Contents  on 9 January '19

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 9 January '19

Twelve objects reported inside ten LD

Twelve minor objects are reported inside ten lunar distances (LD) of our planet today. Nearest is newly announced tiny risk-listed intruder 2019 AS5, which leaves Earth's sphere of gravitational influence, moving out from 2.27 to 4.57 LD, after flying by us at 0.039 LD on January 8th -- the sixth closest passage observed by telescope and not resulting in impact.

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
0.04 LD yesterday 2019 AS5 1 m  2.27 to 4.57 LD Jan. 3 - 12 NEW, intruder, NHATS target, exits Earth SOI, risk - MPEC
2.56 LD Jan. 14 2019 AU6 16 m  9.01 from 10.95 LD today - Jan. 19 NEW, enters ten LD, risk - MPEC
2.99 LD tomorrow 2019 AD 10 m  3.03 from 3.45 LD Jan. 2 - 18 NHATS target - DOU
4.87 LD Jan. 12 2019 AK3 13 m  8.12 from 10.15 LD today - Jan. 16 enters ten LD - DOU
5.60 LD Jan. 12 2018 YU2 18 m  6.02 from 6.47 LD Jan. 4 - 20 NHATS target - DOU
7.47 LD tomorrow 2018 YQ2 20 m  7.47 from 7.57 LD Jan. 4 - 15 NHATS target, risk - DOU
7.61 LD Jan. 13 2019 AR2 47 m  8.56 from 9.11 LD Jan. 7 - 19 NHATS target - DOU
7.76 LD tomorrow 2013 YM2 19 m  7.76 from 7.82 LD Jan. 3 - 16 NHATS target
7.77 LD Jan. 5 2019 AU 16 m  8.09 to 8.32 LD Dec. 27 - Jan. 14 NHATS target
7.8   LD Jan. 6* 2018 XO4 30 m  8.0 to 8.3 LD Dec. 30 - Jan. 13 EPU +/- 17 mins.*, NHATS target
9.17 LD Jan. 4 2019 AX3 11 m  9.67 to 9.93 LD Dec. 30 - tomorrow NHATS target
9.47 LD today 2019 AX5 23 m  9.47 LD Jan. 7 - 10 NEW, Earth closest at 0041 UTC - MPEC
* EPU = Earth passage uncertainty

This report was generated at 2124 UTC with five discoveries: approaching 2019 AT6 (MPEC), inbound risk-listed 2019 AU6 (MPEC), passing 2019 AX5 (MPEC), outbound risk-listed intruder 2019 AS5 (MPEC), and departed 2019 AL6 (MPEC), which sneaked by us at about 6.6 LD on December 22nd. Today's DOU MPEC has follow-up for approaching 2019 AB5, five inbound objects: 2019 AR2, 2019 AD, 2018 YU2, and risk-listed 2019 AK3 and 2018 YQ2, and five departed objects: 2019 AT2, 2018 YK2, including three risk-listed -- 2019 AQ2 and intruders 2019 AW2 and 2018 YO2, plus astrometry from November-December for 2018 XE, 2018 XC, 2018 WD2, 2018 VU8, and 2018 UQ1.

Approaching - sorted by 10-LD bubble entry date
8.1   LD Jan. 15* 2019 AT6 10 m  10.0 from 10.8 LD tomorrow - Jan. 20 NEW, EPU +/- 6 mins.* - MPEC
7.5   LD Jan. 19* 2019 AB5 26 m  16.7 from 18.0 LD Jan. 15 - 24 EPU +/- 21 mins.* - DOU



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. "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 9 January '19

The MPC's NEO Confirmation Page has 110 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 110 objects listed. Of these, 50 were "one nighters." So far The Tracking News has counted a total of 141 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 9 January '19

Minor Planet Electronic Circulars

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


MPEC 2019-A142 - "15:57 UT" - 2019 AV6


MPEC 2019-A141 - "15:52 UT" - 2019 AU6


MPEC 2019-A140 - "15:48 UT" - 2019 AT6


MPEC 2019-A139 - "15:44 UT" - 2019 AS6


MPEC 2019-A138 - "15:40 UT" - 2019 AR6


MPEC 2019-A137 - "15:36 UT" - 2019 AQ6


MPEC 2019-A136 - "15:32 UT" - 2019 AP6


MPEC 2019-A135 - "15:27 UT" - 2019 AO6


MPEC 2019-A134 - "15:23 UT" - 2019 AN6


MPEC 2019-A133 - "15:16 UT" - 2019 AM6


MPEC 2019-A132 - "15:10 UT" - 2019 AL6


<< DOU on 9 Jan. '19 >>  MPEC 2019-A131 - "13:06 UT" - Daily Orbit Update


MPEC 2019-A130 - "03:49 UT" - 2019 AX5


MPEC 2019-A129 - "02:55 UT" - 2018 EA1


MPEC 2019-A128 - "01:35 UT" - 2019 AS5


MPEC 2019-A127 - "00:27 UT" - 2019 AR5

Observers  on 9 January '19

A total of 34 observers appear in today's MPECs.

