Contents  on 2 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 2 February '19

Nine objects reported inside ten LD

Nine small visitors are reported inside ten lunar distances (LD) of our planet today. The nearest, within Earth's sphere of gravitational influence, is 2019 BR3, which comes its closest to us this time around, reaching about 1.59 LD* at 1159 UTC, and its closest to the Moon -- 1.55 LD* at 2305 UTC.

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 today* 2019 BR3 9 m  1.6 LD Jan. 29 - Feb. 6 EPU +/- 10 mins.*, NHATS target, Earth closest
at 1159 UTC, Moon closest 1.55 LD at 2305 UTC
2.57 LD Jan. 30 2019 BL4 9 m  7.49 to 9.90 LD Jan. 26 - tomorrow
2.84 LD Jan. 30 2019 BD5 15 m  7.77 to 10.14 LD Jan. 26 - today NEW, exits ten LD - MPEC
3.05 LD Jan. 30 2019 BE5 33 m  7.26 to 10.07 LD Jan. 27 - today NEW, exits ten LD - MPEC
3.13 LD Jan. 26 2019 BU3 5 m  7.54 to 8.49 LD Jan. 16 - Feb. 4 NHATS target
3.42 LD Jan. 30 2019 BJ1 37 m  9.03 to 12.60 LD Jan. 28 - today exits ten LD
4.1   LD Feb. 6* 2019 BK4 13 m  7.6 from 9.4 LD yesterday - Feb. 10 EPU +/- 17 mins.*, NHATS target
5.00 LD Jan. 29 2019 BY3 11 m  8.04 to 9.63 LD Jan. 25 - tomorrow
7.02 LD today 2019 BC5 28 m  7.02 LD Jan. 31 - tomorrow NEW, Earth closest at 0410 UTC - MPEC
* EPU = Earth passage uncertainty

This report was updated at 2356 UTC with four new discoveries: passing 2019 BC5 (MPEC), outbound 2019 BE5 (MPEC) and 2019 BD5 (MPEC), and departed 2019 BY4 (MPEC), which flew by at about 9.10 LD on January 23rd. Your first neighborhood asteroid traffic report was generated at 1820 UTC with follow-up in today's DOU MPEC for departed risk-listed 2019 BU1 along with astrometry from mid-January for 2019 AG7.

Approaching
7.3   LD Feb. 12* 2017 PV25 41 m  15.0 from 16.3 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. "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 2 February '19

The MPC's NEO Confirmation Page has 46 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 46 objects listed. Of these, 38 were "one nighters." So far The Tracking News has counted a total of 55 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 2 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-C10 - "21:37 UT" - 2019 BE5


