Contents  on 19 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 19 January '18

Nine objects reported inside ten LD

Nine minor objects are known to be within ten lunar distances (LD) of Earth today, and three of these over the course of the day are inside the Earth-Moon system, though no more than two at one time. Risk-listed 2018 BD began the day at 0.72 LD, after passing us at 0.102 LD yesterday, and moves out to 2.74 LD after flying by the Moon at 0.48 LD at 0238 UTC. And both newly announced 2018 BX and risk-listed 2018 BC come to a similar distance today: 0.73 LD at 2259 and 2022 UTC respectively.

Earth passage I D ~Size Distance today  Inside ten LD Notes
0.10 LD yesterday 2018 BD 3 m  0.72 to 2.74 LD Jan. 13 - 23 intruder today, Moon closest 0.48 LD at 0238 UTC, risk
0.43 LD Jan. 15 2018 BW 8 m  5.00 to 6.47 LD Jan. 8 - 22 intruder
0.73 LD today 2018 BX 5 m  0.73 LD Jan. 12 - 27 NEW, intruder today, Earth closest at 2259 UTC - MPEC, DOU
0.73 LD today 2018 BC 5 m  0.73 LD Dec. 30 - Feb. 9 intruder today, NHATS target, Earth closest at 2022 UTC, risk - DOU
1.16 LD Jan. 14 2018 AS2 6 m  7.82 to 9.51 LD Jan. 8 - 20 NHATS target
1.40 LD Jan. 17 2018 AG4 22 m  3.50 to 5.44 LD Jan. 12 - 22 NHATS target
2.73 LD Jan. 14 2018 AU2 11 m  9.71 to 11.70 LD Jan. 9 - 19 exits ten LD
4.64 LD Jan. 23 2018 AJ 40 m  6.39 from 7.31 LD Jan. 16 - 30 NHATS target
6.7   LD Jan. 15* 2018 AV2 6 m  6.7 to 6.7 LD Nov. 9 - March 2 EPU +/- 14 mins.*, NHATS target, natural? - DOU

This report was updated at 2042 UTC with the recovery of distant 2014 EY24 (MPEC). Your first local asteroid traffic report was generated at 1846 UTC with the discovery of intruder 2018 BX (MPEC, DOU), and with first follow-up for passing risk-listed intruder 2018 BC in today's DOU MPEC along with continuing follow-up for slowly outbound 2018 AV2 and the recovery of distant 2012 OQ.

Approaching (sorted by 10-LD bubble entry date)
6.96 LD Jan. 23 2018 AK12 29 m  17.55 from 22.25 LD Jan. 21 - 24
9.27 LD Jan. 27 2018 BQ 26 m  10.86 from 11.26 LD Jan. 22 - Feb. 1
8.0   LD Jan. 26* 2018 AL12 34 m  27.8 from 32.0 LD Jan. 24 - 27 EPU +/- 6 mins.*
5.3   LD Feb. 4* 2018 AH12 14 m  18.7 from 19.9 LD Jan. 28 - Feb. 12 EPU +/- 21 mins.*, NHATS target
3.7   LD Feb. 24* 2017 DR109 10 m  64.9 from 67.1 LD Feb. 18 - March 1 EPU +/- 30 mins.*, NHATS target
3.76 LD March 7 2017 VR12 271 m  62.49 from 63.79 LD Feb. 28 - March 13 radar/NHATS target
6.9   LD March 10* 2015 DK200 26 m  105.9 from 108.8 LD March 6 - 14 EPU +/- 23.45 hours*, NHATS target
* EPU = Earth passage uncertainty

Reading:  As CNET noted yesterday, there have been "overheated headlines" in the media recently about the approach of 2002 AJ129. NASA/JPL has a response to that today, explaining that this object and its passage (10.95 LD on February 4th) are interesting but not threatening.
        Spaceflight Now has a wrap-up on the progress of two sample-return missions that will visit near-Earth asteroids this year -- JAXA's Hayabusa 2 to 162173 Ryugu (1999 JU3) and NASA's OSIRIS-Rex to 101955 Bennu (1999 RQ36).
        Sometimes asteroid samples get delivered almost to our feet, such as with an Arizona bolide in June 2016. A new science paper analyzes that event and also reviews the SkySentinel network of all-sky cameras.
        Much, much further away -- out beyond Saturn, centaur 95P/Chiron (1977 UB) (also numbered as minor planet 2060) exhibits unusual cometary activity and is believed from stellar occultation to have one or more rings. A new paper suggests that its activity might be "caused by debris and material diverging from Chiron's ring, falling back to its surface, producing outbursts, and forming a bound or quasi-bound coma."



