Contents  on 27 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 27 January '19

Twelve objects reported inside ten LD

Bulletin - 2337 UTC:  Two new discoveries of close passers have been announced.

Earth passageI D~Size~Inside ten LDNotes
9.11 LD at 2105 UTC tomorrow2019 BV229 m today - Jan. 30MPEC
9.22 LD at 0329 UTC Jan. 232019 BU229 m Jan. 21 - 25MPEC


There are twelve minor objects reported to be less than ten lunar distances (LD) from our home world today. Nearest are two newly announced objects. 2019 BR2 enters Earth's sphere of gravitational influence, sliding in from 3.99 to 1.83 LD, and 2019 BQ2 comes its closest to Earth this time around, reaching 3.28 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
0.35 LD Jan. 24 2019 BV1 6 m  6.82 to 10.01 LD Jan. 21 - 27 NEW, intruder, exits ten LD - MPEC
1.71 LD tomorrow 2019 BR2 8 m  1.83 from 3.99 LD Jan. 24 - 31 NEW, enters Earth SOI - MPEC
2.44 LD Jan. 23 2019 BZ 11 m  6.91 to 8.79 LD Jan. 18 - 28 NHATS target, risk - DOU
2.84 LD Jan. 25 2019 BK2 15 m  6.67 to 9.75 LD Jan. 22 - 28 NEW - MPEC
2.99 LD Jan. 25 2019 BM2 19 m  5.28 to 7.53 LD Jan. 21 - 29 NEW - MPEC
3.28 LD today 2019 BQ2 13 m  3.28 LD Jan. 24 - 30 NEW, Earth closest at 1929 UTC - MPEC
4.76 LD today 2019 BS2 12 m  4.76 LD Jan. 24 - 31 NEW, Earth closest at 2111 UTC - MPEC
5.75 LD yesterday 2019 AA10 24 m  6.04 to 7.09 LD Jan. 22 - 29 DOU
6.96 LD Jan. 23 2019 AS11 15 m  7.94 to 8.45 LD Jan. 15 - 30 NHATS target
7.3   LD yesterday* 2019 AQ14 13 m  7.4 to 7.9 LD Jan. 23 - 29 EPU +/- 1.97 hours*, NHATS target
7.6   LD Jan. 25* 2019 AJ13 8 m  8.0 to 8.6 LD Jan. 20 - 29 EPU +/- 5 mins.*, NHATS target
8.59 LD Jan. 25 2019 AG11 19 m  8.95 to 9.56 LD Jan. 22 - 28
* EPU = Earth passage uncertainty

This report was generated at 2305 UTC with eleven discoveries to report. Three are from late yesterday and the rest from today. Six of these, including an intruder, are in the active traffic table above (see for details) and five have already departed. They are risk-listed 2019 BU1 (MPEC), which came to 2.98 LD on January 22nd, 2019 BS1 (MPEC) -- 6.91 LD the same day, 2019 BP2 (MPEC) -- 4.86 LD on Januray 20th, 2019 BO2 (MPEC) -- 6.71 LD on the 24th, and 2019 BN2 (MPEC) -- 4.50 LD on the 21st. Today's DOU MPEC has follow-up for approaching 2019 BJ1, outbound 2019 BZ and 2019 AA10, and departed 2019 BE1 and 2019 AR2.

Approaching - sorted by 10-LD bubble entry date
3.42 LD Jan. 30 2019 BJ1 38 m  10.99 from 14.61 LD tomorrow - Feb. 2 DOU
7.3   LD Feb. 12* 2017 PV25 41 m  23.0 from 24.4 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 27 January '19

The MPC's NEO Confirmation Page has 74 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 74 objects listed. Of these, 54 were "one nighters." So far The Tracking News has counted a total of 111 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 27 January '19

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there have been 20 MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2019-B119 - "22:45 UT" - 2019 BV2


