Contents  on 29 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 29 January '19

Fifteen objects reported inside ten LD

Fifteen asteroidal objects are reported within ten lunar distances (LD) of our planet today. Nearest of these are newly announced risk-listed intruder 2019 BZ3, moving out from 2.47 to 4.86 LD (after flying by at 0.13 LD on January 27th), 2019 BR2, outbound from 2.84 to 5.48 LD, and 2019 BG3, which comes its closest to Earth on this passage -- reaching 3.36 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  2.47 to 4.86 LD Jan. 23 - Feb. 1 NEW, intruder, risk - MPEC, DOU
1.6   LD Feb. 2* 2019 BR3 9 m  8.2 from 10.5 LD today - Feb. 6 NEW, EPU +/- 10 mins.*, enters ten LD - MPEC
1.71 LD yesterday 2019 BR2 8 m  2.84 to 5.48 LD Jan. 24 - 31
2.99 LD Jan. 25 2019 BM2 20 m  9.93 to 12.39 LD Jan. 21 - 29 exits ten LD
3.15 LD Jan. 26 2019 BU3 5 m  4.19 to 4.94 LD Jan. 17 - Feb. 4 NEW, risk - MPEC
3.28 LD Jan. 27 2019 BQ2 14 m  4.83 to 7.31 LD Jan. 24 - 30
3.36 LD today 2019 BG3 20 m  3.36 LD Jan. 27 - 30 Earth closest at 0152 UTC - DOU
3.42 LD tomorrow 2019 BJ1 37 m  4.50 from 7.51 LD yesterday - Feb. 2 DOU
4.76 LD Jan. 27 2019 BS2 12 m  5.40 to 6.77 LD Jan. 24 - 31
5.00 LD today 2019 BY3 11 m  5.00 LD Jan. 25 - Feb. 3 NEW, Earth closest at 1812 UTC - MPEC
5.75 LD Jan. 26 2019 AA10 24 m  8.65 to 10.48 LD Jan. 22 - 29 exits ten LD - DOU
6.96 LD Jan. 23 2019 AS11 15 m  9.02 to 9.65 LD Jan. 15 - 30 NHATS target
7.3   LD Jan. 26* 2019 AQ14 13 m  8.9 to 10.2 LD Jan. 23 - 29 EPU +/- 1.97 hours*, NHATS target, exits ten LD
7.6   LD Jan. 25* 2019 AJ13 8 m  9.3 to 10.1 LD Jan. 20 - 29 EPU +/- 5 mins.*, NHATS target, exits ten LD
9.11 LD yesterday 2019 BV2 29 m  9.11 to 9.81 LD Jan. 27 - 30 risk
* EPU = Earth passage uncertainty

This report was generated at 2115 UTC with six new discoveries: inbound 2019 BR3 (MPEC), passing 2019 BY3 (MPEC), two outbound risk-listed objects -- 2019 BU3 (MPEC) and intruder 2019 BZ3 (MPEC, DOU), and two departed objects with major uncertainty in their passage times and distances -- 2019 AX14 (DOU), which may have passed at about 5.1 LD* January 23rd (uncertainty +/- 21.45 hours), and risk-listed 2019 BX1 (DOU), at about 1.4 LD* on January 8th (+/- 8.83 hours). Today's DOU MPEC has follow-up for inbound 2019 BJ1, passing 2019 BG3, outbound 2019 AA10, and departed objects 2019 AR2, 2019 BE1, 2019 BK2, and risk-listed 2019 BZ, plus astrometry from early December for 163899 2003 SD220.

Approaching
7.3   LD Feb. 12* 2017 PV25 41 m  20.2 from 21.6 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.

Radar Astrometry  on 29 January '19

Radar observation of one object

The JPL Solar System Dynamics Group Radar Astrometry database has added or updated the following small-body radar observing work:


Data update noted at 0208 UTC when the database was dated 28 Jan.



Photometry and some astrometry is needed for upcoming radar targets. See Arecibo and Goldstone schedules.

NEOCP Activity  on 29 January '19

The MPC's NEO Confirmation Page has 66 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 66 objects listed. Of these, 40 were "one nighters." So far The Tracking News has counted a total of 82 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 29 January '19

Minor Planet Electronic Circulars

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


<< DOU on 29 Jan. '19 >>  MPEC 2019-B143 - "13:11 UT" - Daily Orbit Update


MPEC 2019-B142 - "12:24 UT" - 2019 BZ3


MPEC 2019-B141 - "12:20 UT" - 2019 BV3


MPEC 2019-B140 - "12:16 UT" - 2019 BU3


MPEC 2019-B139 - "12:12 UT" - 2019 BY3


MPEC 2019-B138 - "12:08 UT" - 2019 BX3


MPEC 2019-B137 - "12:03 UT" - 2019 BW3


MPEC 2019-B136 - "11:59 UT" - 2019 BT3


MPEC 2019-B135 - "11:55 UT" - 2019 BS3


MPEC 2019-B134 - "11:51 UT" - 2019 BR3


MPEC 2019-B133 - "11:46 UT" - 2019 BQ3


MPEC 2019-B132 - "03:27 UT" - 2016 MB


MPEC 2019-B131 - "03:24 UT" - 2014 AF51


MPEC 2019-B130 - "03:22 UT" - 2013 DR9

Observers  on 29 January '19

A total of 44 observers appear in today's MPECs.

