Contents  on 1 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 1 February '19

Seven objects reported inside ten LD

Seven Solar-System small bodies are reported within ten lunar distances (LD) of Earth today. Nearest is 2019 BR3, which enters our planet's sphere of gravitational influence as it moves in from about 3.8 to 2.0 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
0.13 LD Jan. 27 2019 BZ3 6 m  9.63 to 12.02 LD Jan. 23 - today intruder, exits ten LD, risk
1.6   LD tomorrow* 2019 BR3 9 m  2.0 from 3.8 LD Jan. 29 - Feb. 6 EPU +/- 10 mins.*, NHATS target, enters Earth SOI
2.57 LD Jan. 30 2019 BL4 9 m  5.19 to 7.49 LD Jan. 26 - Feb. 3
3.13 LD Jan. 26 2019 BU3 5 m  6.62 to 7.54 LD Jan. 16 - Feb. 4 NHATS target
3.42 LD Jan. 30 2019 BJ1 37 m  5.73 to 9.03 LD Jan. 28 - tomorrow
4.1   LD Feb. 6* 2019 BK4 13 m  9.4 from 11.2 LD today - Feb. 10 EPU +/- 17 mins.*, NHATS target, enters ten LD - DOU
5.00 LD Jan. 29 2019 BY3 11 m  6.63 to 8.04 LD Jan. 25 - Feb. 3 DOU
* EPU = Earth passage uncertainty

This report was generated at 1945 UTC with follow-up in today's DOU MPEC for inbound 2019 BK4, outbound 2019 BY3, departed objects 2019 AR2 and 2018 TG6, and distant objects 68216 2001 CV26 and 136617 1994 CC.

Approaching
7.3   LD Feb. 12* 2017 PV25 41 m  16.3 from 17.5 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. "Distant" is used here to describe objects that have approached Earth within ten LD since A/CC began these traffic reports began twelve years ago but are not presently coming so close. 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 1 February '19

The MPC's NEO Confirmation Page has 55 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 55 objects listed. Of these, 39 were "one nighters."

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 1 February '19

Minor Planet Electronic Circulars

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


<< DOU on 1 Feb. '19 >>  MPEC 2019-C02 - "13:13 UT" - Daily Orbit Update


MPEC 2019-C01 - "04:09 UT" - 2017 RL

Observers  on 1 February '19

A total of 23 observers appear in today's MPECs.