CodeObserver / observatory
J57Alto Turia Obs. in Spain, 1 in MPEC 2019-A131 -- 2019 AR3
H21Astronomical Research Obs. Westfield in Illinois, 31 in MPECs 2019-A129, 2019-A131, 2019-A132, 2019-A135, 2019-A137 & 2019-A142 -- 2019 AZ2, 2019 AY2, 2019 AX2, 2019 AV6, 2019 AV2, 2019 AR2, 2019 AQ6, 2019 AP2, 2019 AO6, 2019 AL6, 2018 XV3, 2018 XP3, 2018 XM5, 2018 WP2, 2018 WH2, 2018 VZ8, 2018 VT8, 2018 VH1, 2018 VE4, 2018 TS5, 2018 PJ22, 2018 EA1, 2016 BX14, 2013 BG27, 2012 HJ1, 2009 CT, 2009 BL71, 2005 GL, 2003 WY87, 285331, 17188
T05ATLAS Haleakala in Hawaii, 1 in MPEC 2019-A127 -- 2019 AR5
V06Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) in Arizona, 13 in MPECs 2019-A129, 2019-A131, 2019-A137, 2019-A138, 2019-A139, 2019-A140 & 2019-A142 -- 2019 AV6, 2019 AV, 2019 AT6, 2019 AT2, 2019 AS6, 2019 AR6, 2019 AQ6, 2019 AN, 2019 AG2, 2018 YF2, 2018 XD5, 2018 EA1, 2007 HW4
K51Celado Obs. in Italy, 4 in MPECs 2019-A130, 2019-A134, 2019-A139 & 2019-A140 -- 2019 AX5, 2019 AT6, 2019 AS6, 2019 AN6
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 6 in MPEC 2019-A131 -- 2019 AR4, 2019 AO3, 2018 YU, 2018 VN3, 2018 RV5, 2018 PX23
Z45Cosmos Obs., 1 in MPEC 2019-A131 -- 137084
G37Discovery Channel Telescope in Arizona, 1 in MPEC 2019-A131 -- 2018 RY7
L29Drebach-South Obs., 1 in MPEC 2019-A127 -- 2019 AR5
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 6 in MPECs 2019-A128, 2019-A131 & 2019-A141 -- 2019 AW2, 2019 AU6, 2019 AS5, 2018 YQ2, 2018 WK2, 2004 XP14
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2019-A131 -- 2019 AV2
157Frasso Sabino Obs. in Italy, 1 in MPEC 2019-A131 -- 2018 XT2
E89Geyserland Obs. in New Zealand, 2 in MPEC 2019-A131 -- 2007 YQ56, 418929
203GiaGa Obs. in Italy, 2 in MPECs 2019-A131 & 2019-A134 -- 2019 AV2, 2019 AN6
K88GINOP-KHK in Hungary, 2 in MPEC 2019-A131 -- 2019 AD5, 2019 AC
J95Great Shefford Obs. in England, 8 in MPECs 2019-A130, 2019-A131, 2019-A134, 2019-A136, 2019-A139 & 2019-A140 -- 2019 AX5, 2019 AT6, 2019 AS6, 2019 AR5, 2019 AP6, 2019 AN6, 2018 YQ2, 2004 XP14
238Grorudalen Obs. in Norway, 1 in MPEC 2019-A131 -- 523604
K91LCO Sutherland A in South Africa, 1 in MPEC 2019-A131 -- 2004 XP14
568^R. Wainscoat on Mauna Kea in Hawaii, 1 in MPEC 2019-A131 -- 2019 AB5
G96Mt. Lemmon Survey (MLS) in Arizona, 9 in MPECs 2019-A128, 2019-A130, 2019-A132, 2019-A134, 2019-A138, 2019-A139, 2019-A140, 2019-A141 & 2019-A142 -- 2019 AX5, 2019 AV6, 2019 AU6, 2019 AT6, 2019 AS6, 2019 AS5, 2019 AR6, 2019 AN6, 2019 AL6
J69North Obs. in England, 4 in MPEC 2019-A131 -- 2019 AD5, 2018 XV, 2018 XR, 2004 XP14
I41Palomar Transient Factory (PTF) in southern California, 12 in MPECs 2019-A131 & 2019-A136 -- 2019 AP6, 2014 XR6, 2013 RX80, 385268, 31345, 308127, 277473, 20790, 154656, 137805, 1866, 1627
F51Pan-STARRS 1 (PS1) in Hawaii, 10 in MPECs 2019-A130, 2019-A131, 2019-A132, 2019-A133, 2019-A134, 2019-A135, 2019-A137, 2019-A138, 2019-A141 & 2019-A142 -- 2019 AX5, 2019 AV6, 2019 AU6, 2019 AR6, 2019 AQ6, 2019 AO6, 2019 AN6, 2019 AM6, 2019 AL6, 2004 XP14
K63Pascoli Obs. in Italy, 2 in MPECs 2019-A131 & 2019-A134 -- 2019 AR3, 2019 AN6
104San Marcello Pistoiese Obs. in Italy, 5 in MPECs 2019-A130, 2019-A131, 2019-A134 & 2019-A136 -- 2019 AY3, 2019 AX5, 2019 AQ2, 2019 AP6, 2019 AN6
C95SATINO-1 in France, 1 in MPEC 2019-A131 -- 33342
204Schiaparelli Obs. in Italy, 39 in MPECs 2019-A130, 2019-A131, 2019-A134, 2019-A136, 2019-A139, 2019-A140 & 2019-A141 -- 2019 AZ3, 2019 AY3, 2019 AX5, 2019 AV2, 2019 AU6, 2019 AT6, 2019 AS6, 2019 AR3, 2019 AQ4, 2019 AP6, 2019 AN6, 2019 AJ3, 2018 YQ2, 2018 XE, 2018 XC, 2018 WD2, 2018 WA2, 2018 VY, 2018 VX, 2018 VU8, 2018 VT8, 2018 VL1, 2018 VK5, 2018 VG1, 2018 VF3, 2018 VB1, 2018 UZ, 2018 UR2, 2018 UQ1, 2018 UN1, 2018 TT1, 2018 TK2, 2018 QN1, 2017 NK, 2017 BQ93, 2017 BP5, 2016 UA, 2014 XR6, 2003 NW1
587Sormano Obs. in Italy, 1 in MPEC 2019-A131 -- 2019 AZ3
691Spacewatch 0.9m telescope in Arizona, 14 in MPEC 2019-A131 -- 2019 AV3, 2019 AO3, 2019 AL2, 2019 AJ2, 2018 YS2, 2018 YF2, 2018 YE2, 2018 YB, 2018 XK5, 2018 XG5, 2018 XD5, 2018 VQ3, 2007 HW4, 1999 EF5
291Spacewatch 1.8m telescope in Arizona, 18 in MPECs 2019-A128 & 2019-A131 -- 2019 AS5, 2019 AS, 2019 AR, 2019 AQ2, 2019 AN, 2019 AM, 2019 AK3, 2019 AG2, 2019 AD, 2018 YW2, 2018 YW, 2018 YQ2, 2018 YO2, 2018 YN, 2018 XZ3, 2018 XS, 2018 XB4, 2013 BC70
W34Squirrel Valley Obs. in North Carolina, 1 in MPEC 2019-A136 -- 2019 AP6
I52Steward Obs. Mt. Lemmon Station in Arizona, 29 in MPECs 2019-A127, 2019-A128, 2019-A130, 2019-A131, 2019-A133, 2019-A134, 2019-A136, 2019-A140, 2019-A141 & 2019-A142 -- 2019 AZ3, 2019 AZ2, 2019 AY3, 2019 AX5, 2019 AV6, 2019 AU6, 2019 AT6, 2019 AS5, 2019 AR5, 2019 AQ2, 2019 AQ, 2019 AP6, 2019 AN6, 2019 AM6, 2019 AL2, 2019 AK3, 2019 AD, 2018 YW2, 2018 YU2, 2018 YQ2, 2018 YK2, 2018 YJ2, 2018 YE2, 2018 XZ2, 2018 XD5, 2018 VN3, 2018 TY2, 2018 TP2, 2007 HW4
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 4 in MPECs 2019-A128, 2019-A131 & 2019-A137 -- 2019 AS5, 2019 AQ6, 2019 AQ2, 2019 AK3
L01Visnjan Obs., 5 in MPECs 2019-A131, 2019-A133, 2019-A134, 2019-A135 & 2019-A136 -- 2019 AP6, 2019 AO6, 2019 AN6, 2019 AM6, 2019 AG3
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 9 January '19