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 objects that have approached Earth within ten LD since A/CC began these traffic reports eleven years ago but are not presently 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 19 January '18

The MPC's NEO Confirmation Page has 50 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 50 objects listed. Of these, 24 were "one nighters." The Tracking News counted a total of 87 listings on the NEOCP on this day.

New MPECs  on 19 January '18

Minor Planet Electronic Circulars

There were 26 MPECs posted this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2018-B75 - "23:59 UT" - 2018 BR1


MPEC 2018-B74 - "23:55 UT" - 2018 BQ1


MPEC 2018-B73 - "23:51 UT" - 2018 BH1


MPEC 2018-B72 - "23:36 UT" - 2018 BX1


MPEC 2018-B71 - "23:32 UT" - 2018 BW1


MPEC 2018-B70 - "23:29 UT" - 2018 BV1


MPEC 2018-B69 - "23:25 UT" - 2018 BU1


MPEC 2018-B68 - "23:21 UT" - 2018 BT1


MPEC 2018-B67 - "23:17 UT" - 2018 BS1


MPEC 2018-B66 - "23:13 UT" - 2018 BP1


MPEC 2018-B65 - "23:09 UT" - 2018 BO1


MPEC 2018-B64 - "23:05 UT" - 2018 BN1


MPEC 2018-B63 - "23:01 UT" - 2018 BM1


MPEC 2018-B62 - "22:57 UT" - 2018 BL1


MPEC 2018-B61 - "22:53 UT" - 2018 BK1


MPEC 2018-B60 - "22:49 UT" - 2018 BJ1


MPEC 2018-B59 - "22:45 UT" - 2018 BG1


MPEC 2018-B58 - "22:41 UT" - 2018 AM13


MPEC 2018-B57 - "22:24 UT" - 2018 AL13


MPEC 2018-B56 - "22:20 UT" - 2018 AK13


MPEC 2018-B55 - "19:06 UT" - 2017 BM3


MPEC 2018-B54 - "19:03 UT" - 2014 OY1


MPEC 2018-B53 - "19:01 UT" - 2014 EY24


MPEC 2018-B52 - "18:58 UT" - 2013 BO27


<< DOU on 19 Jan. '18 >>  MPEC 2018-B51 - "13:06 UT" - Daily Orbit Update


MPEC 2018-B50 - "04:12 UT" - 2018 BX

Observers  on 19 January '18

A total of 36 observers appeared in this day's MPECs.

