018 AG2, 2018 AE4, 2017 YZ1, 2017 YA8, 2017 XS, 2017 OH68
A77Chante-Perdrix Obs. in France, 1 in MPEC 2018-B100 -- C/2018 A6
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2018-B100 -- C/2018 A6
Z45Cosmos Obs., 1 in MPEC 2018-B99 -- 7977
106Crni Vrh Obs. in Slovenia, 1 in MPEC 2018-B100 -- C/2018 A6
595Farra d'Isonzo Obs. in Italy, 3 in MPECs 2018-B92, 2018-B95 & 2018-B100 -- 2018 BH3, 2018 BD3, C/2018 A6
H15ISON New Mexico Obs. in New Mexico, 1 in MPEC 2018-B99 -- 8567
H06#M. Suzuki in Japan via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2018-B97 -- 2018 BF3
Q621Hidetaka Sato in Japan via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2018-B100 -- C/2018 A6
Q62`Steven M. Tilley in Louisiana via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2018-B97 -- 2018 BF3
H01Magdalena Ridge Obs. (MRO) in New Mexico, 6 in MPECs 2018-B92, 2018-B93, 2018-B95, 2018-B97, 2018-B101 & 2018-B102 -- 2018 BL3, 2018 BK3, 2018 BH3, 2018 BF3, 2018 BE3, 2018 BD3
568@Jean-Marc Petit on Mauna Kea in Hawaii, 5 in MPECs 2018-B107, 2018-B108, 2018-B109, 2018-B110 & 2018-B111 -- 2015 VD157, 2015 KN167, 2015 KM167, 2015 KL167, 2015 GY51
568_Marco Micheli on Mauna Kea in Hawaii, 1 in MPEC 2018-B98 -- 2003 OT13
711McDonald Obs. in Texas, 1 in MPEC 2018-B100 -- C/2018 A6
G96Mt. Lemmon Survey (MLS) in Arizona, 29 in MPECs 2018-B92, 2018-B93, 2018-B94, 2018-B96, 2018-B99, 2018-B100, 2018-B101, 2018-B102, 2018-B103, 2018-B104, 2018-B105 & 2018-B106 -- 2018 BP3, 2018 BO3, 2018 BN3, 2018 BM3, 2018 BL3, 2018 BK3, 2018 BJ3, 2018 BG3, 2018 BE3, 2018 BD3, C/2018 A6, 2017 XV2, 2016 CW31, 2016 AU8, 2015 RL82, 2011 AW55, 2008 AX28, 2004 CK39, 53110, 496861, 457768, 444628, 39572, 349928, 258325, 164211, 154300, 137911, 2368
J43Oukaimeden Obs. in Morocco, 4 in MPEC 2018-B99 -- 2009 QL8, 439908, 162011, 143992
I41Palomar Transient Factory (PTF) in southern California, 13 in MPEC 2018-B99 -- 2004 VC17, 90075, 53319, 53110, 504928, 438017, 435302, 333888, 189173, 154589, 141670, 138205, 5189
F51Pan-STARRS 1 (PS1) in Hawaii, 6 in MPECs 2018-B94, 2018-B98, 2018-B99 & 2018-B100 -- 2018 BG3, C/2018 A6, 2003 OT13, 506732, 333908, 159399
K63Pascoli Obs. in Italy, 3 in MPECs 2018-B95, 2018-B97 & 2018-B100 -- 2018 BH3, 2018 BF3, C/2018 A6
104San Marcello Pistoiese Obs. in Italy, 2 in MPECs 2018-B92 & 2018-B95 -- 2018 BH3, 2018 BD3
H36Sandlot Obs. in Kansas, 1 in MPEC 2018-B100 -- C/2018 A6
204Schiaparelli Obs. in Italy, 5 in MPECs 2018-B92, 2018-B93, 2018-B95, 2018-B100 & 2018-B106 -- 2018 BP3, 2018 BH3, 2018 BE3, 2018 BD3, C/2018 A6