MPEC 2019-B118 - "22:40 UT" - 2019 BU2


MPEC 2019-B117 - "22:36 UT" - 2019 BT2


MPEC 2019-B116 - "22:32 UT" - 2011 AL1


<< DOU on 27 Jan. '19 >>  MPEC 2019-B115 - "13:16 UT" - Daily Orbit Update


MPEC 2019-B114 - "12:58 UT" - 2019 BM2


MPEC 2019-B113 - "12:54 UT" - 2019 BK2


MPEC 2019-B112 - "12:50 UT" - 2019 BF2


MPEC 2019-B111 - "12:45 UT" - 2019 BS2


MPEC 2019-B110 - "12:41 UT" - 2019 BR2


MPEC 2019-B109 - "12:37 UT" - 2019 BQ2


MPEC 2019-B108 - "12:33 UT" - 2019 BP2


MPEC 2019-B107 - "12:29 UT" - 2019 BO2


MPEC 2019-B106 - "12:24 UT" - 2019 BN2


MPEC 2019-B105 - "12:20 UT" - 2019 BL2


MPEC 2019-B104 - "12:16 UT" - 2019 BJ2


MPEC 2019-B103 - "12:12 UT" - 2019 BH2


MPEC 2019-B102 - "12:08 UT" - 2019 BG2


MPEC 2019-B101 - "12:03 UT" - 2019 AZ14


MPEC 2019-B100 - "00:56 UT" - 2019 BW1

Observers  on 27 January '19

A total of 36 observers appear in today's MPECs.