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 1 in MPEC 2018-B68 -- 2018 BT1
H21Astronomical Research Obs. Westfield in Illinois, 15 in MPECs 2018-B51, 2018-B53, 2018-B54 & 2018-B65 -- 2018 BO1, 2018 AV, 2017 WZ, 2017 WU13, 2017 WK14, 2017 VL15, 2017 UZ51, 2017 QL18, 2014 OY1, 2014 EY24, 2007 VL8, 2004 QC17, 349219, 199801, 153958
T08ATLAS Mauna Loa in Hawaii, 27 in MPECs 2018-B51 & 2018-B68 -- 2018 BT1, 2017 YR1, 2015 BS509, 2007 AG, 2004 BB, 1999 AF4, 505667, 495848, 385580, 333888, 265187, 164121, 163691, 162038, 14402, 142040, 140039, 138013, 136849, 11405, 100926, 8567, 7977, 6050, 5587, 2329, 1980
C77Bernezzo Obs. in Italy, 1 in MPEC 2018-B69 -- 2018 BU1
703Catalina Sky Survey (CSS) in Arizona, 46 in MPECs 2018-B50, 2018-B51, 2018-B66, 2018-B68, 2018-B69, 2018-B70, 2018-B71, 2018-B72, 2018-B74 & 2018-B75 -- 2018 BX1, 2018 BX, 2018 BW1, 2018 BV1, 2018 BU1, 2018 BT1, 2018 BR1, 2018 BQ1, 2018 BP1, 2018 AG, 2017 XV2, 2017 XH62, 2017 UR7, 2017 QL33, 2015 YR1, 2015 RL82, 2013 TH5, 2009 QL8, 2005 BS27, 88188, 85818, 68278, 53110, 507366, 496861, 496816, 439908, 417217, 348314, 302311, 27346, 267221, 262623, 259802, 21374, 185853, 172034, 162011, 154589, 143992, 137925, 137805, 136839, 101873, 8037, 1981
K51Celado Obs. in Italy, 3 in MPECs 2018-B67, 2018-B70 & 2018-B74 -- 2018 BV1, 2018 BS1, 2018 BQ1
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 4 in MPECs 2018-B51, 2018-B55, 2018-B56 & 2018-B57 -- 2018 AL13, 2018 AK13, 2017 YP5, 2017 BM3
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2018-B68 -- 2018 BT1
J27El Guijo Obs. in Spain, 6 in MPEC 2018-B51 -- 1999 AF4, 385580, 302311, 153349, 8567, 7977
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2018-B74 -- 2018 BQ1
J95Great Shefford Obs. in England, 15 in MPECs 2018-B50, 2018-B51, 2018-B52, 2018-B58, 2018-B59, 2018-B66, 2018-B67, 2018-B68, 2018-B69, 2018-B70, 2018-B71, 2018-B72, 2018-B74 & 2018-B75 -- 2018 BX1, 2018 BX, 2018 BW1, 2018 BV1, 2018 BU1, 2018 BT1, 2018 BS1, 2018 BR1, 2018 BQ1, 2018 BP1, 2018 BG1, 2018 BC, 2018 AM13, 2018 AF1, 2013 BO27
H15ISON New Mexico Obs. in New Mexico, 2 in MPEC 2018-B51 -- 311554, 1627
H06iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2018-B68 -- 2018 BT1
I89'Steven M. Tilley in Louisiana via iTelescope Obs. Nerpio in Spain, 1 in MPEC 2018-B68 -- 2018 BT1
Q62`Steven M. Tilley in Louisiana via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2018-B68 -- 2018 BT1
K38M57 Obs. in Italy, 1 in MPEC 2018-B69 -- 2018 BU1
H01Magdalena Ridge Obs. (MRO) in New Mexico, 13 in MPECs 2018-B50, 2018-B51, 2018-B56, 2018-B59, 2018-B60, 2018-B61, 2018-B63, 2018-B68, 2018-B69, 2018-B71, 2018-B72, 2018-B74 & 2018-B75 -- 2018 BX1, 2018 BX, 2018 BW1, 2018 BU1, 2018 BT1, 2018 BR1, 2018 BQ1, 2018 BM1, 2018 BK1, 2018 BJ1, 2018 BG1, 2018 AV2, 2018 AK13
568_Marco Micheli on Mauna Kea in Hawaii, 16 in MPECs 2018-B51, 2018-B56, 2018-B57, 2018-B59, 2018-B60, 2018-B61, 2018-B62, 2018-B63, 2018-B64, 2018-B65, 2018-B66 & 2018-B73 -- 2018 BV, 2018 BU, 2018 BT, 2018 BS, 2018 BR, 2018 BP1, 2018 BO1, 2018 BN1, 2018 BM1, 2018 BL1, 2018 BK1, 2018 BJ1, 2018 BH1, 2018 BG1, 2018 AL13, 2018 AK13
711McDonald Obs. in Texas, 2 in MPECs 2018-B56 & 2018-B57 -- 2018 AL13, 2018 AK13
G96Mt. Lemmon Survey (MLS) in Arizona, 27 in MPECs 2018-B51, 2018-B52, 2018-B58, 2018-B68 & 2018-B74 -- 2018 BT1, 2018 BQ1, 2018 AM13, 2017 YR1, 2017 TS3, 2013 BO27, 2012 QP17, 2011 EB7, 2008 OP8, 2004 BG86, 2003 YP3, 85709, 496981, 438452, 422699, 411201, 399611, 368664, 338176, 192559, 154652, 14402, 142464, 142040, 141874, 11405, 8035
J69North Obs. in England, 3 in MPECs 2018-B51 & 2018-B68 -- 2018 BT1, 2017 YN3, 2003 UO12
423North Ryde Obs. in New South Wales, 1 in MPEC 2018-B51 -- 415029
