Contents on 11 July '17
- Traffic Report -- three objects
- Radar Astrometry -- one object
- IAU Minor Planet Center
- Observers -- 24 observers
- Impact Risk Monitoring -- one object
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 efforts, and there may be some gaps in our traffic reporting for Earth's Busy Neighborhood.
Asteroid/Comet Connection (A/CC) Resources:
- Consolidated Risk Tables - the CRT page
Of 786 risk-listed objects, 27 have had news in the last 31 days. Updated at 1640 UTC on 11 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 11 July '17
Three objects reported inside ten LD
There are three visitors reported moving within ten lunar distances (LD) of Earth today. Nearest is newly announced 2017 NK2, which is outbound from 2.75 to 3.52 LD, while 2017 MR8 is inbound from 7.14 to 5.81 LD and 2017 MC4 comes its closest to our planet on this passage -- 7.61 LD at 0202 UTC. Up next, NHATS target 2017 BS5 arrives inside ten LD on July 16th.
This report was updated at 2214 UTC with the discovery of 2017 NK2 (MPEC). Your first A/CC asteroid traffic report report was generated at 1833 UTC with follow-up in today's DOU MPEC for 2017 MR8, 2017 MC4, and departed objects 2017 NB and radar target 441987 2010 NY65.
Notes: Ten times the distance to the Moon (ten LD) has no astronomical importance but is a useful boundary for reporting on transient natural objects that approach the actually significant 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 distances are derived by A/CC from JPL Horizons data. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.
Radar Astrometry on 11 July '17
Radar observation of one object
Data update noted at 2331 UTC when the database was dated 11 July
- 2016 UB107 (close passer, NHATS target) from Arecibo (2016 Nov. 21.67 velocity & 21.68 range) - NHATS (ephem.)
NEOCP Activity on 11 July '17
The MPC's NEO Confirmation Page has 17 listings
When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had seventeen objects listed. Of these, nine were "one nighters." So far The Tracking News has counted a total of 32 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 11 July '17
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 2017-N64 time-stamped "11:59 UT" - Daily Orbit Update - see below
- MPEC 2017-N65 time-stamped "19:07 UT" - 2017 NK2 - see below
- MPEC 2017-N66 time-stamped "19:10 UT" - 2017 NL2 - see below
- MPEC 2017-N67 time-stamped "19:13 UT" - 2017 NM2 - see below
- MPEC 2017-N68 time-stamped "21:40 UT" - 2011 CC22
MPEC 2017-N68 - "21:40 UT" - 2011 CC22
- K11C22C 2011 CC22 (Earth MOID=7.9 LD, H=21.0 ~214m) from Pan-STARRS 1 (PS1) (June 2.54p1, 10.51p1, 25.40-43p3, July 5.39-42p2, 10.39-42p3 & 11.35-38p3)
MPEC 2017-N67 - "19:13 UT" - 2017 NM2
- K17N02M 2017 NM2 (i=101.3°, q=5.505 AU, Q=23.903 AU, H=13.4 ~7.08 km) was picked up at 1100 UT on 6 July by PS1, observing it at June 6.51-55p4, July 4.45-48p3, 6.46-49p4, 8.46-50p3, and 10.46-50p4.
MPEC 2017-N66 - "19:10 UT" - 2017 NL2
- K17N02L 2017 NL2 (small asteroid, H=23.1 ~81m) was picked up at 1030 UT on 6 July by ATLAS Haleakala, observing it at July 6.44-47p4. This detection was confirmed by iTelescope Obs. Siding Spring (July 6.81-82p4), Great Shefford Obs. (July 6.97p3), GINOP-KHK (July 6.99p2), GiaGa Obs. (July 7.99-01p2), M57 Obs. (July 8.01-05p3), San Marcello Pistoiese Obs. (July 8.02-03p3), LCOGT Sutherland C (July 8.08-09p3), Sandlot Obs. (July 8.32-33p4), and RMS Obs. (July 9.17-19p3).
MPEC 2017-N65 - "19:07 UT" - 2017 NK2
- K17N02K 2017 NK2 (Earth MOID=2.5 LD, H=26.6 ~16m) was picked up at 0459 UT on 1 July by the Mt. Lemmon Survey (MLS), observing it at July 1.21-24p7 and 1.32p4. This detection was confirmed by Steward Obs. Mt. Lemmon Station (July 1.30-31p4 & 2.18p4) and San Marcello Pistoiese Obs. (July 6.87p3).
