Contents  on 3 February '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 3 February '19

Six objects reported inside ten LD

Six planetesimals are reported within ten lunar distances (LD) of Earth today. The nearest, 2019 BR3, exits our planet's sphere of gravitational influence as it moves away from 1.95 to 3.77 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
1.6   LD yesterday* 2019 BR3 9 m  1.9 to 3.8 LD Jan. 29 - Feb. 6 EPU +/- 9 mins.*, NHATS target, exits Earth SOI - DOU
2.57 LD Jan. 30 2019 BL4 9 m  9.90 to 12.35 LD Jan. 26 - today exits ten LD
3.13 LD Jan. 26 2019 BU3 5 m  8.49 to 9.46 LD Jan. 16 - tomorrow NHATS target - DOU
4.14 LD Feb. 6 2019 BK4 13 m  5.94 from 7.56 LD Feb. 1 - 10 NHATS target - DOU
5.00 LD Jan. 29 2019 BY3 11 m  9.63 to 11.33 LD Jan. 25 - today exits ten LD
7.01 LD yesterday 2019 BC5 28 m  7.75 to 10.12 LD Jan. 31 - today exits ten LD - DOU
* EPU = Earth passage uncertainty

This report was generated at 1955 UTC with follow-up in today's DOU MPEC for four objects in the above active traffic table and for five departed objects: 2019 BU2, 2019 AA10, and including risk-listed objects 2019 BU1, 2019 BZ, and 2019 AQ2.

Approaching
7.3   LD Feb. 12* 2017 PV25 41 m  13.8 from 15.0 LD Feb. 7 - 17 EPU +/- 1.07 hours*, NHATS target



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 3 February '19

The MPC's NEO Confirmation Page has 45 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 45 objects listed. Of these, 38 were "one nighters." So far The Tracking News has counted a total of 47 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 February '19

Minor Planet Electronic Circulars

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


MPEC 2019-C18 - "20:41 UT" - Comet P/2018 V5 (Trujillo-Sheppard)


<< DOU on 3 Feb. '19 >>  MPEC 2019-C17 - "13:11 UT" - Daily Orbit Update


MPEC 2019-C16 - "11:19 UT" - 2014 RC12


MPEC 2019-C15 - "04:10 UT" - Comet C/2018 Y1 (Iwamoto)


MPEC 2019-C14 - "03:55 UT" - Comet P/2018 Y2 (Africano)


MPEC 2019-C13 - "03:45 UT" - Comet P/2019 A2 (ATLAS)


MPEC 2019-C12 - "03:18 UT" - Comet P/2019 A4 (Panstarrs)


MPEC 2019-C11 - "03:01 UT" - Comet C/2019 B1 (Africano)

Observers  on 3 February '19

A total of 54 observers appear in today's MPECs.