CodeObserver / observatory
T05ATLAS Haleakala in Hawaii, 17 in MPEC 2019-C02 -- 2013 LH16, 2005 YY36, 90403, 86450, 85275, 523610, 417581, 376864, 325395, 267759, 152742, 138127, 4596, 4055, 1943, 1866, 1627
T08ATLAS Mauna Loa in Hawaii, 51 in MPEC 2019-C02 -- 2019 AR2, 2019 AO10, 2016 AZ8, 2012 BC124, 2005 YY36, 90403, 89959, 86324, 68216, 523811, 523779, 523631, 480885, 458122, 417581, 410088, 40263, 382825, 376864, 36284, 345722, 308127, 25916, 21088, 18109, 163081, 163051, 141484, 139359, 137924, 137805, 137802, 136635, 5879, 5797, 5646, 5587, 5143, 5131, 4596, 4401, 4055, 3552, 3199, 3103, 1943, 1916, 1863, 1627, 1620, 1036
I47Auger Obs. in Argentina, 1 in MPEC 2019-C02 -- 2012 OP4
X74Campo dos Amarais Obs., 1 in MPEC 2019-C02 -- 454177
703Catalina Sky Survey (CSS) in Arizona, 83 in MPEC 2019-C02 -- 2019 BG1, 2019 BC1, 2019 BB1, 2019 AP3, 2019 AO10, 2019 AN2, 2019 AF3, 2019 AA9, 2018 YA3, 2018 XY2, 2018 VZ9, 2018 VW6, 2018 PX23, 2016 CA136, 2015 BY310, 2014 DM22, 2013 VD13, 2012 BN11, 2012 BC124, 2011 XE1, 2009 SV17, 2008 SW11, 2006 OH15, 2006 CU, 2005 YY36, 2003 AO4, 1999 CW8, 99935, 85275, 68063, 66272, 523631, 515767, 480885, 453778, 423100, 42286, 422787, 417581, 417419, 413002, 410088, 40267, 381677, 35396, 31210, 275611, 267759, 259221, 25916, 242147, 217807, 21088, 20790, 20460, 18736, 185851, 18109, 163693, 153243, 152931, 139622, 139359, 138925, 138127, 137925, 137805, 137802, 11311, 10302, 7358, 5879, 5797, 5587, 5131, 4596, 4401, 4015, 3691, 3103, 1916, 1863, 1862
G37Discovery Channel Telescope in Arizona, 1 in MPEC 2019-C02 -- 2018 TG6
D54MASTER-II Blagoveshchensk in Russia, 1 in MPEC 2019-C02 -- 433
G96Mt. Lemmon Survey (MLS) in Arizona, 111 in MPEC 2019-C02 -- 2019 BJ2, 2019 BG2, 2019 BG1, 2019 BF3, 2019 AY9, 2019 AX, 2019 AV4, 2019 AT9, 2019 AR5, 2019 AR2, 2019 AR13, 2019 AR11, 2019 AQ4, 2019 AP3, 2019 AP13, 2019 AO10, 2019 AN2, 2019 AM13, 2019 AM10, 2019 AF3, 2019 AA9, 2018 YZ1, 2018 YV, 2018 YD3, 2018 XY2, 2018 XU6, 2018 XU2, 2018 WV2, 2018 VB9, 2018 TS, 2018 EA1, 2016 PT8, 2016 FA4, 2016 CA136, 2016 AO131, 2015 LG2, 2015 BR515, 2015 AQ45, 2014 YR43, 2013 AV60, 2012 BN11, 2012 BC124, 2011 OL5, 2009 SV17, 2009 CT, 2008 EB32, 2008 CR1, 2007 NL1, 2006 CU, 2005 QQ30, 2005 CL, 2004 YU5, 2004 PX27, 2003 QA31, 2003 NW1, 2002 GA, 2002 AD2, 99935, 90403, 86324, 68063, 52761, 523587, 512245, 511684, 467309, 459462, 455736, 455184, 422787, 420591, 417419, 39796, 39572, 382825, 382758, 381677, 35396, 352102, 325769, 314079, 31210, 310737, 255501, 19764, 18736, 185851, 175921, 171819, 162741, 153243, 139056, 138205, 137925, 137802, 136617, 11311, 10302, 10150, 8507, 8176, 8013, 7358, 7335, 5131, 4015, 3671, 3552, 1863, 1862, 433
K74Muensterschwarzach Obs. in Germany, 2 in MPEC 2019-C02 -- 2019 AV2, 1627
Z80Northolt Branch Obs. in England, 1 in MPEC 2019-C02 -- 2013 CW32
J43Oukaimeden Obs. in Morocco, 8 in MPEC 2019-C02 -- 2018 XU6, 2013 TB80, 35396, 18736, 138925, 137925, 136923, 1862
I41Palomar Transient Factory (PTF) in southern California, 5 in MPEC 2019-C02 -- 2019 BY3, 2007 NL1, 85709, 39796, 12923
F51Pan-STARRS 1 (PS1) in Hawaii, 7 in MPEC 2019-C02 -- 349068, 234145, 231134, 141498, 11398, 5587, 4055
F52Pan-STARRS 2 (PS2) in Hawaii, 3 in MPEC 2019-C02 -- 2016 OP5, 5131, 1863
K33San Defendente Obs. in Italy, 1 in MPEC 2019-C02 -- 2019 BQ4
C95SATINO-1 in France, 1 in MPEC 2019-C02 -- 217807
033Schwarzschild Obs. in Germany, 5 in MPEC 2019-C02 -- 2019 BV4, 2019 BS4, 2019 BQ4, 2019 BP4, 2019 BK4
691Spacewatch 0.9m telescope in Arizona, 26 in MPEC 2019-C02 -- 2019 BR1, 2019 BK, 2019 BH4, 2019 BF4, 2019 BC1, 2019 AX, 2019 AQ4, 2019 AF3, 2018 YE2, 2018 XU6, 2018 XH, 2018 XG5, 2018 WN2, 2018 VV1, 2016 BT39, 2015 XA352, 2006 OT9, 2005 BG14, 523824, 523779, 413002, 352102, 234145, 136635, 4596, 3838
291Spacewatch 1.8m telescope in Arizona, 8 in MPEC 2019-C02 -- 2019 BT2, 2019 AP11, 2019 AF11, 2018 XV5, 2017 BQ93, 2014 OM339, 2014 AN51, 2013 RV9
W34Squirrel Valley Obs. in North Carolina, 1 in MPEC 2019-C02 -- 2016 CA136
I52Steward Obs. Mt. Lemmon Station in Arizona, 1 in MPEC 2019-C02 -- 4596
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPECs 2019-C01 & 2019-C02 -- 2017 RL, 2002 JD9
I15Wishing Star Obs. in Rhode Island, 4 in MPEC 2019-C02 -- 2015 BY310, 2012 BC124, 450238, 422787
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 1 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 BC1JPL Sentry1730R E M O V E DJPL: Risk listing removed at 1701 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 1 February '19

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

1945Generated Traffic Report
1730Noted that JPL Sentry has removed 2019 BC1 as an impact risk - see above
Grabbed MPEC 2019-C02 - Daily Orbit Update - see above
0435Grabbed MPEC 2019-C01 - 2017 RL - see above