- Observations of close-passing objects
- K17N00B 2017 NB (arc=3 days, H=24.9 ~35m) from the Catalina Sky Survey (CSS) (July 1.30p4)
- K17M08R 2017 MR8 (arc=10 days, H=25.0 ~34m) from SATINO-1 (July 9.88-90p2 & 9.95p1)
- K17M04C 2017 MC4 (arc=16 days, H=22.0 ~135m) from Terskol Obs. (June 30.89-00p39) and Castelmartini Obs. (July 6.92p3)
- i1987 441987 2010 NY65 (radar support) from Castelmartini Obs. (July 6.87-88p3)
- Observation campaigns (NHATS targets, radar support)
- J0166 190166 2005 UP156 (radar) from Castelmartini Obs. (July 6.90-91p3), Fabra Obs. (July 7.93-94p4), Astronomical Research Obs. Westfield (July 10.18p5), and Northolt Branch Obs. (July 10.99-01p9)
- 11398 11398 1998 YP11 (radar) from MASTER IAC Obs. (July 8.93p1)
- 06063 6063 Jason (1984 KB) (radar) from ATLAS Haleakala (July 10.40-43p7)
-- Planetary radar schedules: Arecibo & Goldstone
- Observations of small asteroids (H>22.0)
- K17G05S 2017 GS5 (arc=59 days, H=24.0 ~54m) from UH/Tholen NEO Follow-Up 2.24m Telescope (April 20.62p4)
- K17FF7C 2017 FC157 (arc=48 days, H=22.9 ~89m) from Tholen 2.24m (April 20.63p3)
- Observations of other objects
- K17N00H 2017 NH (arc=9 days, H=21.6 ~162m) from Castelmartini Obs. (July 6.89p3) and ATLAS Mauna Loa (July 10.41-44p3)
- K17G06Q 2017 GQ6 (arc=92 days, H=18.9 ~562m) from Tholen 2.24m (April 20.63p2)
- K17B31M 2017 BM31 (arc=164 days, H=20.7 ~245m) from ARO Westfield (July 10.13-14p5)
- K17A19Q 2017 AQ19 (arc=173 days, H=20.7 ~245m) from Tholen 2.24m (April 20.62p4)
- K11E78D 2011 ED78 (Q=5.329 AU, arc=2 opp, H=18.4 ~708m) from ATLAS Haleakala (July 10.38-40p4 & 11.29-32p4)
- K08M01H 2008 MH1 (Q=4.270 AU, arc=2 opp, H=18.4 ~708m) from ATLAS Haleakala (July 10.50-52p4)
- m5652 485652 2011 WO41 from ATLAS Haleakala (July 10.57-60p4)
- c8838 388838 2008 EZ5 from PS1 (July 10.59-60p3)
- N2368 232368 2003 AZ2 from ATLAS Mauna Loa (July 10.56-59p4)
- E2040 142040 2002 QE15 from Castelmartini Obs. (July 6.91p3)
- E1056 141056 2001 XV4 from Castelmartini Obs. (July 6.94p3)
- D6818 136818 Selqet (1997 MW1) from Castelmartini Obs. (July 6.93p3)
- A6589 106589 2000 WN107 from Castelmartini Obs. (July 6.93p3)
- 88254 88254 2001 FM129 from ATLAS Haleakala (July 10.38-41p6)
- 68348 68348 2001 LO7 from ATLAS Haleakala (July 10.42-44p4)
- 66391 66391 1999 KW4 from ARO Westfield (July 10.18-19p5)
- 53430 53430 1999 TY16 from PS1 (July 10.40-43p3)
- 20460 20460 Robwhiteley (1999 LO28) from Castelmartini Obs. (July 6.94-95p3)
- 06053 6053 1993 BW3 from ATLAS Haleakala (July 10.49-52p4)
- 04954 4954 Eric (1990 SQ) from ATLAS Haleakala (July 10.26-29p8)
- 02329 2329 Orthos (1976 WA) from MASTER IAC Obs. (July 9.95-98p6) and ARO Westfield (July 10.10-11p5)
- 01980 1980 Tezcatlipoca (1950 LA) from ARO Westfield (July 10.16-17p5) and ATLAS Haleakala (July 10.36-38p4)
Observers on 11 July '17
A total of 24 observers appear in today's MPECs.
