Contents on 26 May '18
- Traffic Report -- six objects
- IAU Minor Planet Center
- NEOCP Activity -- 20 listings
- New MPECs -- four MPECs
- Observers -- 22 observers
- Impact Risk Monitoring -- two objects
- Chronology
Asteroid/Comet Connection (A/CC) Resources:
- Consolidated Risk Tables - the CRT page
Of 935 risk-listed objects, 52 have had news in the last 31 days. Updated at 2359 UTC on 26 May.
- 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.
Traffic Report on 26 May '18
Six objects reported inside ten LD
Six minor planets are reported within ten lunar distances (LD) of Earth today. Nearest of these is intruder 2018 KW1, which moves out from 3.96 to 5.52 LD.
| Neighborhood Traffic - sorted by Earth passage distance, grouped by 1.0, 2.41, 5.0 & 10.0 LD boundaries | |||||
| Earth passage | I D | ~Size | Distance today | Inside ten LD | Notes |
| 0.39 LD May 23 | 2018 KW1 | 4 m | 3.96 to 5.52 LD | May 17 - 29 | intruder, NHATS target |
| 2.05 LD May 22 | 2018 KS | 9 m | 6.88 to 8.53 LD | May 16 - 27 | NHATS target |
| 2.24 LD May 21 | 2018 KF1 | 25 m | 9.18 to 11.05 LD | May 16 - 26 | exits ten LD - DOU |
| 2.48 LD May 23 | 2018 KT2 | 14 m | 6.22 to 8.03 LD | May 18 - 28 | NHATS target - DOU |
| 3.13 LD May 21 | 2018 KU2 | 15 m | 8.23 to 9.80 LD | May 15 - 27 | NHATS target |
| 6.10 LD May 29 | 2018 KN2 | 27 m | 7.74 from 8.97 LD | yesterday - June 3 | |
This report was generated at 1753 UTC with follow-up in today's DOU MPEC for four objects in the active traffic tables here plus departed objects 2018 JX and 2018 HO.
| Approaching Traffic - sorted by 10-LD bubble entry date | |||||
| Earth passage | I D | ~Size | Distance today | Inside ten LD | Notes |
| 9.50 LD May 29 | 68347 2001 KB67 | 371 m | 11.42 from 13.32 LD | May 28 - 30 | radar target |
| 5.56 LD June 10 | 2018 EJ4 | 186 m | 21.22 from 22.54 LD | June 4 - 16 | radar/NHATS target - DOU |
| 8.96 LD June 11 | 2015 DP155 | 162 m | 17.32 from 18.13 LD | June 6 - 15 | NHATS target - DOU |
<< Reading: We'd like to point you to a couple of interesting news articles. One tells about searching for meteorites in Morocco and the other about finding minor planets beyond Neptune.
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. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.
NEOCP Activity on 26 May '18
The MPC's NEO Confirmation Page has 20 listings
When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 20 objects listed. Of these, seven were "one nighters." So far The Tracking News has counted a total of 25 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 26 May '18
Minor Planet Electronic Circulars
As of last check at 2358 UTC, there have been four MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- MPEC 2018-K91 time-stamped "12:07 UT" - Daily Orbit Update - see below
- MPEC 2018-K92 time-stamped "14:24 UT" - 2018 KV2 - see below
- MPEC 2018-K93 time-stamped "14:28 UT" - 2018 KW2 - see below
- MPEC 2018-K94 time-stamped "14:32 UT" - 2018 KX2
MPEC 2018-K94 - "14:32 UT" - 2018 KX2
- K18K02X 2018 KX2 (small asteroid, Earth MOID=9.5 LD, H=25.6 ~26m) was picked up at 0804 UT on 24 May by the Mt. Lemmon Survey (MLS), observing it at May 24.34-35p4. This detection was confirmed by Steward Obs. Mt. Lemmon Station (May 24.43p4 & 25.27p3) and San Marcello Pistoiese Obs. (May 25.94-96p3).
MPEC 2018-K93 - "14:28 UT" - 2018 KW2
- K18K02W 2018 KW2 (small asteroid, H=24.5 ~43m) was picked up at 0653 UT on 24 May by MLS, observing it at May 24.29-30p4. This detection was confirmed by Steward Mt. Lemmon Sta. (May 24.34-35p4 & 25.15p4), Schiaparelli Obs. (May 24.99-02p5), McCarthy Obs. (May 25.19-22p4 & 26.19-21p4), San Marcello Pistoiese Obs. (May 25.83-84p4), and Castelmartini Obs. (May 25.88-89p5).