033Schwarzschild Obs. in Germany, 4 in MPECs 2018-B92, 2018-B94, 2018-B95 & 2018-B103 -- 2018 BM3, 2018 BH3, 2018 BG3, 2018 BD3
G40(program code "(" (17) via Slooh.com Canary Islands Obs. in the Canary Islands, 2 in MPECs 2018-B94 & 2018-B97 -- 2018 BG3, 2018 BF3
691Spacewatch 0.9m telescope in Arizona, 15 in MPECs 2018-B99 & 2018-B100 -- 2018 BS, 2018 BP, 2018 AP12, 2018 AM12, 2018 AH12, 2018 AF3, C/2018 A6, 2017 YO4, 2017 SV20, 2017 OP19, 2017 NU6, 2015 SY16, 2013 QH48, 2009 EV, 234145
291Spacewatch 1.8m telescope in Arizona, 14 in MPEC 2018-B99 -- 2018 BW1, 2018 AX, 2018 AB12, 2017 YC7, 2017 XN61, 2017 XC2, 2017 XC, 2017 UZ4, 2017 PJ26, 2015 AC45, 2014 WG365, 2014 VL6, 2014 BR8, 2008 EN6
I52Steward Obs. Mt. Lemmon Station in Arizona, 20 in MPECs 2018-B92, 2018-B93, 2018-B94, 2018-B95, 2018-B96, 2018-B97, 2018-B99, 2018-B100, 2018-B101, 2018-B102, 2018-B103, 2018-B104, 2018-B105 & 2018-B106 -- 2018 BZ2, 2018 BU1, 2018 BQ1, 2018 BP3, 2018 BP1, 2018 BP, 2018 BO3, 2018 BN3, 2018 BM3, 2018 BL3, 2018 BL1, 2018 BK3, 2018 BJ3, 2018 BH3, 2018 BG3, 2018 BF3, 2018 BE3, 2018 BD3, C/2018 A6, 2003 UO12
J22Tacande Obs. in the Canary Islands, 1 in MPEC 2018-B100 -- C/2018 A6
T14UH/Tholen NEO Follow-Up CFH Telescope in Hawaii, 1 in MPEC 2018-B99 -- 2017 UR51
L01Visnjan Obs., 5 in MPECs 2018-B92, 2018-B94, 2018-B96, 2018-B104 & 2018-B105 -- 2018 BO3, 2018 BN3, 2018 BJ3, 2018 BG3, 2018 BD3
718Wiggins Obs. in Utah, 1 in MPEC 2018-B95 -- 2018 BH3
C51WISE in Earth polar orbit, 4 in MPEC 2018-B99 -- 244977, 141670, 137062, 1627
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 23 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 BP3JPL Sentry19352115-211525.903e-06-7.42-7.610JPL: Computed at 11:05 today Pacific time based on 28 observations spanning 1.0068 days (2018-Jan-22.36003 to 2018-Jan-23.36687). Diameter approximately 0.006 km. from weighted mean H=28.66.
2018 BM3JPL Sentry18362101-211654.8805e-08-5.79-5.870JPL: Computed at 10:10 today Pacific time based on 16 observations spanning 3.9413 days (2018-Jan-19.45702 to 2018-Jan-23.39829). Diameter approximately 0.159 km. from weighted mean H=21.67.
2018 BL1JPL Sentry1650R E M O V E DJPL: Risk listing removed at 1634 UTC today
NEODyS16502104-210821.43e-10-9.18-9.260NEODyS: "Based on 16 optical observations (of which 0 are rejected as outliers) from 2018-01-16.417 to 2018-01-20.467."
2018 BH1NEODyS16502062-209548.4e-08-7.12-7.360NEODyS: "Based on 13 optical observations (of which 0 are rejected as outliers) from 2018-01-16.351 to 2018-01-21.466."