|Code||Observer / observatory|
|251||Arecibo in Puerto Rico, 1 in radar -- 2016 UB107|
|H21||Astronomical Research Obs. Westfield in Illinois, 5 in MPEC 2017-N64 -- 2017 BM31, 66391, 190166, 2329, 1980|
|T05||ATLAS Haleakala in Hawaii, 10 in MPECs 2017-N64 & 2017-N66 -- 2017 NL2, 2011 ED78, 2008 MH1, 88254, 68348, 485652, 6063, 6053, 4954, 1980|
|T08||ATLAS Mauna Loa in Hawaii, 2 in MPEC 2017-N64 -- 2017 NH, 232368|
|160||Castelmartini Obs. in Italy, 9 in MPEC 2017-N64 -- 2017 NH, 2017 MC4, 441987, 20460, 190166, 142040, 141056, 136818, 106589|
|703||Catalina Sky Survey in Arizona, 1 in MPEC 2017-N64 -- 2017 NB|
|006||Fabra Obs. in Spain, 1 in MPEC 2017-N64 -- 190166|
|203||GiaGa Obs. in Italy, 1 in MPEC 2017-N66 -- 2017 NL2|
|K88||GINOP-KHK in Hungary, 1 in MPEC 2017-N66 -- 2017 NL2|
|J95||Great Shefford Obs. in England, 1 in MPEC 2017-N66 -- 2017 NL2|
|Q62||iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2017-N66 -- 2017 NL2|
|K93||LCOGT Sutherland C in South Africa, 1 in MPEC 2017-N66 -- 2017 NL2|
|K38||M57 Obs. in Italy, 1 in MPEC 2017-N66 -- 2017 NL2|
|Z22||MASTER IAC Obs. in the Canary Islands, 2 in MPEC 2017-N64 -- 11398, 2329|
|G96||Mt. Lemmon Survey in Arizona, 1 in MPEC 2017-N65 -- 2017 NK2|
|Z80||Northolt Branch Obs. in England, 1 in MPEC 2017-N64 -- 190166|
|F51||Pan-STARRS 1 (PS1) in Hawaii, 4 in MPECs 2017-N64, 2017-N67 & 2017-N68 -- 2017 NM2, 2011 CC22, 53430, 388838|
|W25||RMS Obs., 1 in MPEC 2017-N66 -- 2017 NL2|
|104||San Marcello Pistoiese Obs. in Italy, 2 in MPECs 2017-N65 & 2017-N66 -- 2017 NL2, 2017 NK2|
|H36||Sandlot Obs. in Kansas, 1 in MPEC 2017-N66 -- 2017 NL2|
|C95||SATINO-1 in France, 1 in MPEC 2017-N64 -- 2017 MR8|
|I52||Steward Obs. Mt. Lemmon Station in Arizona, 1 in MPEC 2017-N65 -- 2017 NK2|
|B18||Terskol Obs. in Russia, 1 in MPEC 2017-N64 -- 2017 MC4|
|T12||UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 4 in MPEC 2017-N64 -- 2017 GS5, 2017 GQ6, 2017 FC157, 2017 AQ19|
|For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.|
Impact Risk Monitoring on 11 July '17
Notes for Today's Latest Risk Assessments
|2017 MB1||NEODyS||1640||2098||2||4.33e-08||-4.23||-4.27||0||NEODyS: "Based on 204 optical observations (of which 1 are rejected as outliers) from 2017-06-19.315 to 2017-07-09.270."|
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 11 July '17
Times are UTC for when items were noted or added by The Tracking News.
|2331||Noted Radar Astrometry database update - see above|
|2214||Updated Traffic Report|
|2206||Grabbed MPEC 2017-N68 - 2011 CC22 - see above|
|2014||Grabbed MPEC 2017-N65 - 2017 NK2 - see above|
Grabbed MPEC 2017-N66 - 2017 NL2 - see above
Grabbed MPEC 2017-N67 - 2017 NM2 - see above
|1640||Noted that NEODyS has updated its 2017 MB1 risk assessment - see above|
|1400||Grabbed MPEC 2017-N64 - Daily Orbit Update - see above|