MPEC 2018-K92 - "14:24 UT" - 2018 KV2
- K18K02V 2018 KV2 (small asteroid, H=25.1 ~32m) was picked up at 1310 UT on 23 May by Pan-STARRS 1 (PS1), observing it at May 23.55-58p4. This detection was confirmed by Steward Mt. Lemmon Sta. (May 24.30p3), Astronomical Research Obs. Westfield (May 25.30-31p2), and San Marcello Pistoiese Obs. (May 25.97-99p2).
<< DOU on 26 May '18 >> MPEC 2018-K91 - "12:07 UT" - Daily Orbit Update
- Observations of risk-listed objects
- K18J02C 2018 JC2 (small asteroid, Q=4.849 AU, arc=15 days, H=22.8 ~93m) from UH/Tholen NEO Follow-Up 2.24m Telescope (May 24.37p1 at G=22.65)
- Observations of recently (no longer) risk-listed objects
- K18K01F 2018 KF1 (small asteroid, arc=5 days, H=25.8 ~23m, close passer) from Rand II Obs. (May 21.22p2)
- K18J05D 2018 JD5 (arc=10 days, H=19.0 ~537m) from Tholen 2.24m (May 24.60p3)
- Observations of close-passing objects
- K18K02T 2018 KT2 (arc=1 day, H=26.9 ~14m, NHATS target) from Arcadia Obs. (May 25.55-57p3)
- K18J00X 2018 JX (arc=11 days, H=23.4 ~71m) from Rand II Obs. (May 14.18-19p6)
- K18H00O 2018 HO (arc=35 days, H=26.7 ~15m, NHATS target) from Tholen 2.24m (May 23.53p1 at G=23.79)
- K18E04J 2018 EJ4 (arc=73 days, H=21.3 ~186m, NHATS target, radar support) from M57 Obs. (May 24.84-88p3 & 25.84-86p3), the Catalina Sky Survey (CSS) (May 25.31-32p4), LCO Haleakala OGG B#2 (May 25.53-56p8), and Modra Obs. (May 25.99-00p2 & 26.05p1)
- K15DF5P 2015 DP155 (arc=2 opp, H=21.4 ~178m, NHATS target) from Rand II Obs. (May 25.12-13p5)
- Observations of small asteroids (H>22.0)
- K18K01L 2018 KL1 (arc=6 days, H=22.3 ~117m) from CSS (May 25.39-41p3)
- Observations of other objects
- K18K02R 2018 KR2 (arc=4 days, H=19.1 ~513m) from PS1 (May 25.57-60p3) and Arcadia Obs. (May 25.63-70p4)
- K18K01M 2018 KM1 (q=0.354 AU, arc=6 days, H=20.8 ~234m) from Rand II Obs. (May 24.15-16p4)
- K18J03K 2018 JK3 (i=43.2°, arc=10 days, H=21.7 ~155m) from MLS (May 25.25p4)
- K18J03B 2018 JB3 (i=40.4°, Q=0.882 AU, arc=15 days, H=17.5 ~1.07 km) from GINOP-KHK (May 24.04p3)
- K18J00A 2018 JA (arc=22 days, H=20.4 ~282m) from Rand II Obs. (May 18.15p3, 19.10p2, 19.15p3 & 21.11-12p5), MLS (May 25.15-17p4), PS1 (May 25.27-31p3), and ATLAS Haleakala (May 25.34-38p4)
- K17W14H 2017 WH14 (arc=2 opp, H=18.1 ~812m) from MLS (May 25.29-30p4)
- o4034 504034 2005 UJ159 from WISE (May 23.98p1, 24.11p1, 24.24p1, 24.57p1 & 24.70p1)
- P9802 259802 2004 BJ86 from PS1 (May 25.37-40p3)
- G2269 162269 1999 VO6 from MLS (May 25.44-46p4)
- F2931 152931 2000 EA107 from ATLAS Haleakala (May 25.32-35p4)
- D8847 138847 2000 VE62 from CSS (May 25.29-30p4) and Pan-STARRS 2 (PS2) (May 25.30-33p3)
- 85989 85989 1999 JD6 from CSS (May 25.22-23p4)
- 15745 15745 Yuliya (1991 PM5) from the Palomar Transient Factory (PTF) (May 24.34-36p2, 24.40-46p3, 25.28-29p2 & 25.36-40p2) and ATLAS Haleakala (May 25.53-56p7)
- 09856 9856 1991 EE from CSS (May 25.17-19p4)
- 06456 6456 Golombek (1992 OM) from ATLAS Mauna Loa (May 25.57-58p3)
- 04257 4257 Ubasti (1987 QA) from MLS (May 25.36-38p4)
- 01866 1866 Sisyphus (1972 XA) from CSS (May 25.24-25p4)
- 01627 1627 Ivar (1929 SH) from Bamberg Obs. (May 24.89-90p3 & 25.93-04p4) and ATLAS Haleakala (May 25.45-48p4)
Observers on 26 May '18
A total of 22 observers appear in today's MPECs.