CodeObserver / observatory
L2729PREMOTE Obs., 1 in MPEC 2019-C13 -- P/2019 A2
834AAAA Buenos Aires Obs. in Argentina, 1 in MPEC 2019-C17 -- 454177
349Ageo Obs. in Japan, 3 in MPECs 2019-C13, 2019-C14 & 2019-C15 -- P/2019 A2, P/2018 Y2, C/2018 Y1
H21Astronomical Research Obs. Westfield in Illinois, 23 in MPEC 2019-C17 -- 2019 BL, 2019 AV11, 2019 AR9, 2019 AQ6, 2019 AP13, 2019 AM13, 2019 AK13, 2019 AF13, 2019 AE11, 2018 XL5, 2018 XH2, 2018 XE20, 2018 WM, 2018 QT, 2018 QP1, 2016 NN39, 2014 YY43, 2014 KT86, 2011 AR26, 276049, 229007, 173664, 159923
T05ATLAS Haleakala in Hawaii, 1 in MPEC 2019-C13 -- P/2019 A2
T08ATLAS Mauna Loa in Hawaii, 25 in MPECs 2019-C11, 2019-C13, 2019-C14, 2019-C15 & 2019-C17 -- C/2019 B1, P/2019 A2, P/2018 Y2, C/2018 Y1, 2012 OP4, 2012 BN11, 2005 YY36, 90403, 523631, 515767, 453778, 376864, 31210, 231134, 22771, 180186, 163000, 139359, 137084, 7358, 5879, 4596, 4055, 1943, 1627
I47Auger Obs. in Argentina, 1 in MPEC 2019-C15 -- C/2018 Y1
W96Campo Catino Austral Obs. (CAO) in Chile, 2 in MPECs 2019-C13 & 2019-C15 -- P/2019 A2, C/2018 Y1
160Castelmartini Obs. in Italy, 7 in MPEC 2019-C17 -- 2018 VB9, 2007 NL1, 90403, 89959, 523604, 6178, 5131
703Catalina Sky Survey in Arizona, 1 in MPEC 2019-C11 -- C/2019 B1
A77Chante-Perdrix Obs. in France, 1 in MPEC 2019-C15 -- C/2018 Y1
Z99Clixby Obs. in England, 1 in MPEC 2019-C11 -- C/2019 B1
850Cordell-Lorenz Obs. in Tennessee, 2 in MPECs 2019-C13 & 2019-C15 -- P/2019 A2, C/2018 Y1
L29Drebach-South Obs., 1 in MPEC 2019-C13 -- P/2019 A2
K02Eastwood Obs. in England, 1 in MPEC 2019-C15 -- C/2018 Y1
006Fabra Obs. in Spain, 1 in MPEC 2019-C17 -- 5131
157Frasso Sabino Obs. in Italy, 1 in MPEC 2019-C14 -- P/2018 Y2
E89Geyserland Obs. in New Zealand, 1 in MPEC 2019-C15 -- C/2018 Y1
E94Gisborne Obs. in New Zealand, 1 in MPEC 2019-C15 -- C/2018 Y1
J95Great Shefford Obs. in England, 12 in MPEC 2019-C17 -- 2019 BX3, 2019 BW1, 2019 BQ4, 2019 BP1, 2019 BK4, 2019 BH3, 2019 BH1, 2019 BF3, 2019 BE3, 2019 BD3, 2019 BC5, 2019 AV2
H06#M. Suzuki in Japan via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2019-C15 -- C/2018 Y1
H06|Hidetaka Sato in Japan via iTelescope Obs. Mayhill in New Mexico, 2 in MPECs 2019-C11 & 2019-C18 -- C/2019 B1, P/2018 V5
D95Kurihara Obs. in Japan, 1 in MPEC 2019-C15 -- C/2018 Y1
W85LCO Cerro Tololo A in Chile, 1 in MPEC 2019-C13 -- P/2019 A2
W87LCO Cerro Tololo C in Chile, 1 in MPEC 2019-C13 -- P/2019 A2
W92MASTER OAFA Obs., 1 in MPEC 2019-C17 -- 511684
711McDonald Obs. in Texas, 11 in MPECs 2019-C17 & 2019-C18 -- 2019 BW1, 2019 BU1, 2019 BG2, 2019 BC1, 2019 AS9, 2019 AR13, 2019 AQ8, 2018 YS, 2018 XD2, 2018 VY7, P/2018 V5
213Montcabre Obs. in Spain, 1 in MPEC 2019-C13 -- P/2019 A2
474Mt. John Obs. in New Zealand, 6 in MPEC 2019-C17 -- 2019 BT2, 2019 AT9, 2019 AO3, 2019 AH11, 2019 AA14, 2018 YB1
G96Mt. Lemmon Survey (MLS) in Arizona, 3 in MPECs 2019-C12, 2019-C13 & 2019-C14 -- P/2019 A4, P/2019 A2, P/2018 Y2
D74Nakagawa Obs., 2 in MPECs 2019-C11 & 2019-C15 -- C/2019 B1, C/2018 Y1
C47Nonndorf Obs. in Austria, 1 in MPEC 2019-C13 -- P/2019 A2
Z80Northolt Branch Obs. in England, 1 in MPEC 2019-C17 -- 137805
557Ondrejov Obs. in the Czech Republic, 1 in MPEC 2019-C17 -- 2016 AZ8
J43Oukaimeden Obs. in Morocco, 1 in MPEC 2019-C13 -- P/2019 A2
F51Pan-STARRS 1 (PS1) in Hawaii, 2 in MPECs 2019-C11 & 2019-C18 -- C/2019 B1, P/2018 V5
323Perth Obs. in Western Australia, 2 in MPECs 2019-C15 & 2019-C17 -- C/2018 Y1, 2012 OP4
C95SATINO-1 in France, 1 in MPEC 2019-C17 -- 242147
204Schiaparelli Obs. in Italy, 14 in MPEC 2019-C17 -- 2019 BU3, 2019 BU2, 2019 BR3, 2019 BK, 2019 BF3, 2019 BD3, 2019 BC3, 2019 AQ3, 2019 AP11, 2019 AF3, 2019 AA10, 2018 YW, 2014 JU54, 2003 NW1
