Contents  on 5 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 5 February '19

Two objects reported inside ten LD

Two minor objects are reported inside ten lunar distances (LD) of our home world today. 2019 BK4 moves in from 4.69 to 4.15 LD and 2019 BR3 is outbound from 5.91 to 8.13 LD.

Neighborhood Traffic - sorted by Earth passage distance, grouped by 1.0, 2.41 & 5.0 LD boundaries
Earth passage I D ~Size Distance today  Inside ten LD Notes
1.6   LD Feb. 2* 2019 BR3 9 m  5.9 to 8.1 LD Jan. 29 - tomorrow EPU +/- 9 mins.*, NHATS target
4.14 LD tomorrow 2019 BK4 13 m  4.15 from 4.69 LD Feb. 1 - 10 NHATS target
Approaching - sorted by 10-LD bubble entry date
7.3   LD Feb. 12* 2017 PV25 41 m  11.5 from 12.6 LD Feb. 7 - 17 EPU +/- 1.07 hours*, NHATS target
7.4   LD Feb. 25* 2019 CJ 24 m  23.1 from 24.3 LD Feb. 19 - March 3 NEW, EPU +/- 48 mins.* - MPEC
* EPU = Earth passage uncertainty

This report was generated at 2040 UTC with the discovery of approaching 2019 CJ (MPEC) and with follow-up in today's DOU MPEC for departed objects 2019 BE5, 2019 BO2, 2019 AB5, and risk-listed 2019 BF5, and for distant 136617 1994 CC.



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 approached Earth within ten LD since A/CC began these traffic reports began twelve years ago but is not currently 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 5 February '19

The MPC's NEO Confirmation Page has 112 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 112 objects listed. Of these, 77 were "one nighters." So far The Tracking News has counted a total of 124 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 5 February '19

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there have been six MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


