Contents  on 29 February '20

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.

NEOCP Activity  on 29 February '20

The MPC's NEO Confirmation Page has 25 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 25 objects listed. Of these, eighteen were "one nighters." So far The Tracking News has counted a total of 42 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 February '20

Minor Planet Electronic Circulars

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


MPEC 2020-D149 - "19:12 UT" - 2020 DR4


MPEC 2020-D148 - "19:06 UT" - 2020 DQ4


MPEC 2020-D147 - "19:04 UT" - 2020 DP4


MPEC 2020-D146 - "19:03 UT" - 2020 DO4


MPEC 2020-D145 - "19:02 UT" - 2020 DN4


MPEC 2020-D144 - "19:00 UT" - 2020 CE3


MPEC 2020-D143 - "18:57 UT" - 2020 DM4


MPEC 2020-D142 - "15:00 UT" - 2019 GD20


MPEC 2020-D141 - "14:58 UT" - 2020 DL4


MPEC 2020-D140 - "14:51 UT" - 2020 DK4


MPEC 2020-D139 - "14:49 UT" - 2020 DJ4


MPEC 2020-D138 - "14:42 UT" - 2020 DH4


<< DOU on 29 February '20 >>  MPEC 2020-D137 - "12:00 UT" - Daily Orbit Update


MPEC 2020-D136 - "01:36 UT" - 2020 DG4


MPEC 2020-D135 - "01:27 UT" - 2020 DF4

Observers  on 29 February '20

A total of 40 observers appear in today's MPECs.

