Contents on 12 July '19
- Traffic Report -- eight objects
- IAU Minor Planet Center
- Observers -- thirteen observers
- Impact Risk Monitoring -- two objects
NOTE: These A/CC news pages will update less often for an extended period. All discoveries and observing credits will be reported, but we may miss some interim impact risk assessments and undercount NEOCP objects, and there may be some days without a traffic report for Earth's Busy Neighborhood.
Asteroid/Comet Connection (A/CC) Resources:
- Consolidated Risk Tables - the CRT page
Of 1064 risk-listed objects, 50 have had news in the last 31 days. Updated at 1501 UTC on 12 July.
- 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)
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 12 July '19
Eight objects reported inside ten LD
There are eight small Solar-System bodies reported within ten lunar distances (LD) of our planet today. Nearest are intruder 2019 NN3, heading out from 2.72 to 4.62 LD, and risk-listed 2019 NX5, which is calculated with some uncertainty to be moving away from about 2.8 to 3.0 LD*.
|Neighborhood Traffic - sorted by Earth passage distance, grouped by 2.41, 5.0 & 10.0 LD boundaries|
|Earth passage||I D||~Size||Distance today||Inside ten LD||Notes|
|0.82 LD July 9||2019 MB4||21 m||4.35 to 5.91 LD||July 2 - 15||intruder|
|0.83 LD July 10||2019 NN3||37 m||2.72 to 4.62 LD||July 5 - 15||intruder - DOU|
|2.13 LD July 10||2019 NM5||13 m||3.44 to 5.12 LD||July 5 - 15||DOU|
|2.6 LD July 9*||2019 NX5||5 m||2.8 to 3.0 LD||June 13 - Aug. 4||EPU +/- 21 mins.*, NHATS target, risk|
|4.35 LD July 8||2019 MT2||18 m||9.60 to 11.87 LD||July 4 - 12||exits ten LD, risk|
|5.56 LD July 9||2019 NP5||10 m||5.97 to 6.44 LD||July 2 - 17||NHATS target, risk - DOU|
|7.82 LD tomorrow||2019 MW1||43 m||7.83 from 8.13 LD||July 9 - 16|
|8.97 LD July 10||2019 NM4||56 m||9.59 to 10.34 LD||July 7 - 12||exits ten LD|
|6.6 LD July 29*||2019 NN4||26 m||15.0 from 15.7 LD||July 20 - Aug. 6||EPU +/- 13 mins.*, NHATS target|
|* EPU = Earth passage uncertainty|
This report was generated at 1750 UTC with follow-up in today's DOU MPEC for outbound objects 2019 NM5, intruder 2019 NN3, and risk-listed 2019 NP5, and for departed 2019 MQ2.
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 12 July '19
The MPC's NEO Confirmation Page has 22 listings
When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 22 objects listed. Of these, eight were "one nighters." So far The Tracking News has counted a total of 34 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 12 July '19
Minor Planet Electronic Circulars
As of last check at 2358 UTC, there have been five MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- MPEC 2019-N147 time-stamped "01:41 UT" - 2018 XY3 - see below
- MPEC 2019-N148 time-stamped "11:14 UT" - 2019 AG13 - see below
- MPEC 2019-N149 time-stamped "12:03 UT" - Daily Orbit Update - see below
- MPEC 2019-N150 time-stamped "13:11 UT" - 2019 NK6 - see below
- MPEC 2019-N151 time-stamped "20:52 UT" - 2019 NL6
MPEC 2019-N151 - "20:52 UT" - 2019 NL6
- K19N06L 2019 NL6 (small asteroid, H=22.1 ~129m) was picked up at 1032 UT on 10 July by R. Wainscoat on Mauna Kea, observing it at July 10.44p4, 11.43-44p3, and 12.51p3. This detection was confirmed by Magdalena Ridge Obs. (MRO) (July 12.35-38p4).