CodeObserver / observatory
251Arecibo in Puerto Rico, 1 in radar -- 2019 AV2
H21Astronomical Research Obs. Westfield in Illinois, 1 in MPEC 2019-B143 -- 2019 AS8
T08ATLAS Mauna Loa in Hawaii, 1 in MPEC 2019-B143 -- 180186
V03Big Water Obs. in Utah, 1 in MPEC 2019-B136 -- 2019 BT3
B66Casasco Obs. in Italy, 6 in MPEC 2019-B143 -- 2019 AV2, 2019 AR2, 2018 VB9, 2018 TC3, 2016 AZ8, 1620
160Castelmartini Obs. in Italy, 12 in MPEC 2019-B143 -- 2009 SV17, 515767, 512245, 511684, 459462, 458122, 454177, 31210, 267221, 137925, 137802, 136793
703Catalina Sky Survey (CSS) in Arizona, 2 in MPECs 2019-B141 & 2019-B143 -- 2019 BV3, 2019 BE1
V06Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) in Arizona, 3 in MPECs 2019-B136 & 2019-B143 -- 2019 BX1, 2019 BT3, 2019 AR11
107Cavezzo Obs. in Italy, 1 in MPEC 2019-B143 -- 512245
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 9 in MPECs 2019-B132 & 2019-B143 -- 2019 BK2, 2019 AY4, 2019 AR3, 2019 AO7, 2019 AL7, 2019 AE11, 2019 AA14, 2018 XL5, 2016 MB
Z99Clixby Obs. in England, 1 in MPEC 2019-B138 -- 2019 BX3
W84%program code "%" (14) via DECam in Chile, 1 in MPEC 2019-B143 -- 2015 KA158
L05Dridri Obs. in Italy, 1 in MPEC 2019-B143 -- 454177
734Farpoint Obs. in Kansas, 1 in MPEC 2019-B134 -- 2019 BR3
K83Forti Obs., 2 in MPEC 2019-B143 -- 512245, 454177
E89Geyserland Obs. in New Zealand, 2 in MPEC 2019-B143 -- 180186, 141484
203GiaGa Obs. in Italy, 1 in MPEC 2019-B138 -- 2019 BX3
J95Great Shefford Obs. in England, 6 in MPECs 2019-B133, 2019-B136, 2019-B138, 2019-B139 & 2019-B143 -- 2019 BY3, 2019 BX3, 2019 BT3, 2019 BQ3, 2019 BG3, 419880
Q62`Steven M. Tilley in Louisiana via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2019-B143 -- 89959
K91LCO Sutherland A in South Africa, 1 in MPEC 2019-B143 -- 2013 CW32
K38M57 Obs. in Italy, 2 in MPEC 2019-B143 -- 2019 BW1, 2019 AV2
H01Magdalena Ridge Obs. (MRO) in New Mexico, 4 in MPECs 2019-B135, 2019-B137, 2019-B139 & 2019-B141 -- 2019 BY3, 2019 BW3, 2019 BV3, 2019 BS3
Z22MASTER IAC Obs. in the Canary Islands, 1 in MPEC 2019-B143 -- 512245
568^R. Wainscoat on Mauna Kea in Hawaii, 4 in MPEC 2019-B143 -- 2019 AX14, 2019 AV14, 2019 AU14, 2019 AT14
474Mt. John Obs. in New Zealand, 5 in MPEC 2019-B143 -- 2019 BF, 2019 AW13, 2019 AV9, 2019 AT3, 2019 AA14
G96Mt. Lemmon Survey (MLS) in Arizona, 10 in MPECs 2019-B133, 2019-B134, 2019-B135, 2019-B136, 2019-B137, 2019-B138, 2019-B140, 2019-B141, 2019-B142 & 2019-B143 -- 2019 BZ3, 2019 BX3, 2019 BX1, 2019 BW3, 2019 BV3, 2019 BU3, 2019 BT3, 2019 BS3, 2019 BR3, 2019 BQ3
Z80Northolt Branch Obs. in England, 3 in MPEC 2019-B143 -- 2019 BG3, 515767, 512245
I41Palomar Transient Factory (PTF) in southern California, 13 in MPECs 2019-B139, 2019-B140 & 2019-B143 -- 2019 BY3, 2019 BU3, 2019 BG2, 2019 AA10, 2018 YA3, 2012 BC124, 2007 NL1, 457260, 409204, 318411, 20460, 138524, 137805
F51Pan-STARRS 1 (PS1) in Hawaii, 8 in MPECs 2019-B137 & 2019-B143 -- 2019 BX1, 2019 BW3, 2019 AY14, 2019 AX14, 2019 AV14, 2019 AU14, 2019 AT14, 2013 BC70
D29Purple Mtn. Obs. Xuyi Station in China, 1 in MPEC 2019-B143 -- 512245
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2019-B143 -- 2019 BG1
H36Sandlot Obs. in Kansas, 1 in MPEC 2019-B133 -- 2019 BQ3
C95SATINO-1 in France, 1 in MPEC 2019-B143 -- 163899
204Schiaparelli Obs. in Italy, 4 in MPECs 2019-B133, 2019-B137, 2019-B138 & 2019-B139 -- 2019 BY3, 2019 BX3, 2019 BW3, 2019 BQ3
E12Siding Spring Survey in New South Wales, 1 in MPEC 2019-B143 -- 2016 MB
0948program code 8 via Simeis Obs. in Ukraine, 1 in MPEC 2019-B143 -- 454177
587Sormano Obs. in Italy, 8 in MPECs 2019-B133, 2019-B136, 2019-B137, 2019-B138, 2019-B140, 2019-B142 & 2019-B143 -- 2019 BZ3, 2019 BZ, 2019 BX3, 2019 BW3, 2019 BU3, 2019 BT3, 2019 BQ3, 2012 BC124
691Spacewatch 0.9m telescope in Arizona, 3 in MPECs 2019-B133 & 2019-B143 -- 2019 BQ3, 2015 YE21, 523633