<< DOU on 5 Feb. '19 >>  MPEC 2019-C29 - "13:11 UT" - Daily Orbit Update


MPEC 2019-C28 - "12:42 UT" - 2019 CJ


MPEC 2019-C27 - "12:38 UT" - 2019 BH5


MPEC 2019-C26 - "11:24 UT" - 2016 FF15


MPEC 2019-C25 - "03:07 UT" - 2019 CE


MPEC 2019-C24 - "01:43 UT" - 2013 MD8

Observers  on 5 February '19

A total of 33 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 13 in MPECs 2019-C25 & 2019-C29 -- 2019 CE, 2019 AY, 2019 AV11, 2019 AS, 2019 AQ6, 2019 AM13, 2018 VS9, 2002 XC91, 1994 NK, 25143, 173664, 159560, 8014
T05ATLAS Haleakala in Hawaii, 27 in MPEC 2019-C29 -- 2019 BK, 2019 BA5, 2019 AW4, 2018 PX23, 2012 OP4, 2005 YY36, 90403, 68950, 523779, 523631, 48603, 376864, 36183, 32906, 325395, 25916, 22771, 21277, 180186, 139359, 5879, 5646, 5143, 4596, 4055, 1917, 1627
T08ATLAS Mauna Loa in Hawaii, 7 in MPEC 2019-C29 -- 2016 AZ8, 419880, 137924, 137805, 137802, 5131, 1620
160Castelmartini Obs. in Italy, 1 in MPEC 2019-C29 -- 2019 BO2
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 4 in MPEC 2019-C29 -- 2019 AZ13, 2019 AS13, 2019 AB5, 2018 VQ9
Z99Clixby Obs. in England, 1 in MPEC 2019-C25 -- 2019 CE
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 4 in MPECs 2019-C25 & 2019-C29 -- 2019 CE, 2019 BE5, 2019 BB5, 99942
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2019-C25 -- 2019 CE
J95Great Shefford Obs. in England, 1 in MPEC 2019-C25 -- 2019 CE
P93JAXA Space Tracking & Communications Center in Japan, 1 in MPEC 2019-C25 -- 2019 CE
K91LCO Sutherland A in South Africa, 1 in MPEC 2019-C29 -- 2005 FC3
K92LCO Sutherland B in South Africa, 1 in MPEC 2019-C29 -- 2005 FC3
H01Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2019-C25 -- 2019 CE
Z22MASTER IAC Obs. in the Canary Islands, 3 in MPEC 2019-C29 -- 523604, 512245, 18736
L52MASTER Tavrida, 1 in MPEC 2019-C29 -- 31210
711McDonald Obs. in Texas, 3 in MPECs 2019-C25, 2019-C27 & 2019-C28 -- 2019 CJ, 2019 CE, 2019 BH5
G96Mt. Lemmon Survey (MLS) in Arizona, 2 in MPECs 2019-C25 & 2019-C27 -- 2019 CE, 2019 BH5
C47Nonndorf Obs. in Austria, 1 in MPEC 2019-C29 -- 2019 BF5
Z80Northolt Branch Obs. in England, 2 in MPEC 2019-C29 -- 2018 VZ9, 2009 SV17
J43Oukaimeden Obs. in Morocco, 2 in MPEC 2019-C29 -- 136923, 1862
F51Pan-STARRS 1 (PS1) in Hawaii, 42 in MPECs 2019-C24, 2019-C26, 2019-C27, 2019-C28 & 2019-C29 -- 2019 CJ, 2019 BQ3, 2019 BH5, 2019 AR5, 2019 AQ9, 2019 AL10, 2018 XU6, 2018 XQ4, 2018 RJ7, 2017 RL, 2016 FF15, 2016 CO246, 2015 QT9, 2015 FT344, 2015 DG200, 2014 YR43, 2014 WV363, 2014 VK2, 2013 MD8, 2013 DR9, 2013 DQ9, 2013 BE18, 2010 PM58, 2002 RT112, 85275, 52761, 523824, 429584, 410778, 357621, 257838, 255501, 241662, 210012, 18736, 162741, 144898, 141670, 136617, 11054, 10302, 6491
F52Pan-STARRS 2 (PS2) in Hawaii, 21 in MPEC 2019-C29 -- 2018 VG8, 2018 RJ7, 2016 CA136, 2012 OP4, 2009 CT, 2007 FE, 65803, 523610, 420591, 39796, 361532, 35396, 352102, 267759, 238063, 16912, 163000, 162361, 7480, 6050, 5587
A53Peschiera del Garda Obs. in Italy, 2 in MPEC 2019-C29 -- 2018 TS, 2012 BN11
H36Sandlot Obs. in Kansas, 2 in MPECs 2019-C25 & 2019-C28 -- 2019 CJ, 2019 CE
C95SATINO-1 in France, 1 in MPEC 2019-C29 -- 265661
033Schwarzschild Obs. in Germany, 6 in MPECs 2019-C25 & 2019-C29 -- 2019 CE, 2019 BF1, 2019 BE5, 2019 BB5, 2019 AW11, 2019 AQ9
0941program code 1 via Simeis Obs. in Ukraine, 1 in MPEC 2019-C29 -- 2019 BF5
G40!M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-C29 -- 2019 AP3
G40'program code "'" (16) via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-C29 -- 2012 BN11
G40*program code "*" (19) via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-C29 -- 2019 BF5
W34Squirrel Valley Obs. in North Carolina, 1 in MPEC 2019-C25 -- 2019 CE
I52Steward Obs. Mt. Lemmon Station in Arizona, 2 in MPECs 2019-C25 & 2019-C27 -- 2019 CE, 2019 BH5
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2019-C29 -- 302169
L01Visnjan Obs., 3 in MPECs 2019-C25, 2019-C27 & 2019-C28 -- 2019 CJ, 2019 CE, 2019 BH5
C51WISE in Earth polar orbit, 7 in MPEC 2019-C29 -- 2018 KV, 2015 XC1, 2011 OL5, 523619, 363067, 329395, 9162
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 5 February '19

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2359 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 BE5JPL Sentry18072038-2114101.297606e-05-4.58-4.660JPL: Computed at 10:01 today Pacific time based on 68 observations spanning 4.5624 days (2019-Jan-31.324536 to 2019-Feb-04.88694). Diameter approximately 0.033 km. from weighted mean H=25.06.
2019 BB5JPL Sentry1730R E M O V E DJPL: Risk listing removed at 1713 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 5 February '19

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

2040Generated Traffic Report
1807Noted that JPL Sentry has updated its 2019 BE5 risk assessment - see above
1730Noted that JPL Sentry has removed 2019 BB5 as an impact risk - see above
Grabbed MPEC 2019-C26 - 2016 FF15 - see above
Grabbed MPEC 2019-C27 - 2019 BH5 - see above
Grabbed MPEC 2019-C28 - 2019 CJ - see above
Grabbed MPEC 2019-C29 - Daily Orbit Update - see above
0515Grabbed MPEC 2019-C24 - 2013 MD8 - see above
Grabbed MPEC 2019-C25 - 2019 CE - see above