Contents on 13 February '20
- IAU Minor Planet Center
- NEOCP Activity -- 16 listings
- New MPECs -- one MPEC
- Observers -- twelve observers
- Impact Risk Monitoring -- seven objects
- Chronology
Asteroid/Comet Connection (A/CC) Resources:
- Consolidated Risk Tables - the CRT page
Of 1101 risk-listed objects, 60 have had news in the last 31 days. Updated at 1616 UTC on 13 Feb.
- Earth's Busy Neighborhood traffic page
- Ephemerides for risk-listed objects & close passers
- News archive (old) & news image catalog (discontinued)
- Object Links - mainly for radar targets & close passers (mostly discontinued)
- Observing Campaigns (old)
The latest A/CC news is available via framed access, 
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 13 February '20
The MPC's NEO Confirmation Page has 16 listings
When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had sixteen objects listed. Of these, six were "one nighters." So far The Tracking News has counted a total of eighteen 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 13 February '20
Minor Planet Electronic Circulars
As of last check at 2358 UTC, there has been one MPEC posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
<< DOU on 13 February '20 >> MPEC 2020-C133 - "12:05 UT" - Daily Orbit Update
- Observations of risk-listed objects
- K20C01X 2020 CX1 (small asteroid, arc=8 days, H=24.1 ~51m, NHATS target) from Dettelbach Vineyard Obs. (Feb. 12.79-80p7) and the Spacewatch 1.8m telescope (Feb. 13.23-24p3)
- K20C01E 2020 CE1 (small asteroid, arc=11 days, H=25.8 ~23m) from Spacewatch via Kitt Peak Natl. Obs. (KPNO) (Feb. 13.26-27p3 at R=21.7-22.5)
- K20B14J 2020 BJ14 (small asteroid, Q=4.783 AU, arc=14 days, H=24.2 ~49m, close passer) from Spacewatch 1.8m (Feb. 13.38-39p3)
- K20B11Y 2020 BY11 (small asteroid, arc=7 days, H=28.0 ~9m, close passer) from UH/Tholen NEO Follow-Up 2.24m Telescope (Jan. 31.52-53p2 at G=23.16-25 & Feb. 1.46p1 at G=23.38)
- K20B07H 2020 BH7 (small asteroid, Q=4.304 AU, arc=7 days, H=27.8 ~9m) from Tholen 2.24m (Jan. 31.56p2 at G=22.80-23.03)
- K20A01Y 2020 AY1 (small asteroid, arc=39 days, H=25.2 ~31m, close passer, NHATS target) from Spacewatch/KPNO (Feb. 13.29-32p3 at R=22.5-24.5)
- Observations of recently (no longer) risk-listed objects
- K20B14W 2020 BW14 (Q=4.452 AU, arc=2 opp, H=18.0 ~851m) from Dettelbach Vineyard Obs. (Feb. 12.77p3)
- K20B12Q 2020 BQ12 (small asteroid, arc=16 days, H=24.5 ~43m, NHATS target) from Spacewatch/KPNO (Feb. 13.15-16p2 at R=22.2-5)
- K20B04J 2020 BJ4 (almost small, Q=4.729 AU, arc=25 days, H=21.8 ~148m) from Spacewatch 1.8m (Feb. 13.34-36p3)
- Observations of close-passing objects
- K20C00C 2020 CC (arc=4 days, H=28.0 ~9m) from Northolt Branch Obs. (Feb. 5.01-03p4 & 5.08-09p2)