MPEC 2019-N150 - "13:11 UT" - 2019 NK6
- K19N06K 2019 NK6 (small asteroid, H=22.9 ~89m) was picked up at 1237 UT on 10 July by Pan-STARRS 1 (PS1), observing it at July 10.53-56p3. This detection was confirmed by Pan-STARRS 2 (PS2) (June 10.53-55p2), R. Wainscoat/Mauna Kea (July 11.59p3), Astronomical Research Obs. Westfield (July 12.33-34p2), and MRO (July 12.34-37p4).
- Observations of risk-listed objects
- K19N05P 2019 NP5 (small asteroid, arc=6 days, H=27.6 ~10m, close passer, NHATS target) from R. Wainscoat/Mauna Kea (July 10.45p2) and Great Shefford Obs. (July 12.01-02p3)
- K19N03O 2019 NO3 (i=46.0°, Q=5.924 AU, arc=6 days, H=19.1 ~513m) from program code 3 via Montsec Obs. (July 10.88p2)
- Observations of recently (no longer) risk-listed objects
- K19N03N 2019 NN3 (small asteroid, arc=40 days, H=24.7 ~39m, close passer) from GINOP-KHK (July 9.86p15)
- Observations of close-passing objects
- K19N05M 2019 NM5 (arc=12 days, H=27.1 ~13m) from Great Shefford Obs. (July 12.03-05p3)
- K19M02Q 2019 MQ2 (q=0.259 AU, arc=5 days, H=24.2 ~49m) from Great Shefford Obs. (July 3.99p2)
- Observations of small asteroids (H>22.0)
- K19G00O 2019 GO (arc=93 days, H=23.9 ~56m) from UH/Tholen NEO Follow-Up 2.24m Telescope (July 4.43p1 at G=23.32)
- Observations of other objects
- K19N02X 2019 NX2 (arc=28 days, H=21.1 ~204m) from Great Shefford Obs. (July 12.06-07p3)
- K19N02E 2019 NE2 (arc=41 days, H=21.1 ~204m) from Castelmartini Obs. (July 10.90p4)
- K19M02K 2019 MK2 (arc=12 days, H=20.6 ~257m) from Campo dos Amarais Obs. (July 11.11-12p3)
- K19M02A 2019 MA2 (i=41.0°, Q=4.101 AU, arc=15 days, H=18.8 ~589m) from Great Shefford Obs. (July 11.99p4)
- K19M01V 2019 MV1 from SATINO-1 (July 1.92-94p3) and ARO Westfield (July 3.18p5)
- K19M00A 2019 MA (i=39.5°, arc=36 days, H=19.8 ~371m) from the Zwicky Transient Facility (ZTF) (July 9.23-29p5)
- K19G20F 2019 GF20 (arc=88 days, H=21.6 ~162m) from Tholen 2.24m (July 4.26p1 at G=22.47)
- K18X03Y 2018 XY3 (arc=4 opp, H=19.9 ~355m) from PS1 (2015 Oct. 24.57-58p3 at G=22.3-23.5 & 2016 July 13.56-59p4 at G=22.2-6)
- K15X01C 2015 XC1 (arc=3 opp, H=19.0 ~537m) from ZTF (July 9.25p1)
- K01O00T 2001 OT (arc=4 opp, H=21.6 ~162m) from Tholen 2.24m (July 4.32p3)
- l0951 470951 2009 LS from ZTF (July 11.22-26p4)
- i1825 441825 2009 SK1 from ZTF (July 9.31-33p2, 10.18p1, 10.33p1, 11.26p1, 11.31p1 & 11.35p1)
- e1857 401857 2000 PG3 from ZTF (July 11.44-49p2)
- Z5256 355256 2007 KN4 from ZTF (July 8.18-19p2, 11.24p1 & 11.30p1)
- W6777 326777 2003 SV222 from Castelmartini Obs. (July 10.91p3)
- N1134 231134 2005 TU45 from Castelmartini Obs. (July 10.85p1)
- D7170 137170 1999 HF1 from Castelmartini Obs. (July 10.84p3)
- 68950 68950 2002 QF15 from ZTF (July 11.17-23p3 & 11.30p1)
- 66391 66391 1999 KW4 from Castelmartini Obs. (July 10.85p2)
MPEC 2019-N148 - "11:14 UT" - 2019 AG13
- K19A13G 2019 AG13 (borderline-small, Earth MOID=2.3 LD, H=21.8 ~148m) from Tholen 2.24m (July 3.57-59p2 at G=23.94-24.10 & 4.52-53p2 at G=23.79-90)
MPEC 2019-N147 - "01:41 UT" - 2018 XY3
- K18X03Y 2018 XY3 (H=20.1 ~323m) from Tholen 2.24m (July 3.60p1 at G=22.66 & 4.55-56p2 at G=22.54-58)
Observers on 12 July '19
Thirteen observers appear in today's MPECs.