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 and NEODyS listings is 100 years, and both post impact solutions beyond that for some 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
2019 AU6JPL Sentry17302087-210391.72715e-05-5.81-6.210JPL: Computed at 09:08 today Pacific time based on 21 observations spanning 6.7620 days (2019-Jan-02.571913 to 2019-Jan-09.3339). Diameter approximately 0.016 km. from weighted mean H=26.59.
2019 AS5JPL Sentry04222085-208511.130e-07-10.60-10.60JPL: Computed at 19:01 Jan. 8th Pacific time based on 16 observations spanning .60855 days (2019-Jan-08.35867 to 2019-Jan-08.967218). Diameter approximately 0.001 km. from weighted mean H=32.24.
2019 AK3JPL Sentry1730R E M O V E DJPL: Risk listing removed at 1617 UTC today
NEODyS1730R E M O V E D-
2019 AW2JPL Sentry17302029-210851.452796e-06-5.91-6.100JPL: Computed at 08:15 today Pacific time based on 28 observations spanning 5.5212 days (2019-Jan-03.47489 to 2019-Jan-08.996108). Diameter approximately 0.031 km. from weighted mean H=25.20.
2019 AQ2JPL Sentry17302090-211377.48512e-07-6.82-7.090JPL: Computed at 08:42 today Pacific time based on 43 observations spanning 5.7736 days (2019-Jan-03.32957 to 2019-Jan-09.10321). Diameter approximately 0.026 km. from weighted mean H=25.58.
2018 YW2JPL Sentry17302050-208131.8377e-06-5.32-5.710JPL: Computed at 08:16 today Pacific time based on 43 observations spanning 8.9243 days (2018-Dec-31.52399 to 2019-Jan-09.44826). Diameter approximately 0.055 km. from weighted mean H=23.95.
2018 YQ2JPL Sentry17302112-211622.3021e-07-7.60-7.770JPL: Computed at 08:16 today Pacific time based on 51 observations spanning 8.9459 days (2018-Dec-31.16339 to 2019-Jan-09.10924). Diameter approximately 0.021 km. from weighted mean H=26.05.
2018 YO2JPL Sentry17302118-211811.007e-07-9.88-9.880JPL: Computed at 08:43 today Pacific time based on 19 observations spanning 9.9001 days (2018-Dec-29.446667 to 2019-Jan-08.34673). Diameter approximately 0.004 km. from weighted mean H=29.91.
2018 XG5JPL Sentry17302083-208314.121e-10-7.19-7.190JPL: Computed at 08:16 today Pacific time based on 47 observations spanning 26.690 days (2018-Dec-13.39431 to 2019-Jan-09.0839). Diameter approximately 0.300 km. from weighted mean H=20.30.
2018 XB4JPL Sentry17302052-2118408.07669803e-05-3.90-4.020JPL: Computed at 08:25 today Pacific time based on 50 observations spanning 26.818 days (2018-Dec-13.34358 to 2019-Jan-09.16203). Diameter approximately 0.054 km. from weighted mean H=23.98.
2010 DG77JPL Sentry04222019-21175697.3837864e-06-4.83-6.270JPL: Computed at 09:40 April 7th of 2017 Pacific time based on 10 observations spanning .59543 days (2010-Feb-19.17573 to 2010-Feb-19.77116). Diameter approximately 0.044 km. from weighted mean H=24.47.