- K20B00D 2020 BD (arc=26 days, H=26.3 ~19m) from Spacewatch/KPNO (Feb. 13.36-41p3 at R=23.0-7)
- Observation campaigns (NHATS targets, radar support)
- K20B11S 2020 BS11 (arc=18 days, H=22.6 ~102m, NHATS) from Spacewatch 1.8m (Feb. 13.43-44p3)
- K20B06J 2020 BJ6 (arc=25 days, H=25.9 ~22m, NHATS) from Spacewatch 1.8m (Feb. 13.29-30p3)
- K20B05F 2020 BF5 (arc=23 days, H=25.0 ~34m, NHATS) from Spacewatch 1.8m (Feb. 13.40-41p3)
-- NHATS target table - Observations of small (H>22.0) & smallish (21.7<H<=22.0) asteroids
- K20B10X 2020 BX10 (arc=18 days, H=22.6 ~102m) from Dettelbach Vineyard Obs. (Feb. 12.82-83p3)
- K20B10R 2020 BR10 (arc=27 days, H=22.7 ~98m) from Dettelbach Vineyard Obs. (Feb. 12.84-85p3) and LCO Cerro Tololo C (Feb. 13.19-20p5)
- K20B02C 2020 BC2 (arc=13 days, H=22.1 ~129m) from Tholen 2.24m (Jan. 31.67p2)
- K20B01Q 2020 BQ1 (arc=26 days, H=22.9 ~89m) from Spacewatch/KPNO (Feb. 13.34-35p3)
- K20B00T 2020 BT (arc=26 days, H=24.3 ~47m) from Spacewatch 1.8m (Feb. 13.30-31p2)
- K19Y05P 2019 YP5 (arc=45 days, H=22.4 ~112m) from Spacewatch 1.8m (Feb. 13.15-21p6)
- K15Bo9K 2015 BK509 (arc=2 opp, H=22.4 ~112m) from SATINO-1 (Feb. 12.06-07p2) and Farra d'Isonzo Obs. (Feb. 12.90-91p3)
- K06B09A 2006 BA9 (arc=3 opp, H=22.7 ~98m) from Spacewatch 1.8m (Feb. 13.25-26p3)
- K20B11Z 2020 BZ11 (arc=24 days, H=22.0 ~135m) from Northolt Branch Obs. (Feb. 12.04-07p2)
- K19X01N 2019 XN1 (arc=4 opp, H=22.0 ~135m) from the Zwicky Transient Facility (ZTF) (Feb. 12.21-23p2 & 12.28-29p2)
- Observations of other objects
- K20B14P 2020 BP14 from Dettelbach Vineyard Obs. (Feb. 12.74-75p3)
- K19X01G 2019 XG1 (Q=4.163 AU, arc=2 opp, H=19.1 ~513m) from ZTF (Feb. 12.22-23p2 & 12.30p2)
- K19W03F 2019 WF3 (arc=80 days, H=20.9 ~224m) from Spacewatch 1.8m (Feb. 13.21-23p3)
- K18X05V 2018 XV5 (Q=4.228 AU, arc=5 opp, H=17.7 ~977m) from Pan-STARRS 1 (PS1) (2013 Feb. 14.40-45p3 at G=22.1-23.4, 2015 Jan. 17.25-29p3 at G=21.9-22.3, 2015 Jan. 19.38-42p4 at G=22.5-23.0, 2018 Dec. 14.41-44p3 at G=20.7-8 & Jan. 1.58-59p2 at G=23.4-24.0)
- K11C04T 2011 CT4 (arc=3 opp, H=20.5 ~269m) from ZTF (Feb. 12.17p1 & 12.25-28p3)
- K08E05E 2008 EE5 (i=44.8°, arc=4 opp, H=19.7 ~389m) from Northolt Branch Obs. (Feb. 12.03p2)
- K03O03C 2003 OC3 (arc=5 opp, H=18.7 ~616m) from PS1 (2010 Aug. 5.52p1 at G=21.4, 2010 Sept. 2.43-44p2 at G=21.6-22.0, 2012 Nov. 8.56p1 at G=22.4, 2012 Dec. 31.25-26p2 at G=22.2-3, 2012 Dec. 31.35p1 at G=22.3, 2013 Jan. 16.29-31p4 at G=21.7-22.4 & 2017 Aug. 17.47-50p3 at G=21.5-7) and ATLAS Mauna Loa (Feb. 12.42-43p4)
- l4223 474223 2001 CC32 from ATLAS Mauna Loa (Feb. 12.58-60p4)
- k2736 462736 2010 BL2 from ZTF (Feb. 12.12-17p4)
- j9386 459386 2012 KJ11 from ZTF (Feb. 12.22-23p2 & 12.30p2)
- f6591 416591 2004 LC2 from ZTF (Feb. 12.20p2 & 12.30p2)