CodeObserver / observatory
119Abastumani Obs. in Georgia, 1 in MPEC 2020-D143 -- 2020 DM4
H21Astronomical Research Obs. Westfield in Illinois, 20 in MPECs 2020-D136, 2020-D137, 2020-D138, 2020-D139, 2020-D140, 2020-D141, 2020-D145, 2020-D146 & 2020-D148 -- 2020 DQ4, 2020 DO4, 2020 DN4, 2020 DL4, 2020 DL2, 2020 DK4, 2020 DJ4, 2020 DH4, 2020 DG4, 2020 CV2, 2020 CE, 2020 BN15, 2020 BC5, 2020 BB1, 2016 HD19, 2016 EE157, 2015 MO66, 2003 MS2, 2000 EU70, 331509
T08ATLAS Mauna Loa in Hawaii, 8 in MPEC 2020-D137 -- 2020 BO5, 2019 UO, 2016 LE9, 2006 PY17, 86667, 494880, 115052, 4954
V00Bok Telescope in Arizona, 1 in MPEC 2020-D135 -- 2020 DF4
Z84Calar Alto Schmidt in Spain, 1 in MPEC 2020-D142 -- 2019 GD20
160Castelmartini Obs. in Italy, 5 in MPEC 2020-D137 -- 2020 BZ12, 2015 BK509, 2003 OC3, 30825, 11405
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 11 in MPECs 2020-D135, 2020-D136, 2020-D139, 2020-D140, 2020-D141, 2020-D143, 2020-D145, 2020-D146, 2020-D147, 2020-D148 & 2020-D149 -- 2020 DR4, 2020 DQ4, 2020 DP4, 2020 DO4, 2020 DN4, 2020 DM4, 2020 DL4, 2020 DK4, 2020 DJ4, 2020 DG4, 2020 DF4
106Crni Vrh Obs. in Slovenia, 2 in MPEC 2020-D137 -- 2020 DZ3, 2020 DY3
W84#program code "#" (12) via DECam in Chile, 1 in MPEC 2020-D137 -- 2020 CQ1
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 15 in MPECs 2020-D135, 2020-D136, 2020-D137, 2020-D138, 2020-D139, 2020-D140, 2020-D141, 2020-D142, 2020-D143, 2020-D145, 2020-D146, 2020-D147, 2020-D148 & 2020-D149 -- 2020 DZ3, 2020 DR4, 2020 DR2, 2020 DQ4, 2020 DP4, 2020 DO4, 2020 DN4, 2020 DM4, 2020 DL4, 2020 DK4, 2020 DJ4, 2020 DH4, 2020 DG4, 2020 DF4, 2019 GD20
734Farpoint Obs. in Kansas, 12 in MPECs 2020-D137, 2020-D138, 2020-D140, 2020-D145, 2020-D147 & 2020-D148 -- 2020 DX, 2020 DQ4, 2020 DP4, 2020 DN4, 2020 DK4, 2020 DH4, 2020 BJ11, 2020 BE2, 2019 YR4, 2019 UO, 2017 BP31, 2016 WE1
595Farra d'Isonzo Obs. in Italy, 2 in MPECs 2020-D137 & 2020-D143 -- 2020 DY3, 2020 DM4
E89Geyserland Obs. in New Zealand, 7 in MPEC 2020-D137 -- 90075, 65690, 54686, 40267, 8566, 7088, 5626
203GiaGa Obs. in Italy, 1 in MPEC 2020-D143 -- 2020 DM4
J95Great Shefford Obs. in England, 1 in MPEC 2020-D137 -- 2020 DW
1861program code 1 via Kitab Obs., 3 in MPEC 2020-D137 -- 2020 BZ12, 2017 BM123, 2015 BK509
711McDonald Obs. in Texas, 2 in MPECs 2020-D136 & 2020-D139 -- 2020 DJ4, 2020 DG4
V14Moose Springs Obs., 1 in MPEC 2020-D137 -- 276397
O49MPC code O49, 1 in MPEC 2020-D143 -- 2020 DM4
G96Mt. Lemmon Survey (MLS) in Arizona, 12 in MPECs 2020-D135, 2020-D136, 2020-D138, 2020-D139, 2020-D140, 2020-D141, 2020-D144, 2020-D145, 2020-D146, 2020-D147, 2020-D148 & 2020-D149 -- 2020 DR4, 2020 DQ4, 2020 DP4, 2020 DO4, 2020 DN4, 2020 DL4, 2020 DK4, 2020 DJ4, 2020 DH4, 2020 DG4, 2020 DF4, 2020 CE3
644NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2020-D137 -- 2003 BN1
C23Olmen Obs. in Belgium, 1 in MPEC 2020-D137 -- 52768
F51Pan-STARRS 1 in Hawaii, 1 in MPEC 2020-D137 -- 325102
K63Pascoli Obs. in Italy, 3 in MPECs 2020-D135, 2020-D137 & 2020-D146 -- 2020 DO4, 2020 DF4, 353947
A53Peschiera del Garda Obs. in Italy, 3 in MPEC 2020-D137 -- 2020 BP14, 2019 XG1, 2019 WB6
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 9 in MPEC 2020-D137 -- 2020 DP2, 2020 DC3, 2020 CL2, 2019 XG1, 2019 WB6, 2019 SH6, 2017 BM123, 2000 BO28, 35107
654Pomona College Table Mtn. Obs. in southern California, 1 in MPEC 2020-D137 -- 2020 BF11
A48Povegliano Veronese Obs. in Italy, 1 in MPEC 2020-D137 -- 2020 DX
D29Purple Mtn. Obs. Xuyi Station in China, 1 in MPEC 2020-D143 -- 2020 DM4
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2020-D135 -- 2020 DF4
H36Sandlot Obs. in Kansas, 4 in MPECs 2020-D138, 2020-D143, 2020-D145 & 2020-D147 -- 2020 DP4, 2020 DN4, 2020 DM4, 2020 DH4
C95SATINO-1 in France, 2 in MPECs 2020-D137 & 2020-D143 -- 2020 DM4, 2015 FP332
691Spacewatch 0.9m telescope in Arizona, 3 in MPEC 2020-D137 -- 2020 DF3, 2017 BP31, 2009 CE
291Spacewatch 1.8m telescope in Arizona, 3 in MPEC 2020-D137 -- 2020 DF2, 2020 CF2, 2020 BS12
W34Squirrel Valley Obs. in North Carolina, 1 in MPEC 2020-D137 -- 2020 DV3
I52Steward Obs. Mt. Lemmon Station in Arizona, 26 in MPECs 2020-D135, 2020-D136, 2020-D137, 2020-D139, 2020-D140, 2020-D141, 2020-D143, 2020-D144, 2020-D145, 2020-D146, 2020-D148 & 2020-D149 -- 2020 DY, 2020 DW3, 2020 DS3, 2020 DS2, 2020 DR4, 2020 DQ4, 2020 DQ3, 2020 DQ, 2020 DP2, 2020 DO4, 2020 DN4, 2020 DN3, 2020 DM4, 2020 DM2, 2020 DL4, 2020 DK4, 2020 DJ4, 2020 DJ3, 2020 DG4, 2020 DG3, 2020 DF4, 2020 DF3, 2020 DE3, 2020 DD3, 2020 DA2, 2020 CE3
858Tebbutt Obs. in New Mexico, 2 in MPECs 2020-D137 & 2020-D143 -- 2020 DT3, 2020 DM4
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 4 in MPEC 2020-D137 -- 2020 DW, 2020 DO2, 2020 CJ1, 2020 BH
L01Visnjan Obs. in Croatia, 7 in MPECs 2020-D135, 2020-D137, 2020-D138, 2020-D140, 2020-D141, 2020-D143 & 2020-D146 -- 2020 DY3, 2020 DO4, 2020 DM4, 2020 DL4, 2020 DK4, 2020 DH4, 2020 DF4
C51WISE in Earth polar orbit, 4 in MPEC 2020-D137 -- 2019 YS4, 458732, 159929, 11885
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 29 February '20