2018 BPJPL Sentry16502052-206862.22265e-07-4.52-4.850JPL: Computed at 07:59 today Pacific time based on 57 observations spanning 7.0095 days (2018-Jan-16.15431 to 2018-Jan-23.16378). Diameter approximately 0.260 km. from weighted mean H=20.55.
NEODyS16502056-211441.37e-09-6.81-6.880NEODyS: "Based on 46 optical observations (of which 7 are rejected as outliers) from 2018-01-16.155 to 2018-01-22.107."
2018 BCNEODyS16502089-2115141.45e-05-7.39-7.570NEODyS: "Based on 54 optical observations (of which 2 are rejected as outliers) from 2018-01-17.211 to 2018-01-20.504."
2018 AE4NEODyS1650209811.59e-09-8.80-8.80NEODyS: "Based on 38 optical observations (of which 5 are rejected as outliers) from 2018-01-13.463 to 2018-01-22.392."
2018 AE3JPL Sentry1650R E M O V E DJPL: Risk listing removed at 1551 UTC today
2017 UR51JPL Sentry1650R E M O V E DJPL: Risk listing removed at 1556 UTC today
2017 USNEODyS16502085-2115165.67e-04-4.19-4.20NEODyS: "Based on 121 optical observations (of which 4 are rejected as outliers) from 2017-10-16.346 to 2017-11-13.062."

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 23 January '18

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

2300Grabbed MPEC 2018-B110 - 2015 KN167 - see above
Grabbed MPEC 2018-B111 - 2015 VD157 - see above
2233Grabbed MPEC 2018-B107 - 2015 GY51 - see above
Grabbed MPEC 2018-B108 - 2015 KL167 - see above
Grabbed MPEC 2018-B109 - 2015 KM167 - see above
1935Noted that JPL Sentry has posted 2018 BP3 as an impact risk - see above
1910Generated Traffic Report
1836Noted that JPL Sentry has posted 2018 BM3 as an impact risk - see above
1650Noted that JPL Sentry has removed 2017 UR51 as an impact risk - see above
Noted that NEODyS has posted 2017 US as an impact risk - see above
Noted that JPL Sentry has removed 2018 AE3 as an impact risk - see above
Noted that NEODyS has updated its 2018 AE4 risk assessment - see above
Noted that NEODyS has updated its 2018 BC risk assessment - see above
Noted that NEODyS has updated its 2018 BH1 risk assessment - see above
Noted that JPL Sentry has removed 2018 BL1 as an impact risk - see above
Noted that NEODyS has updated its 2018 BL1 risk assessment - see above
Noted that JPL Sentry has updated its 2018 BP risk assessment - see above
Noted that NEODyS has updated its 2018 BP risk assessment - see above
Grabbed MPEC 2018-B98 - 2003 OT13 - see above
Grabbed MPEC 2018-B99 - Daily Orbit Update - see above
Grabbed MPEC 2018-B100 - Comet C/2018 A6 (Gibbs) - see above
Grabbed MPEC 2018-B101 - 2018 BK3 - see above
Grabbed MPEC 2018-B102 - 2018 BL3 - see above
Grabbed MPEC 2018-B103 - 2018 BM3 - see above
Grabbed MPEC 2018-B104 - 2018 BN3 - see above
Grabbed MPEC 2018-B105 - 2018 BO3 - see above
Grabbed MPEC 2018-B106 - 2018 BP3 - see above
0534Grabbed MPEC 2018-B92 - 2018 BD3 - see above
Grabbed MPEC 2018-B93 - 2018 BE3 - see above
Grabbed MPEC 2018-B94 - 2018 BG3 - see above
Grabbed MPEC 2018-B95 - 2018 BH3 - see above
Grabbed MPEC 2018-B96 - 2018 BJ3 - see above
Grabbed MPEC 2018-B97 - 2018 BF3 - see above