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 9 January '19

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

2124Generated Traffic Report
1730Noted that JPL Sentry has updated its 2018 XB4 risk assessment - see above
Noted that JPL Sentry has updated its 2018 XG5 risk assessment - see above
Noted that JPL Sentry has reposted 2018 YO2 as an impact risk - see above
Noted that JPL Sentry has updated its 2018 YQ2 risk assessment - see above
Noted that JPL Sentry has updated its 2018 YW2 risk assessment - see above
Noted that JPL Sentry has removed 2019 AK3 as an impact risk - see above
Noted that NEODyS has removed 2019 AK3 as an impact risk - see above
Noted that JPL Sentry has updated its 2019 AQ2 risk assessment - see above
Noted that JPL Sentry has posted 2019 AU6 as an impact risk - see above
Noted that JPL Sentry has updated its 2019 AW2 risk assessment - see above
Grabbed MPEC 2019-A131 - Daily Orbit Update - see above
Grabbed MPEC 2019-A132 - 2019 AL6 - see above
Grabbed MPEC 2019-A133 - 2019 AM6 - see above
Grabbed MPEC 2019-A134 - 2019 AN6 - see above
Grabbed MPEC 2019-A135 - 2019 AO6 - see above
Grabbed MPEC 2019-A136 - 2019 AP6 - see above
Grabbed MPEC 2019-A137 - 2019 AQ6 - see above
Grabbed MPEC 2019-A138 - 2019 AR6 - see above
Grabbed MPEC 2019-A139 - 2019 AS6 - see above
Grabbed MPEC 2019-A140 - 2019 AT6 - see above
Grabbed MPEC 2019-A141 - 2019 AU6 - see above
Grabbed MPEC 2019-A142 - 2019 AV6 - see above
0422Noted that JPL Sentry has updated its 2010 DG77 risk assessment - see above
Noted that JPL Sentry has posted 2019 AS5 as an impact risk - see above
Grabbed MPEC 2019-A127 - 2019 AR5 - see above
Grabbed MPEC 2019-A128 - 2019 AS5 - see above
Grabbed MPEC 2019-A129 - 2018 EA1 - see above
Grabbed MPEC 2019-A130 - 2019 AX5 - see above