Contents on 11 May '17
- Traffic Report -- seven objects
- IAU Minor Planet Center
- Observers -- twelve observers
- Impact Risk Monitoring -- one object
Asteroid/Comet Connection (A/CC) Resources:
- Consolidated Risk Tables - the CRT page
Of 828 risk-listed objects, 445 have had news in the last 31 days. Updated at 1547 UTC on 11 May.
- Ephemerides for risk-rated, nearby objects & NHATS targets
- News archive (old) & news image catalog (discontinued)
- Object Links - mainly for radar targets & close passers (mostly discontinued)
- Observing Campaigns (revised 8 April)
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 May '17
Seven objects reported inside ten LD
Today seven visitors are reported moving within ten lunar distances (LD) of Earth. Nearest are 2017 JA2, inbound from 4.17 to 2.81 LD, and risk-listed 2017 JX1, which comes its closest to our planet on this passage, reaching 3.71 LD at 0249 UTC.
|Earth passage||I D||~Size||Distance Today||Notes|
|0.14 LD May 4||2017 JB2||5 m||4.81 to 5.48 LD||intruder, risk|
|2.34 LD May 8||2017 JV1||20 m||5.85 to 8.22 LD|
|2.57 LD tomorrow||2017 JA2||41 m||2.81 from 4.17 LD||DOU|
|3.70 LD May 8||2017 HX4||18 m||7.66 to 10.09 LD||exits ten LD|
|3.71 LD today||2017 JX1||21 m||3.71 LD||risk, Earth closest at 0249 UTC|
|5.55 LD today||2017 HU49||18 m||5.55 LD||Earth closest at 2139 UTC|
|8.88 LD May 9||2017 JY1||31 m||9.31 to 10.02 LD||exits ten LD|
|5.09 LD May 15||2017 JM2||50 m||< 10 LD tomorrow|
|7.93 LD May 29||2017 CS||446 m||< 10 LD May 26, radar target - DOU|
This report was generated at 1836 UTC with follow-up in today's DOU MPEC for 2017 JA2 and 2017 CS along with astrometry from February for NHATS target 2017 DA36.
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.
NEOCP Activity on 11 May '17
The MPC's NEO Confirmation Page has 24 listings
When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 24 objects listed. Of these, eleven were "one nighters."
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 May '17
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.
- Observations of recently (no longer) risk-listed objects
- K17G07M 2017 GM7 (arc=29 days, H=18.7 ~616m) from UH/Tholen NEO Follow-Up 2.24m Telescope (April 22.25p3)
- Observations of close-passing objects
- K17J02A 2017 JA2 (arc=7 days, H=24.6 ~41m) from Great Shefford Obs. (May 10.91-92p3), Nonndorf Obs. (May 10.92-93p5), North Obs. (May 10.94p3), and Wiggins Obs. (May 11.24p5)
- K17D36A 2017 DA36 (arc=23 days, H=25.1 ~32m, NHATS target) from Schiaparelli Obs. (Feb. 16.00-02p2)
- K17C00S 2017 CS (Q=4.183 AU, arc=110 days, H=19.6 ~407m, radar support) from ATLAS Haleakala (May 10.30-34p4)
- Observation campaigns (NHATS targets, radar support)
- E3404 143404 2003 BD44 (radar) from Kourovskaya Obs. (March 31.89-91p3, 31.95p1, April 1.85-86p2 & 1.93p2)
- 11398 11398 1998 YP11 (radar) from Landehen Obs. (April 17.89-95p3 & May 7.90-97p4)
- 05604 5604 1992 FE (radar) from Pan-STARRS 1 (PS1) (May 10.26-28p3)
-- NHATS target table & ephemerides -- Planetary radar schedules: Arecibo & Goldstone
- Observations of other objects
- K17F64X 2017 FX64 (arc=31 days, H=20.1 ~323m) from Tholen 2.24m (April 22.24p1)
- m0984 480984 2003 YR70 from PS1 (May 10.26-30p3)
- l5665 475665 2006 VY13 from Northolt Branch Obs. (May 9.97p2)
- P2793 252793 2002 FW5 from PS1 (May 10.27-28p2)
- J0166 190166 2005 UP156 from Northolt Branch Obs. (May 9.96p3)
- 90075 90075 2002 VU94 from Landehen Obs. (April 17.87-92p3)
- 87024 87024 2000 JS66 from PS1 (May 10.26-29p4)
- 01917 1917 Cuyo (1968 AA) from CASADO (April 20.98p1 & 21.14-16p2)
- 01036 1036 Ganymed (1924 TD) from ATLAS Haleakala (May 10.24-31p8)
Observers on 11 May '17
Twelve observers appear in today's MPEC.
|Code||Observer / observatory|
|T05||ATLAS Haleakala in Hawaii, 2 in MPEC 2017-J66 -- 2017 CS, 1036|
|G36||CASADO in Spain, 1 in MPEC 2017-J66 -- 1917|
|J95||Great Shefford Obs. in England, 1 in MPEC 2017-J66 -- 2017 JA2|
|168||Kourovskaya Obs. in Russia, 1 in MPEC 2017-J66 -- 143404|
|Z43||Landehen Obs., 2 in MPEC 2017-J66 -- 90075, 11398|
|C47||Nonndorf Obs. in Austria, 1 in MPEC 2017-J66 -- 2017 JA2|
|J69||North Obs. in England, 1 in MPEC 2017-J66 -- 2017 JA2|
|Z80||Northolt Branch Obs. in England, 2 in MPEC 2017-J66 -- 475665, 190166|
|F51||Pan-STARRS 1 (PS1) in Hawaii, 4 in MPEC 2017-J66 -- 87024, 480984, 252793, 5604|
|204||Schiaparelli Obs. in Italy, 1 in MPEC 2017-J66 -- 2017 DA36|
|T12||UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPEC 2017-J66 -- 2017 GM7, 2017 FX64|
|718||Wiggins Obs. in Utah, 1 in MPEC 2017-J66 -- 2017 JA2|
|For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.|
Impact Risk Monitoring on 11 May '17
Notes for Today's Latest Risk Assessments
|2017 JX1||NEODyS||1544||2091||1||7.96e-08||-7.87||-7.87||0||NEODyS: "Based on 45 optical observations (of which 4 are rejected as outliers) from 2017-05-04.136 to 2017-05-10.038."|
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.