033Schwarzschild Obs. in Germany, 1 in MPEC 2019-C17 -- 2019 BS4
Q11Shinshiro Obs., 2 in MPECs 2019-C11 & 2019-C13 -- C/2019 B1, P/2019 A2
G40!M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Canary Islands Obs. in the Canary Islands, 2 in MPEC 2019-C17 -- 2019 AV2, 515767
G409B. Lutkenhoner in Germany via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-C15 -- C/2018 Y1
W883B. Lutkenhoner in Germany via Slooh.com Chile Obs. in Chile, 1 in MPEC 2019-C15 -- C/2018 Y1
Q21Southern Utsunomiya in Japan, 2 in MPECs 2019-C13 & 2019-C15 -- P/2019 A2, C/2018 Y1
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2019-C17 -- 2008 CR1
W34Squirrel Valley Obs. in North Carolina, 1 in MPEC 2019-C17 -- 2012 BC124
A71Stixendorf Obs. in Austria, 4 in MPECs 2019-C11, 2019-C12, 2019-C13 & 2019-C14 -- C/2019 B1, P/2019 A4, P/2019 A2, P/2018 Y2
J22Tacande Obs. in the Canary Islands, 1 in MPEC 2019-C15 -- C/2018 Y1
I81Tarbatness Obs. in Scotland, 1 in MPEC 2019-C15 -- C/2018 Y1
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 5 in MPECs 2019-C16 & 2019-C17 -- 2019 BZ, 2019 BD3, 2019 AQ2, 2018 XB4, 2014 RC12
T09UH/Tholen NEO Follow-Up Subaru Telescope in Hawaii, 1 in MPEC 2019-C18 -- P/2018 V5
H47Vicksburg Obs. in Mississippi, 1 in MPEC 2019-C15 -- C/2018 Y1
I15Wishing Star Obs. in Rhode Island, 1 in MPEC 2019-C17 -- 511684
C42Xingming Obs. in China, 1 in MPEC 2019-C13 -- P/2019 A2
367Yatsuka Obs. in Japan, 1 in MPEC 2019-C15 -- C/2018 Y1
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 3 February '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 BE5NEODyS18002038-2107282.01e-05-4.42-4.50NEODyS: "Based on 57 optical observations (of which 0 are rejected as outliers) from 2019-01-31.325 to 2019-02-02.790."
JPL Sentry00172038-2100111.525997e-05-4.52-4.600JPL: Computed at 15:49 Feb. 2nd Pacific time based on 57 observations spanning 2.4645 days (2019-Jan-31.324536 to 2019-Feb-02.789036). Diameter approximately 0.033 km. from weighted mean H=25.07.
2019 BB5NEODyS1800210911.29e-07-8.15-8.150NEODyS: "Based on 47 optical observations (of which 0 are rejected as outliers) from 2019-01-30.357 to 2019-02-02.299."
2019 BD3NEODyS2000R E M O V E D-
2019 BU1NEODyS20002056-206228.43e-07-6.49-6.530NEODyS: "Based on 56 optical observations (of which 1 are rejected as outliers) from 2019-01-25.328 to 2019-02-03.270."
JPL Sentry18002062-206211.562e-06-6.21-6.210JPL: Computed at 08:08 today Pacific time based on 56 observations spanning 8.9421 days (2019-Jan-25.32671 to 2019-Feb-03.26884). Diameter approximately 0.020 km. from weighted mean H=26.14.
2019 BP1NEODyS2000R E M O V E D-
JPL Sentry1800R E M O V E DJPL: Risk listing removed at 1625 UTC today
2019 BZNEODyS20002067-2118331.87e-05-6.22-6.43-NEODyS: "Based on 36 optical observations (of which 3 are rejected as outliers) from 2019-01-24.181 to 2019-02-01.355."
JPL Sentry18002077-2119232.6634874e-05-6.03-6.240JPL: Computed at 08:03 today Pacific time based on 34 observations spanning 8.1298 days (2019-Jan-24.224468 to 2019-Feb-01.354299). Diameter approximately 0.010 km. from weighted mean H=27.57.
2019 AQ2NEODyS2000R E M O V E D-
JPL Sentry1800R E M O V E DJPL: Risk listing removed at 1550 UTC today
2018 XB4NEODyS20002071-2118501.54e-04-3.67-3.69-NEODyS: "Based on 65 optical observations (of which 0 are rejected as outliers) from 2018-12-13.344 to 2019-01-24.128."
JPL Sentry18002071-2118170.000172382306-3.60-3.620JPL: Computed at 07:46 today Pacific time based on 65 observations spanning 41.783 days (2018-Dec-13.34358 to 2019-Jan-24.12672). Diameter approximately 0.053 km. from weighted mean H=24.01.