CodeObserver / observatory
T05ATLAS Haleakala in Hawaii, 4 in MPEC 2019-B115 -- 2019 AV2, 2018 VB9, 2016 CA136, 2009 SV17
T08ATLAS Mauna Loa in Hawaii, 13 in MPECs 2019-B115 & 2019-B118 -- 2019 BU2, 2019 BE1, 454177, 419880, 21277, 21088, 180186, 154652, 12538, 6455, 3199, 1864, 1036
V03Big Water Obs. in Utah, 5 in MPECs 2019-B103, 2019-B107, 2019-B108, 2019-B109 & 2019-B119 -- 2019 BV2, 2019 BQ2, 2019 BP2, 2019 BO2, 2019 BH2
160Castelmartini Obs. in Italy, 7 in MPECs 2019-B100 & 2019-B115 -- 2019 BW1, 2003 NW1, 523595, 33342, 325395, 18109, 433
703Catalina Sky Survey (CSS) in Arizona, 7 in MPECs 2019-B100, 2019-B102, 2019-B103, 2019-B114 & 2019-B115 -- 2019 BW1, 2019 BM2, 2019 BH2, 2019 BG2, 2019 BE1, 2019 AR2, 523811
V06Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) in Arizona, 8 in MPECs 2019-B104 & 2019-B115 -- 2019 BJ2, 2019 AV11, 2019 AQ6, 2019 AH2, 2019 AE13, 2019 AC13, 2018 XH2, 2016 EZ27
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 13 in MPECs 2019-B101, 2019-B112, 2019-B115 & 2019-B117 -- 2019 BT2, 2019 BK, 2019 BF2, 2019 AZ14, 2019 AY8, 2019 AW13, 2019 AT3, 2019 AL2, 2019 AJ7, 2018 XV5, 2018 XB20, 2018 RL, 2018 PX19
L29Drebach-South Obs., 2 in MPECs 2019-B100 & 2019-B114 -- 2019 BW1, 2019 BM2
L05Dridri Obs. in Italy, 1 in MPEC 2019-B115 -- 18736
595Farra d'Isonzo Obs. in Italy, 2 in MPECs 2019-B100 & 2019-B115 -- 2019 BW1, 523604
K83Forti Obs., 2 in MPEC 2019-B115 -- 5131, 1620
E89Geyserland Obs. in New Zealand, 2 in MPEC 2019-B115 -- 88263, 12538
203GiaGa Obs. in Italy, 1 in MPEC 2019-B100 -- 2019 BW1
J95Great Shefford Obs. in England, 3 in MPECs 2019-B116, 2019-B118 & 2019-B119 -- 2019 BV2, 2019 BU2, 2011 AL1
Q62`Steven M. Tilley in Louisiana via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2019-B115 -- 2019 BK
P93JAXA Space Tracking & Communications Center in Japan, 1 in MPEC 2019-B100 -- 2019 BW1
W85LCO Cerro Tololo A in Chile, 2 in MPECs 2019-B115 & 2019-B117 -- 2019 BT2, 2013 CW32
W87LCO Cerro Tololo C in Chile, 1 in MPEC 2019-B115 -- 2013 CW32
K91LCO Sutherland A in South Africa, 1 in MPEC 2019-B115 -- 2013 CW32
H01Magdalena Ridge Obs. (MRO) in New Mexico, 6 in MPECs 2019-B100, 2019-B102, 2019-B103, 2019-B104, 2019-B112 & 2019-B119 -- 2019 BW1, 2019 BV2, 2019 BJ2, 2019 BH2, 2019 BG2, 2019 BF2
568^R. Wainscoat on Mauna Kea in Hawaii, 1 in MPEC 2019-B101 -- 2019 AZ14
G96Mt. Lemmon Survey (MLS) in Arizona, 16 in MPECs 2019-B100, 2019-B102, 2019-B103, 2019-B104, 2019-B105, 2019-B106, 2019-B107, 2019-B108, 2019-B109, 2019-B110, 2019-B111, 2019-B113, 2019-B114, 2019-B115 & 2019-B119 -- 2019 BZ, 2019 BW1, 2019 BV2, 2019 BS2, 2019 BR2, 2019 BQ2, 2019 BP2, 2019 BO2, 2019 BN2, 2019 BM2, 2019 BL2, 2019 BK2, 2019 BJ2, 2019 BJ1, 2019 BH2, 2019 BG2
Z80Northolt Branch Obs. in England, 2 in MPEC 2019-B115 -- 2019 BG1, 2019 AA10
I41Palomar Transient Factory (PTF) in southern California, 11 in MPECs 2019-B102, 2019-B113, 2019-B115 & 2019-B118 -- 2019 BU2, 2019 BK2, 2019 BG2, 2019 BD1, 2019 AP11, 2018 YA3, 2016 AZ8, 2013 VD13, 2012 BC124, 418900, 137924
F51Pan-STARRS 1 (PS1) in Hawaii, 17 in MPECs 2019-B101, 2019-B103, 2019-B104, 2019-B112, 2019-B115, 2019-B116 & 2019-B117 -- 2019 BT2, 2019 BN1, 2019 BK, 2019 BJ2, 2019 BH2, 2019 BF2, 2019 AZ14, 2019 AM6, 2019 AH11, 2019 AF3, 2018 VZ9, 2011 AL1, 512245, 509505, 18736, 111253, 3200
F52Pan-STARRS 2 (PS2) in Hawaii, 13 in MPECs 2019-B102, 2019-B105, 2019-B106, 2019-B108, 2019-B110, 2019-B115 & 2019-B116 -- 2019 BR2, 2019 BP2, 2019 BN2, 2019 BL2, 2019 BG2, 2019 BG1, 2019 BE1, 2019 AW4, 2019 AV4, 2019 AR13, 2018 YJ2, 2018 YD3, 2011 AL1
B04Saint-Barthelemy Obs. in Italy, 2 in MPECs 2019-B107 & 2019-B109 -- 2019 BQ2, 2019 BO2
104San Marcello Pistoiese Obs. in Italy, 5 in MPECs 2019-B100, 2019-B107, 2019-B109, 2019-B110 & 2019-B111 -- 2019 BW1, 2019 BS2, 2019 BR2, 2019 BQ2, 2019 BO2
H36Sandlot Obs. in Kansas, 1 in MPEC 2019-B119 -- 2019 BV2
587Sormano Obs. in Italy, 1 in MPEC 2019-B100 -- 2019 BW1
691Spacewatch 0.9m telescope in Arizona, 6 in MPEC 2019-B115 -- 2019 AW4, 2019 AN13, 2018 XG5, 2015 YE21, 523824, 523633
291Spacewatch 1.8m telescope in Arizona, 20 in MPECs 2019-B104, 2019-B112 & 2019-B115 -- 2019 BJ2, 2019 BF2, 2019 AY, 2019 AR13, 2019 AQ5, 2019 AP8, 2019 AP11, 2019 AM, 2019 AK13, 2019 AG13, 2018 YJ2, 2018 XV5, 2018 XH, 2018 XG5, 2018 VS9, 2017 BP5, 2015 XA352, 2012 TP139, 2012 DJ61, 2002 KJ4
W34Squirrel Valley Obs. in North Carolina, 1 in MPEC 2019-B100 -- 2019 BW1
I52Steward Obs. Mt. Lemmon Station in Arizona, 39 in MPECs 2019-B100, 2019-B102, 2019-B103, 2019-B104, 2019-B105, 2019-B106, 2019-B107, 2019-B108, 2019-B109, 2019-B110, 2019-B111, 2019-B112, 2019-B113, 2019-B114, 2019-B115 & 2019-B119 -- 2019 BW1, 2019 BV2, 2019 BS2, 2019 BR2, 2019 BQ2, 2019 BP2, 2019 BO2, 2019 BN2, 2019 BM2, 2019 BL2, 2019 BK2, 2019 BK, 2019 BJ2, 2019 BH2, 2019 BG2, 2019 BF2, 2019 AW4, 2019 AV6, 2019 AT9, 2019 AT7, 2019 AT3, 2019 AS4, 2019 AR2, 2019 AR11, 2019 AQ4, 2019 AQ11, 2019 AO3, 2019 AO11, 2019 AN2, 2019 AM10, 2019 AJ8, 2019 AB9, 2018 YW, 2018 YE2, 2018 YA3, 2018 XG5, 2018 VN3, 2018 VA10, 2018 TX4
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPEC 2019-B115 -- 2018 XY3, 2018 XB4
L01Visnjan Obs., 11 in MPECs 2019-B100, 2019-B102, 2019-B103, 2019-B104, 2019-B107, 2019-B108, 2019-B109, 2019-B110, 2019-B111, 2019-B113 & 2019-B119 -- 2019 BW1, 2019 BV2, 2019 BS2, 2019 BR2, 2019 BQ2, 2019 BP2, 2019 BO2, 2019 BK2, 2019 BJ2, 2019 BH2, 2019 BG2
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 27 January '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 BU1NEODyS20002056-206249.33e-07-6.44-6.490NEODyS: "Based on 44 optical observations (of which 1 are rejected as outliers) from 2019-01-25.328 to 2019-01-26.343."
2019 BP1NEODyS20002024-2104172.24e-08-4.49-4.890NEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2019-01-23.577 to 2019-01-26.506."
2019 BZJPL Sentry20002077-2118241.88530956e-05-6.16-6.330JPL: Computed at 08:36 today Pacific time based on 23 observations spanning 2.0670 days (2019-Jan-24.180448 to 2019-Jan-26.24741). Diameter approximately 0.011 km. from weighted mean H=27.53.
2019 AF14NEODyS20002028-2116201.94e-09-6.94-7.310NEODyS: "Based on 6 optical observations (of which 0 are rejected as outliers) from 2019-01-09.483 to 2019-01-10.374."
2019 ABNEODyS20002073-2115123.53e-06-6.36-6.720NEODyS: "Based on 38 optical observations (of which 0 are rejected as outliers) from 2019-01-01.272 to 2019-01-03.756."
2018 XB4JPL Sentry20002071-2118180.00016127559-3.62-3.650JPL: Computed at 08:14 today Pacific time based on 63 observations spanning 41.783 days (2018-Dec-13.34358 to 2019-Jan-24.12672). Diameter approximately 0.054 km. from weighted mean H=24.00.
NEODyS20002071-2118541.35e-04-3.70-3.72-NEODyS: "Based on 62 optical observations (of which 0 are rejected as outliers) from 2018-12-13.344 to 2019-01-24.128."
2015 HV182NEODyS20002026-2106131.37e-07-4.38-4.840NEODyS: "Based on 17 optical observations (of which 0 are rejected as outliers) from 2015-04-15.199 to 2015-04-21.280."
2015 EGNEODyS2000R 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 27 January '19