|Code||Observer / observatory|
|H21||Astronomical Research Obs. Westfield in Illinois, 2 in MPECs 2019-N149 & 2019-N150 -- 2019 NK6, 2019 MV1|
|X74||Campo dos Amarais Obs., 1 in MPEC 2019-N149 -- 2019 MK2|
|160||Castelmartini Obs. in Italy, 5 in MPEC 2019-N149 -- 2019 NE2, 66391, 326777, 231134, 137170|
|K88||GINOP-KHK in Hungary, 1 in MPEC 2019-N149 -- 2019 NN3|
|J95||Great Shefford Obs. in England, 5 in MPEC 2019-N149 -- 2019 NX2, 2019 NP5, 2019 NM5, 2019 MQ2, 2019 MA2|
|H01||Magdalena Ridge Obs. (MRO) in New Mexico, 2 in MPECs 2019-N150 & 2019-N151 -- 2019 NL6, 2019 NK6|
|568^||R. Wainscoat on Mauna Kea in Hawaii, 3 in MPECs 2019-N149, 2019-N150 & 2019-N151 -- 2019 NP5, 2019 NL6, 2019 NK6|
|C653||program code 3 via Montsec Obs. in Spain, 1 in MPEC 2019-N149 -- 2019 NO3|
|F51||Pan-STARRS 1 (PS1) in Hawaii, 2 in MPECs 2019-N149 & 2019-N150 -- 2019 NK6, 2018 XY3|
|F52||Pan-STARRS 2 in Hawaii, 1 in MPEC 2019-N150 -- 2019 NK6|
|C95||SATINO-1 in France, 1 in MPEC 2019-N149 -- 2019 MV1|
|T12||UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 5 in MPECs 2019-N147, 2019-N148 & 2019-N149 -- 2019 GO, 2019 GF20, 2019 AG13, 2018 XY3, 2001 OT|
|I41||Zwicky Transient Facility (ZTF) in southern California, 7 in MPEC 2019-N149 -- 2019 MA, 2015 XC1, 68950, 470951, 441825, 401857, 355256|
|For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.|
Impact Risk Monitoring on 12 July '19
Notes for Today's Latest Risk Assessments
|2019 NP5||JPL Sentry||1500||2106-2116||6||2.74588e-05||-6.26||-6.64||0||JPL: Computed at 07:13 today Pacific time based on 20 observations spanning 5.5086 days (2019-Jul-06.51525 to 2019-Jul-12.023813). Diameter approximately 0.010 km. from weighted mean H=27.57.|
|NEODyS||1500||2111-2116||3||8.13e-06||-6.82||-6.89||0||NEODyS: "Based on 20 optical observations (of which 2 are rejected as outliers) from 2019-07-06.516 to 2019-07-12.025."|
|2019 NO3||JPL Sentry||1500||R E M O V E D||JPL: Risk listing removed at 1356 UTC today|
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 12 July '19
Times are UTC for when items were noted or added by The Tracking News.
|2101||Grabbed MPEC 2019-N151 - 2019 NL6 - see above|
|1750||Generated Traffic Report|
|1500||Noted that JPL Sentry has removed 2019 NO3 as an impact risk - see above|
Noted that JPL Sentry has updated its 2019 NP5 risk assessment - see above
Noted that NEODyS has updated its 2019 NP5 risk assessment - see above
Grabbed MPEC 2019-N147 - 2018 XY3 - see above
Grabbed MPEC 2019-N148 - 2019 AG13 - see above
Grabbed MPEC 2019-N149 - Daily Orbit Update - see above
Grabbed MPEC 2019-N150 - 2019 NK6 - see above