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
2020 DR4JPL Sentry21002039-206441.21656e-07-9.08-9.390JPL: Computed at 12:39 today Pacific time based on 13 observations spanning 1.9104 days (2020-Feb-27.12578 to 2020-Feb-29.03616). Diameter approximately 0.004 km. from weighted mean H=29.71.
2020 DP4JPL Sentry21002074-2117312.8177716e-06-5.91-6.000JPL: Computed at 12:38 today Pacific time based on 25 observations spanning 2.0474 days (2020-Feb-27.3785 to 2020-Feb-29.42591). Diameter approximately 0.032 km. from weighted mean H=25.15.
2020 DG4NEODyS21002085-2117184.85e-06-7.25-7.820NEODyS: "Based on 30 optical observations (of which 1 are rejected as outliers) from 2020-02-27.295 to 2020-02-28.997."
JPL Sentry05302047-2120181.3029646e-05-6.82-7.360JPL: Computed at 19:08 Feb. 28th Pacific time based on 29 observations spanning 1.7017 days (2020-Feb-27.29404 to 2020-Feb-28.995738). Diameter approximately 0.007 km. from weighted mean H=28.28.
2020 DN3NEODyS21002104-211782.56e-07-7.65-8.080NEODyS: "Based on 61 optical observations (of which 0 are rejected as outliers) from 2020-02-26.217 to 2020-02-29.242."
JPL Sentry17002107-211978.94365e-07-7.10-7.630JPL: Computed at 05:53 today Pacific time based on 61 observations spanning 3.0257 days (2020-Feb-26.21575 to 2020-Feb-29.24145). Diameter approximately 0.015 km. from weighted mean H=26.76.
2020 DF3NEODyS21002066-2115161.18e-06-5.24-5.870NEODyS: "Based on 57 optical observations (of which 1 are rejected as outliers) from 2020-02-24.445 to 2020-02-29.474."
JPL Sentry17002053-2103122.866517e-06-4.88-5.320JPL: Computed at 05:52 today Pacific time based on 57 observations spanning 5.0290 days (2020-Feb-24.44469 to 2020-Feb-29.47365). Diameter approximately 0.050 km. from weighted mean H=24.14.
2020 DR2JPL Sentry22332074-211432.244339e-05-1.48-1.751JPL: Computed at 13:59 today Pacific time based on 158 observations spanning 8.6564 days (2020-Feb-20.19345 to 2020-Feb-28.849896). Diameter approximately 0.590 km. from weighted mean H=18.80.
NEODyS21002062-211441.35e-05-1.71-1.951NEODyS: "Based on 165 optical observations (of which 2 are rejected as outliers) from 2020-02-20.194 to 2020-02-28.851."
2020 DO2JPL Sentry17002071-2113106.875158e-06-5.97-6.370JPL: Computed at 05:32 today Pacific time based on 13 observations spanning 5.2471 days (2020-Feb-20.30254 to 2020-Feb-25.549598). Diameter approximately 0.015 km. from weighted mean H=26.82.
2020 DF2NEODyS2100R E M O V E D-
2020 DWNEODyS2100210813.4e-08-10.52-10.520NEODyS: "Based on 52 optical observations (of which 4 are rejected as outliers) from 2020-02-16.435 to 2020-02-19.219."
JPL Sentry17002108-210814.743e-06-8.36-8.360JPL: Computed at 06:02 today Pacific time based on 51 observations spanning 2.7839 days (2020-Feb-16.43421 to 2020-Feb-19.21811). Diameter approximately 0.003 km. from weighted mean H=30.34.
2020 CF2NEODyS21002096-2116101.22e-05-6.63-6.80NEODyS: "Based on 84 optical observations (of which 2 are rejected as outliers) from 2020-02-13.349 to 2020-02-29.448."
JPL Sentry17002072-2120107.817662e-06-6.80-7.120JPL: Computed at 05:41 today Pacific time based on 83 observations spanning 16.098 days (2020-Feb-13.349028 to 2020-Feb-29.44685). Diameter approximately 0.011 km. from weighted mean H=27.51.
2020 CQ1NEODyS21002058-2118577.15e-03-4.21-4.930NEODyS: "Based on 44 optical observations (of which 0 are rejected as outliers) from 2020-02-05.356 to 2020-02-27.283."
JPL Sentry17002052-2095140.00139216574-4.89-4.920JPL: Computed at 05:33 today Pacific time based on 44 observations spanning 21.927 days (2020-Feb-05.3547 to 2020-Feb-27.281772). Diameter approximately 0.006 km. from weighted mean H=28.83.
2020 BHNEODyS21002104-2117107.07e-06-7.21-7.390NEODyS: "Based on 61 optical observations (of which 1 are rejected as outliers) from 2020-01-18.333 to 2020-02-25.587."
JPL Sentry17002104-212054.5691e-05-6.37-6.540JPL: Computed at 05:34 today Pacific time based on 60 observations spanning 38.254 days (2020-Jan-18.33189 to 2020-Feb-25.585792). Diameter approximately 0.008 km. from weighted mean H=28.25.