MPEC 2019-C09 - "21:33 UT" - 2019 BC5


MPEC 2019-C08 - "21:29 UT" - 2019 BD5


MPEC 2019-C07 - "21:26 UT" - 2019 BB5


MPEC 2019-C06 - "21:22 UT" - 2019 BA5


MPEC 2019-C05 - "21:17 UT" - 2019 BZ4


MPEC 2019-C04 - "21:12 UT" - 2019 BY4


<< DOU on 2 Feb. '19 >>  MPEC 2019-C03 - "13:10 UT" - Daily Orbit Update

Observers  on 2 February '19

A total of 30 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 7 in MPECs 2019-C04, 2019-C05, 2019-C06, 2019-C07, 2019-C08, 2019-C09 & 2019-C10 -- 2019 BZ4, 2019 BY4, 2019 BE5, 2019 BD5, 2019 BC5, 2019 BB5, 2019 BA5
T08ATLAS Mauna Loa in Hawaii, 1 in MPEC 2019-C03 -- 12538
703Catalina Sky Survey (CSS) in Arizona, 6 in MPECs 2019-C03, 2019-C04 & 2019-C06 -- 2019 BY4, 2019 BA5, 325395, 244670, 228502, 21277
Z99Clixby Obs. in England, 3 in MPECs 2019-C04, 2019-C05 & 2019-C08 -- 2019 BZ4, 2019 BY4, 2019 BD5
W46Foxfire Village Obs., 1 in MPEC 2019-C03 -- 18736
J95Great Shefford Obs. in England, 5 in MPECs 2019-C04, 2019-C05, 2019-C06, 2019-C07 & 2019-C10 -- 2019 BZ4, 2019 BY4, 2019 BE5, 2019 BB5, 2019 BA5
A91Hankasalmi Obs. in Finland, 1 in MPEC 2019-C10 -- 2019 BE5
C43Hoyerswerda Obs. in Germany, 1 in MPEC 2019-C08 -- 2019 BD5
H06#M. Suzuki in Japan via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2019-C10 -- 2019 BE5
P93JAXA Space Tracking & Communications Center (JAXA STCC) in Japan, 5 in MPECs 2019-C04, 2019-C06, 2019-C08, 2019-C09 & 2019-C10 -- 2019 BY4, 2019 BE5, 2019 BD5, 2019 BC5, 2019 BA5
H01Magdalena Ridge Obs. (MRO) in New Mexico, 7 in MPECs 2019-C04, 2019-C05, 2019-C06, 2019-C07, 2019-C08, 2019-C09 & 2019-C10 -- 2019 BZ4, 2019 BY4, 2019 BE5, 2019 BD5, 2019 BC5, 2019 BB5, 2019 BA5
711McDonald Obs. in Texas, 18 in MPECs 2019-C03, 2019-C04, 2019-C05, 2019-C06, 2019-C08 & 2019-C10 -- 2019 BZ4, 2019 BY4, 2019 BJ2, 2019 BE5, 2019 BD5, 2019 BA5, 2019 AY13, 2019 AT4, 2019 AR4, 2019 AN6, 2019 AM3, 2019 AL7, 2019 AK7, 2019 AD11, 2018 XK5, 2018 VG8, 2016 PT8, 455184
V01Mountainville Obs. in Utah, 2 in MPECs 2019-C03 & 2019-C08 -- 2019 BD5, 2019 AV2
474Mt. John Obs. in New Zealand, 2 in MPECs 2019-C04 & 2019-C06 -- 2019 BY4, 2019 BA5
G96Mt. Lemmon Survey (MLS) in Arizona, 6 in MPECs 2019-C03, 2019-C05 & 2019-C07 -- 2019 BZ4, 2019 BB5, 2010 AK, 523805, 242147, 136793
K74Muensterschwarzach Obs. in Germany, 1 in MPEC 2019-C08 -- 2019 BD5
G34Oberfrauendorf Obs. in Germany, 2 in MPECs 2019-C08 & 2019-C10 -- 2019 BE5, 2019 BD5
J43Oukaimeden Obs. in Morocco, 1 in MPEC 2019-C03 -- 18736
I41Palomar Transient Factory (PTF) in southern California, 3 in MPECs 2019-C08, 2019-C09 & 2019-C10 -- 2019 BE5, 2019 BD5, 2019 BC5
H36Sandlot Obs. in Kansas, 1 in MPEC 2019-C10 -- 2019 BE5
C95SATINO-1 in France, 1 in MPEC 2019-C03 -- 228368
033Schwarzschild Obs. in Germany, 6 in MPECs 2019-C04, 2019-C05, 2019-C06, 2019-C07, 2019-C08 & 2019-C09 -- 2019 BZ4, 2019 BY4, 2019 BD5, 2019 BC5, 2019 BB5, 2019 BA5
G40!M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-C03 -- 2019 AV2
G40'program code "'" (16) via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-C03 -- 2015 VY150
G40,program code "," (21) via Slooh.com Canary Islands Obs. in the Canary Islands, 2 in MPEC 2019-C03 -- 2019 AG7, 515767
291Spacewatch 1.8m telescope in Arizona, 2 in MPEC 2019-C03 -- 2019 BF1, 2019 AV
W34Squirrel Valley Obs. in North Carolina, 1 in MPEC 2019-C08 -- 2019 BD5
I52Steward Obs. Mt. Lemmon Station in Arizona, 1 in MPEC 2019-C10 -- 2019 BE5
381Tokyo-Kiso Obs. in Japan, 1 in MPEC 2019-C10 -- 2019 BE5
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 4 in MPEC 2019-C03 -- 2019 BU1, 2018 YH, 2017 QF17, 2016 PX66
718Wiggins Obs. in Utah, 1 in MPEC 2019-C10 -- 2019 BE5
C51WISE in Earth polar orbit, 1 in MPEC 2019-C03 -- 2014 AA33
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 2 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 BB5JPL Sentry23012102-210216.912e-08-8.38-8.380JPL: Computed at 14:40 today Pacific time based on 47 observations spanning 2.9425 days (2019-Jan-30.35613 to 2019-Feb-02.298594). Diameter approximately 0.015 km. from weighted mean H=26.80.
2019 BU1NEODyS18302056-206228.43e-07-6.49-6.530NEODyS: "Based on 51 optical observations (of which 1 are rejected as outliers) from 2019-01-25.328 to 2019-02-01.416."
JPL Sentry16502056-206221.6808e-06-6.17-6.210JPL: Computed at 08:09 today Pacific time based on 51 observations spanning 7.0885 days (2019-Jan-25.32671 to 2019-Feb-01.415181). Diameter approximately 0.020 km. from weighted mean H=26.14.
2019 BC1NEODyS1830R E M O V E D-

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 2 February '19

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

2356Updated Traffic Report
2301Noted that JPL Sentry has posted 2019 BB5 as an impact risk - see above
2157Grabbed MPEC 2019-C09 - 2019 BC5 - see above
Grabbed MPEC 2019-C10 - 2019 BE5 - see above
2134Grabbed MPEC 2019-C04 - 2019 BY4 - see above
Grabbed MPEC 2019-C05 - 2019 BZ4 - see above
Grabbed MPEC 2019-C06 - 2019 BA5 - see above
Grabbed MPEC 2019-C07 - 2019 BB5 - see above
Grabbed MPEC 2019-C08 - 2019 BD5 - see above
1830Noted that NEODyS has removed 2019 BC1 as an impact risk - see above
Noted that NEODyS has updated its 2019 BU1 risk assessment - see above
1650Noted that JPL Sentry has updated its 2019 BU1 risk assessment - see above
Grabbed MPEC 2019-C03 - Daily Orbit Update - see above