- X1792 331792 2003 MT2 from ZTF (Feb. 11.16-17p2, 12.14p1 & 12.26p1)
- N2368 232368 2003 AZ2 from ZTF (Feb. 12.20p2 & 12.27-28p3)
- G3373 163373 2002 PZ39 from Northolt Branch Obs. (Feb. 11.98-99p3)
- F9454 159454 2000 DJ8 from ZTF (Feb. 12.24-27p4)
- D7925 137925 2000 BJ19 from ZTF (Feb. 11.15p2 & 11.25p2)
- D6993 136993 1998 ST49 from ZTF (Feb. 12.39-43p3 & 12.48-51p2)
- A6589 106589 2000 WN107 from ZTF (Feb. 12.11-17p4)
- 34613 34613 2000 UR13 from ZTF (Feb. 11.16-19p4, 12.17p1 & 12.25-28p3)
- 18882 18882 1999 YN4 from WISE (Feb. 10.59p1, 10.99p1, 11.12p1, 11.64p2 & 11.77p1)
- 12923 12923 Zephyr (1999 GK4) from ZTF (Feb. 12.14-19p3 & 12.27p1)
Observers on 13 February '20
Twelve observers appear in today's MPEC.
| Code | Observer / observatory |
|---|---|
| T08 | ATLAS Mauna Loa in Hawaii, 2 in MPEC 2020-C133 -- 2003 OC3, 474223 |
| K87 | Dettelbach Vineyard Obs. in Germany, 5 in MPEC 2020-C133 -- 2020 CX1, 2020 BX10, 2020 BW14, 2020 BR10, 2020 BP14 |
| 595 | Farra d'Isonzo Obs. in Italy, 1 in MPEC 2020-C133 -- 2015 BK509 |
| 695^ | Spacewatch via Kitt Peak Natl. Obs. (KPNO) in Arizona, 5 in MPEC 2020-C133 -- 2020 CE1, 2020 BQ12, 2020 BQ1, 2020 BD, 2020 AY1 |
| W87 | LCO Cerro Tololo C in Chile, 1 in MPEC 2020-C133 -- 2020 BR10 |
| Z80 | Northolt Branch Obs. in England, 4 in MPEC 2020-C133 -- 2020 CC, 2020 BZ11, 2008 EE5, 163373 |
| F51 | Pan-STARRS 1 (PS1) in Hawaii, 2 in MPEC 2020-C133 -- 2018 XV5, 2003 OC3 |
| C95 | SATINO-1 in France, 1 in MPEC 2020-C133 -- 2015 BK509 |
| 291 | Spacewatch 1.8m telescope in Arizona, 10 in MPEC 2020-C133 -- 2020 CX1, 2020 BT, 2020 BS11, 2020 BJ6, 2020 BJ4, 2020 BJ14, 2020 BF5, 2019 YP5, 2019 WF3, 2006 BA9 |
| T12 | UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 3 in MPEC 2020-C133 -- 2020 BY11, 2020 BH7, 2020 BC2 |
| C51 | WISE in Earth polar orbit, 1 in MPEC 2020-C133 -- 18882 |
| I41 | Zwicky Transient Facility (ZTF) in southern California, 14 in MPEC 2020-C133 -- 2019 XN1, 2019 XG1, 2011 CT4, 462736, 459386, 416591, 34613, 331792, 232368, 159454, 137925, 136993, 12923, 106589 |
| For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page. | |
Impact Risk Monitoring on 13 February '20
| 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 CX1 | JPL Sentry | 1615 | 2104-2104 | 1 | 1.545e-09 | -8.71 | -8.71 | 0 | JPL: Computed at 06:22 today Pacific time based on 36 observations spanning 7.8233 days (2020-Feb-05.41525 to 2020-Feb-13.23856). Diameter approximately 0.051 km. from weighted mean H=24.09. |
| 2020 CE1 | JPL Sentry | 1615 | 2095-2095 | 2 | 5.303e-06 | -5.72 | -5.99 | 0 | JPL: Computed at 05:58 today Pacific time based on 23 observations spanning 11.119 days (2020-Feb-02.15265 to 2020-Feb-13.27117). Diameter approximately 0.024 km. from weighted mean H=25.73. |