291Spacewatch 1.8m telescope in Arizona, 7 in MPEC 2019-B143 -- 2019 BZ, 2019 BP1, 2019 AY3, 2018 XH, 2018 VE4, 2013 BC70, 2010 LU134
I52Steward Obs. Mt. Lemmon Station in Arizona, 15 in MPECs 2019-B130, 2019-B133, 2019-B135, 2019-B136, 2019-B137, 2019-B138, 2019-B141, 2019-B142 & 2019-B143 -- 2019 BZ3, 2019 BX3, 2019 BW3, 2019 BV3, 2019 BT3, 2019 BS3, 2019 BQ3, 2019 BB1, 2019 AR2, 2019 AO10, 2019 AC5, 2018 YA3, 2018 XY2, 2018 VZ9, 2013 DR9
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 4 in MPECs 2019-B131 & 2019-B143 -- 2018 YW2, 2018 VZ7, 2014 AF51, 2009 SY
K41Vegaquattro Obs. in Italy, 1 in MPEC 2019-B143 -- 2019 BJ1
L01Visnjan Obs., 1 in MPEC 2019-B142 -- 2019 BZ3
I15Wishing Star Obs. in Rhode Island, 2 in MPEC 2019-B143 -- 511684, 458122
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 29 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 BZ3JPL Sentry18002092-209212.321e-10-11.60-11.60JPL: Computed at 08:24 today Pacific time based on 26 observations spanning .99526 days (2019-Jan-28.42761 to 2019-Jan-29.42287). Diameter approximately 0.006 km. from weighted mean H=28.67.
NEODyS1800209226.42e-09-10.18-10.190NEODyS: "Based on 26 optical observations (of which 0 are rejected as outliers) from 2019-01-28.428 to 2019-01-29.424."
2019 BU3NEODyS1800211012.0e-09-11.21-11.210NEODyS: "Based on 14 optical observations (of which 3 are rejected as outliers) from 2019-01-27.289 to 2019-01-28.874."
2019 BD3NEODyS1800208914.48e-08-7.92-7.920NEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2019-01-26.447 to 2019-01-28.391."
2019 BX1JPL Sentry18002077-211525.625958e-07-8.26-8.260JPL: Computed at 08:31 today Pacific time based on 11 observations spanning .80229 days (2019-Jan-16.64074 to 2019-Jan-17.44303). Diameter approximately 0.008 km. from weighted mean H=28.14.
NEODyS1800211514.98e-09-10.33-10.330NEODyS: "Based on 12 optical observations (of which 0 are rejected as outliers) from 2019-01-16.642 to 2019-01-17.444."
2019 BP1JPL Sentry18002037-209531.37652e-08-5.35-5.580JPL: Computed at 08:28 today Pacific time based on 24 observations spanning 3.7267 days (2019-Jan-23.57625 to 2019-Jan-27.30295). Diameter approximately 0.391 km. from weighted mean H=19.70.
NEODyS18002033-2104111.17e-08-5.04-5.440NEODyS: "Based on 24 optical observations (of which 0 are rejected as outliers) from 2019-01-23.577 to 2019-01-27.304."
2019 BZJPL Sentry18002077-2119212.7186896e-05-6.01-6.180JPL: Computed at 08:28 today Pacific time based on 33 observations spanning 5.1979 days (2019-Jan-24.180448 to 2019-Jan-29.37838). Diameter approximately 0.010 km. from weighted mean H=27.55.
NEODyS18002067-2118342.26e-05-6.11-6.46-NEODyS: "Based on 34 optical observations (of which 3 are rejected as outliers) from 2019-01-24.181 to 2019-01-29.379."
2019 AU14JPL Sentry18002023-2095151.35848e-08-5.14-5.300JPL: Computed at 08:22 today Pacific time based on 9 observations spanning 1.9398 days (2019-Jan-11.46545 to 2019-Jan-13.405228). Diameter approximately 0.230 km. from weighted mean H=20.87.
NEODyS18002023-211668.34e-10-6.17-6.290NEODyS: "Based on 9 optical observations (of which 0 are rejected as outliers) from 2019-01-11.466 to 2019-01-13.406."
2019 AF14JPL Sentry0022R E M O V E DJPL: Risk listing removed at 0005 UTC today
2018 YW2JPL Sentry18002050-208133.9014e-07-6.06-6.080JPL: Computed at 08:11 today Pacific time based on 58 observations spanning 17.133 days (2018-Dec-31.52399 to 2019-Jan-17.657165). Diameter approximately 0.054 km. from weighted mean H=24.00.
NEODyS18002050-208161.46e-07-6.51-6.530NEODyS: "Based on 58 optical observations (of which 0 are rejected as outliers) from 2018-12-31.525 to 2019-01-17.658."
2015 KA158JPL Sentry1800R E M O V E DJPL: Risk listing removed at 1603 UTC today
NEODyS1800R 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 29 January '19