Z80Northolt Branch Obs. in England, 1 in MPEC 2018-B68 -- 2018 BT1
F51Pan-STARRS 1 (PS1) in Hawaii, 13 in MPECs 2018-B56, 2018-B57, 2018-B59, 2018-B60, 2018-B61, 2018-B62, 2018-B63, 2018-B64, 2018-B65, 2018-B66, 2018-B67, 2018-B68 & 2018-B73 -- 2018 BT1, 2018 BS1, 2018 BP1, 2018 BO1, 2018 BN1, 2018 BM1, 2018 BL1, 2018 BK1, 2018 BJ1, 2018 BH1, 2018 BG1, 2018 AL13, 2018 AK13
K63Pascoli Obs. in Italy, 1 in MPEC 2018-B68 -- 2018 BT1
K61Rokycany Obs. in the Czech Republic, 6 in MPECs 2018-B67, 2018-B68, 2018-B69, 2018-B70, 2018-B72 & 2018-B74 -- 2018 BX1, 2018 BV1, 2018 BU1, 2018 BT1, 2018 BS1, 2018 BQ1
204Schiaparelli Obs. in Italy, 9 in MPECs 2018-B58, 2018-B61, 2018-B67, 2018-B68, 2018-B69, 2018-B70, 2018-B71, 2018-B72 & 2018-B74 -- 2018 BX1, 2018 BW1, 2018 BV1, 2018 BU1, 2018 BT1, 2018 BS1, 2018 BQ1, 2018 BK1, 2018 AM13
033Schwarzschild Obs. in Germany, 10 in MPECs 2018-B51, 2018-B52, 2018-B58, 2018-B66, 2018-B67, 2018-B68, 2018-B70, 2018-B71, 2018-B72 & 2018-B74 -- 2018 BX1, 2018 BX, 2018 BW1, 2018 BV1, 2018 BT1, 2018 BS1, 2018 BQ1, 2018 BP1, 2018 AM13, 2013 BO27
W88"program code '"' (11) via Slooh.com Chile Obs. in Chile, 1 in MPEC 2018-B68 -- 2018 BT1
587Sormano Obs. in Italy, 4 in MPECs 2018-B67, 2018-B70, 2018-B71 & 2018-B74 -- 2018 BW1, 2018 BV1, 2018 BS1, 2018 BQ1
691Spacewatch 0.9m telescope in Arizona, 15 in MPECs 2018-B51, 2018-B58 & 2018-B65 -- 2018 BO1, 2018 AM13, 2018 AG13, 2017 YO6, 2017 YF7, 2017 YA6, 2017 XG2, 2017 VX1, 2017 UR7, 2017 SS19, 2017 NL6, 2016 CW31, 2011 EB7, 2009 EV, 496818
291Spacewatch 1.8m telescope in Arizona, 11 in MPECs 2018-B51, 2018-B56, 2018-B57, 2018-B61, 2018-B62, 2018-B64, 2018-B65 & 2018-B73 -- 2018 BO1, 2018 BN1, 2018 BL1, 2018 BK1, 2018 BH1, 2018 AL13, 2018 AK13, 2018 AB12, 2017 YT5, 2017 RL, 2012 OQ
W34Squirrel Valley Obs. in North Carolina, 2 in MPECs 2018-B51 & 2018-B69 -- 2018 BU1, 12711
I52Steward Obs. Mt. Lemmon Station in Arizona, 22 in MPECs 2018-B50, 2018-B51, 2018-B52, 2018-B58, 2018-B59, 2018-B61, 2018-B67, 2018-B68, 2018-B69, 2018-B70, 2018-B71, 2018-B72, 2018-B74 & 2018-B75 -- 2018 BX1, 2018 BX, 2018 BW1, 2018 BV1, 2018 BU1, 2018 BT1, 2018 BS1, 2018 BR1, 2018 BQ1, 2018 BK1, 2018 BG1, 2018 BA, 2018 AX3, 2018 AX, 2018 AV11, 2018 AM13, 2018 AM12, 2018 AG1, 2018 AF1, 2013 BO27, 2003 UO12, 138175
T14UH/Tholen NEO Follow-Up CFH Telescope in Hawaii, 1 in MPEC 2018-B54 -- 2014 OY1
L01Visnjan Obs., 1 in MPEC 2018-B74 -- 2018 BQ1
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 19 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 BPNEODyS16382034-21171024.4e-07-4.27-4.910NEODyS: "Based on 29 optical observations (of which 5 are rejected as outliers) from 2018-01-16.155 to 2018-01-18.097."
2018 BCJPL Sentry16382082-210671.23704e-05-7.40-7.850JPL: Computed at 08:12 today Pacific time based on 42 observations spanning 1.9667 days (2018-Jan-17.21005 to 2018-Jan-19.176764). Diameter approximately 0.005 km. from weighted mean H=29.32.
NEODyS16382082-2113163.77e-05-6.89-7.10NEODyS: "Based on 35 optical observations (of which 2 are rejected as outliers) from 2018-01-17.211 to 2018-01-17.985."
2018 AB12JPL Sentry1638R E M O V E DJPL: Risk listing removed at 1622 UTC today
NEODyS16382103-211223.32e-08-7.59-7.690NEODyS: "Based on 24 optical observations (of which 0 are rejected as outliers) from 2018-01-14.378 to 2018-01-18.355."
2018 AE4NEODyS1638211012.63e-08-7.64-7.640NEODyS: "Based on 31 optical observations (of which 2 are rejected as outliers) from 2018-01-13.463 to 2018-01-18.472."
2018 AE2NEODyS1638211314.75e-08-4.89-4.890NEODyS: "Based on 24 optical observations (of which 4 are rejected as outliers) from 2018-01-05.482 to 2018-01-18.216."