| Code | Observer / observatory |
|---|---|
| E23 | Arcadia Obs. in New South Wales, 2 in MPEC 2018-K91 -- 2018 KT2, 2018 KR2 |
| H21 | Astronomical Research Obs. Westfield in Illinois, 1 in MPEC 2018-K92 -- 2018 KV2 |
| T05 | ATLAS Haleakala in Hawaii, 4 in MPEC 2018-K91 -- 2018 JA, 15745, 152931, 1627 |
| T08 | ATLAS Mauna Loa in Hawaii, 1 in MPEC 2018-K91 -- 6456 |
| K46 | Bamberg Obs. in Germany, 1 in MPEC 2018-K91 -- 1627 |
| 160 | Castelmartini Obs. in Italy, 1 in MPEC 2018-K93 -- 2018 KW2 |
| 703 | Catalina Sky Survey (CSS) in Arizona, 6 in MPEC 2018-K91 -- 2018 KL1, 2018 EJ4, 85989, 138847, 9856, 1866 |
| K88 | GINOP-KHK in Hungary, 1 in MPEC 2018-K91 -- 2018 JB3 |
| T04 | LCO Haleakala OGG B#2 in Hawaii, 1 in MPEC 2018-K91 -- 2018 EJ4 |
| K38 | M57 Obs. in Italy, 1 in MPEC 2018-K91 -- 2018 EJ4 |
| 932 | McCarthy Obs. in Connecticut, 1 in MPEC 2018-K93 -- 2018 KW2 |
| 118 | Modra Obs. in Slovakia, 1 in MPEC 2018-K91 -- 2018 EJ4 |
| G96 | Mt. Lemmon Survey (MLS) in Arizona, 7 in MPECs 2018-K91, 2018-K93 & 2018-K94 -- 2018 KX2, 2018 KW2, 2018 JK3, 2018 JA, 2017 WH14, 162269, 4257 |
| I41 | Palomar Transient Factory in southern California, 1 in MPEC 2018-K91 -- 15745 |
| F51 | Pan-STARRS 1 (PS1) in Hawaii, 4 in MPECs 2018-K91 & 2018-K92 -- 2018 KV2, 2018 KR2, 2018 JA, 259802 |
| F52 | Pan-STARRS 2 in Hawaii, 1 in MPEC 2018-K91 -- 138847 |
| W71 | Rand II Obs. in New York, 5 in MPEC 2018-K91 -- 2018 KM1, 2018 KF1, 2018 JX, 2018 JA, 2015 DP155 |
| 104 | San Marcello Pistoiese Obs. in Italy, 3 in MPECs 2018-K92, 2018-K93 & 2018-K94 -- 2018 KX2, 2018 KW2, 2018 KV2 |
| 204 | Schiaparelli Obs. in Italy, 1 in MPEC 2018-K93 -- 2018 KW2 |
| I52 | Steward Obs. Mt. Lemmon Station in Arizona, 3 in MPECs 2018-K92, 2018-K93 & 2018-K94 -- 2018 KX2, 2018 KW2, 2018 KV2 |
| T12 | UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 3 in MPEC 2018-K91 -- 2018 JD5, 2018 JC2, 2018 HO |
| C51 | WISE in Earth polar orbit, 1 in MPEC 2018-K91 -- 504034 |
| For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page. | |
Impact Risk Monitoring on 26 May '18
| 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 |
| 2018 JC2 | NEODyS | 2358 | R E M O V E D | - | |||||
| JPL Sentry | 1600 | R E M O V E D | JPL: Risk listing removed at 1359 UTC today | ||||||
| 2018 JN | NEODyS | 2358 | 2100 | 2 | 6.52e-06 | -5.58 | -5.58 | 0 | NEODyS: "Based on 143 optical observations (of which 1 are rejected as outliers) from 2018-05-05.424 to 2018-05-25.436." |
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 26 May '18
Times are UTC for when items were noted or added by The Tracking News.
| 2358 | Noted that NEODyS has removed 2018 JC2 as an impact risk - see above Noted that NEODyS has updated its 2018 JN risk assessment - see above |
| 1753 | Generated Traffic Report |
| 1600 | Noted that JPL Sentry has removed 2018 JC2 as an impact risk - see above Grabbed MPEC 2018-K91 - Daily Orbit Update - see above Grabbed MPEC 2018-K92 - 2018 KV2 - see above Grabbed MPEC 2018-K93 - 2018 KW2 - see above Grabbed MPEC 2018-K94 - 2018 KX2 - see above |
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