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

2305Generated Traffic Report
2300Grabbed MPEC 2019-B116 - 2011 AL1 - see above
Grabbed MPEC 2019-B117 - 2019 BT2 - see above
Grabbed MPEC 2019-B118 - 2019 BU2 - see above
Grabbed MPEC 2019-B119 - 2019 BV2 - see above
2000Noted that NEODyS has removed 2015 EG as an impact risk - see above
Noted that NEODyS has updated its 2015 HV182 risk assessment - see above
Noted that JPL Sentry has updated its 2018 XB4 risk assessment - see above
Noted that NEODyS has updated its 2018 XB4 risk assessment - see above
Noted that NEODyS has updated its 2019 AB risk assessment - see above
Noted that NEODyS has posted 2019 AF14 as an impact risk - see above
Noted that NEODyS has posted 2019 BP1 as an impact risk - see above
Noted that NEODyS has posted 2019 BU1 as an impact risk - see above
Noted that JPL Sentry has updated its 2019 BZ risk assessment - see above
Grabbed MPEC 2019-B101 - 2019 AZ14 - see above
Grabbed MPEC 2019-B102 - 2019 BG2 - see above
Grabbed MPEC 2019-B103 - 2019 BH2 - see above
Grabbed MPEC 2019-B104 - 2019 BJ2 - see above
Grabbed MPEC 2019-B105 - 2019 BL2 - see above
Grabbed MPEC 2019-B106 - 2019 BN2 - see above
Grabbed MPEC 2019-B107 - 2019 BO2 - see above
Grabbed MPEC 2019-B108 - 2019 BP2 - see above
Grabbed MPEC 2019-B109 - 2019 BQ2 - see above
Grabbed MPEC 2019-B110 - 2019 BR2 - see above
Grabbed MPEC 2019-B111 - 2019 BS2 - see above
Grabbed MPEC 2019-B112 - 2019 BF2 - see above
Grabbed MPEC 2019-B113 - 2019 BK2 - see above
Grabbed MPEC 2019-B114 - 2019 BM2 - see above
Grabbed MPEC 2019-B115 - Daily Orbit Update - see above
0058Grabbed MPEC 2019-B100 - 2019 BW1 - see above