| NEODyS | 1615 | 2095 | 2 | 6.72e-06 | -5.63 | -5.93 | 0 | NEODyS: "Based on 23 optical observations (of which 0 are rejected as outliers) from 2020-02-02.153 to 2020-02-13.272." | |
| 2020 BJ14 | JPL Sentry | 1615 | 2082-2087 | 2 | 2.02087e-05 | -4.43 | -4.43 | 0 | JPL: Computed at 05:58 today Pacific time based on 64 observations spanning 13.986 days (2020-Jan-30.399864 to 2020-Feb-13.38556). Diameter approximately 0.049 km. from weighted mean H=24.18. |
| 2020 BY11 | JPL Sentry | 1615 | 2114-2120 | 3 | 1.56e-07 | -8.48 | -8.92 | 0 | JPL: Computed at 06:00 today Pacific time based on 29 observations spanning 6.9154 days (2020-Jan-26.41131 to 2020-Feb-02.32674). Diameter approximately 0.009 km. from weighted mean H=27.93. |
| NEODyS | 1615 | 2114-2118 | 5 | 7.68e-08 | -8.81 | -9.05 | 0 | NEODyS: "Based on 29 optical observations (of which 0 are rejected as outliers) from 2020-01-26.412 to 2020-02-02.328." | |
| 2020 BH7 | JPL Sentry | 1615 | R E M O V E D | JPL: Risk listing removed at 1358 UTC today | |||||
| 2020 AY1 | JPL Sentry | 1615 | 2103-2103 | 1 | 1.636e-07 | -7.28 | -7.28 | 0 | JPL: Computed at 06:07 today Pacific time based on 124 observations spanning 39.082 days (2020-Jan-05.24158 to 2020-Feb-13.32325). Diameter approximately 0.031 km. from weighted mean H=25.22. |
| NEODyS | 1615 | 2103 | 1 | 3.64e-08 | -7.95 | -7.95 | 0 | NEODyS: "Based on 125 optical observations (of which 4 are rejected as outliers) from 2020-01-05.242 to 2020-02-13.324." | |
| 2017 AA21 | JPL Sentry | 1615 | 2024-2117 | 194 | 2.3962655e-06 | -6.01 | -6.92 | 0 | JPL: Computed at 11:52 April 6th of 2017 Pacific time based on 7 observations spanning .98032 days (2017-Jan-03.45994 to 2017-Jan-04.44026). Diameter approximately 0.021 km. from weighted mean H=26.04. |
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 13 February '20
Times are UTC for when items were noted or added by The Tracking News.
| 1615 | Noted that JPL Sentry has updated its 2017 AA21 risk assessment - see above Noted that JPL Sentry has updated its 2020 AY1 risk assessment - see above Noted that NEODyS has updated its 2020 AY1 risk assessment - see above Noted that JPL Sentry has removed 2020 BH7 as an impact risk - see above Noted that JPL Sentry has updated its 2020 BJ14 risk assessment - see above Noted that JPL Sentry has updated its 2020 BY11 risk assessment - see above Noted that NEODyS has updated its 2020 BY11 risk assessment - see above Noted that JPL Sentry has updated its 2020 CE1 risk assessment - see above Noted that NEODyS has updated its 2020 CE1 risk assessment - see above Noted that JPL Sentry has updated its 2020 CX1 risk assessment - see above Grabbed MPEC 2020-C133 - Daily Orbit Update - see above |
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