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 19 January '18

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

0036 1/20Grabbed MPEC 2018-B75 - 2018 BR1 - see above
2358Grabbed MPEC 2018-B63 - 2018 BM1 - see above
Grabbed MPEC 2018-B64 - 2018 BN1 - see above
Grabbed MPEC 2018-B65 - 2018 BO1 - see above
Grabbed MPEC 2018-B66 - 2018 BP1 - see above
Grabbed MPEC 2018-B67 - 2018 BS1 - see above
Grabbed MPEC 2018-B68 - 2018 BT1 - see above
Grabbed MPEC 2018-B69 - 2018 BU1 - see above
Grabbed MPEC 2018-B70 - 2018 BV1 - see above
Grabbed MPEC 2018-B71 - 2018 BW1 - see above
Grabbed MPEC 2018-B72 - 2018 BX1 - see above
Grabbed MPEC 2018-B73 - 2018 BH1 - see above
Grabbed MPEC 2018-B74 - 2018 BQ1 - see above
2301Grabbed MPEC 2018-B56 - 2018 AK13 - see above
Grabbed MPEC 2018-B57 - 2018 AL13 - see above
Grabbed MPEC 2018-B58 - 2018 AM13 - see above
Grabbed MPEC 2018-B59 - 2018 BG1 - see above
Grabbed MPEC 2018-B60 - 2018 BJ1 - see above
Grabbed MPEC 2018-B61 - 2018 BK1 - see above
Grabbed MPEC 2018-B62 - 2018 BL1 - see above
2042Updated Traffic Report
1907Grabbed MPEC 2018-B52 - 2013 BO27 - see above
Grabbed MPEC 2018-B53 - 2014 EY24 - see above
Grabbed MPEC 2018-B54 - 2014 OY1 - see above
Grabbed MPEC 2018-B55 - 2017 BM3 - see above
1638Noted that JPL Sentry has removed 2018 AB12 as an impact risk - see above
Noted that NEODyS has updated its 2018 AB12 risk assessment - see above
Noted that NEODyS has updated its 2018 AE2 risk assessment - see above
Noted that NEODyS has updated its 2018 AE4 risk assessment - see above
Noted that JPL Sentry has updated its 2018 BC risk assessment - see above
Noted that NEODyS has posted 2018 BC as an impact risk - see above
Noted that NEODyS has posted 2018 BP as an impact risk - see above
Grabbed MPEC 2018-B51 - Daily Orbit Update - see above
0450Grabbed MPEC 2018-B50 - 2018 BX - see above