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

2115Generated Traffic Report
1800Noted that JPL Sentry has removed 2015 KA158 as an impact risk - see above
Noted that NEODyS has removed 2015 KA158 as an impact risk - see above
Noted that JPL Sentry has updated its 2018 YW2 risk assessment - see above
Noted that NEODyS has updated its 2018 YW2 risk assessment - see above
Noted that JPL Sentry has posted 2019 AU14 as an impact risk - see above
Noted that NEODyS has posted 2019 AU14 as an impact risk - see above
Noted that NEODyS has posted 2019 BD3 as an impact risk - see above
Noted that JPL Sentry has updated its 2019 BP1 risk assessment - see above
Noted that NEODyS has updated its 2019 BP1 risk assessment - see above
Noted that NEODyS has posted 2019 BU3 as an impact risk - see above
Noted that JPL Sentry has posted 2019 BX1 as an impact risk - see above
Noted that NEODyS has posted 2019 BX1 as an impact risk - see above
Noted that JPL Sentry has updated its 2019 BZ risk assessment - see above
Noted that NEODyS has updated its 2019 BZ risk assessment - see above
Noted that JPL Sentry has posted 2019 BZ3 as an impact risk - see above
Noted that NEODyS has posted 2019 BZ3 as an impact risk - see above
Grabbed MPEC 2019-B133 - 2019 BQ3 - see above
Grabbed MPEC 2019-B134 - 2019 BR3 - see above
Grabbed MPEC 2019-B135 - 2019 BS3 - see above
Grabbed MPEC 2019-B136 - 2019 BT3 - see above
Grabbed MPEC 2019-B137 - 2019 BW3 - see above
Grabbed MPEC 2019-B138 - 2019 BX3 - see above
Grabbed MPEC 2019-B139 - 2019 BY3 - see above
Grabbed MPEC 2019-B140 - 2019 BU3 - see above
Grabbed MPEC 2019-B141 - 2019 BV3 - see above
Grabbed MPEC 2019-B142 - 2019 BZ3 - see above
Grabbed MPEC 2019-B143 - Daily Orbit Update - see above
0609Grabbed MPEC 2019-B130 - 2013 DR9 - see above
Grabbed MPEC 2019-B131 - 2014 AF51 - see above
Grabbed MPEC 2019-B132 - 2016 MB - see above
0208Noted Radar Astrometry database update - see above
0022Noted that JPL Sentry has removed 2019 AF14 as an impact risk - see above