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 February '19

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

2230Grabbed MPEC 2019-C18 - Comet P/2018 V5 (Trujillo-Sheppard) - see above
2000Noted that NEODyS has updated its 2018 XB4 risk assessment - see above
Noted that NEODyS has removed 2019 AQ2 as an impact risk - see above
Noted that NEODyS has removed 2019 BD3 as an impact risk - see above
Noted that NEODyS has removed 2019 BP1 as an impact risk - see above
Noted that NEODyS has updated its 2019 BU1 risk assessment - see above
Noted that NEODyS has updated its 2019 BZ risk assessment - see above
1955Generated Traffic Report
1800Noted that JPL Sentry has updated its 2018 XB4 risk assessment - see above
Noted that JPL Sentry has removed 2019 AQ2 as an impact risk - see above
Noted that NEODyS has posted 2019 BB5 as an impact risk - see above
Noted that NEODyS has posted 2019 BE5 as an impact risk - see above
Noted that JPL Sentry has removed 2019 BP1 as an impact risk - see above
Noted that JPL Sentry has updated its 2019 BU1 risk assessment - see above
Noted that JPL Sentry has updated its 2019 BZ risk assessment - see above
Grabbed MPEC 2019-C16 - 2014 RC12 - see above
Grabbed MPEC 2019-C17 - Daily Orbit Update - see above
0530Grabbed MPEC 2019-C11 - Comet C/2019 B1 (Africano) - see above
Grabbed MPEC 2019-C12 - Comet P/2019 A4 (Panstarrs) - see above
Grabbed MPEC 2019-C13 - Comet P/2019 A2 (ATLAS) - see above
Grabbed MPEC 2019-C14 - Comet P/2018 Y2 (Africano) - see above
Grabbed MPEC 2019-C15 - Comet C/2018 Y1 (Iwamoto) - see above
0017Noted that JPL Sentry has posted 2019 BE5 as an impact risk - see above