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 February '20

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

2233Noted that JPL Sentry has updated its 2020 DR2 risk assessment - see above
2100Noted that NEODyS has updated its 2020 BH risk assessment - see above
Noted that NEODyS has updated its 2020 CF2 risk assessment - see above
Noted that NEODyS has updated its 2020 CQ1 risk assessment - see above
Noted that NEODyS has removed 2020 DF2 as an impact risk - see above
Noted that NEODyS has updated its 2020 DF3 risk assessment - see above
Noted that NEODyS has posted 2020 DG4 as an impact risk - see above
Noted that NEODyS has updated its 2020 DN3 risk assessment - see above
Noted that JPL Sentry has posted 2020 DP4 as an impact risk - see above
Noted that NEODyS has updated its 2020 DR2 risk assessment - see above
Noted that JPL Sentry has posted 2020 DR4 as an impact risk - see above
Noted that NEODyS has updated its 2020 DW risk assessment - see above
1916Grabbed MPEC 2020-D148 - 2020 DQ4 - see above
Grabbed MPEC 2020-D149 - 2020 DR4 - see above
1905Grabbed MPEC 2020-D143 - 2020 DM4 - see above
Grabbed MPEC 2020-D144 - 2020 CE3 - see above
Grabbed MPEC 2020-D145 - 2020 DN4 - see above
Grabbed MPEC 2020-D146 - 2020 DO4 - see above
Grabbed MPEC 2020-D147 - 2020 DP4 - see above
1700Noted that JPL Sentry has updated its 2020 BH risk assessment - see above
Noted that JPL Sentry has updated its 2020 CF2 risk assessment - see above
Noted that JPL Sentry has updated its 2020 CQ1 risk assessment - see above
Noted that JPL Sentry has updated its 2020 DF3 risk assessment - see above
Noted that JPL Sentry has updated its 2020 DN3 risk assessment - see above
Noted that JPL Sentry has updated its 2020 DO2 risk assessment - see above
Noted that JPL Sentry has updated its 2020 DW risk assessment - see above
Grabbed MPEC 2020-D137 - Daily Orbit Update - see above
Grabbed MPEC 2020-D138 - 2020 DH4 - see above
Grabbed MPEC 2020-D139 - 2020 DJ4 - see above
Grabbed MPEC 2020-D140 - 2020 DK4 - see above
Grabbed MPEC 2020-D141 - 2020 DL4 - see above
Grabbed MPEC 2020-D142 - 2019 GD20 - see above
0530Noted that JPL Sentry has posted 2020 DG4 as an impact risk - see above
0200Grabbed MPEC 2020-D135 - 2020 DF4 - see above
Grabbed MPEC 2020-D136 - 2020 DG4 - see above