Contents  on 11 May '18

Asteroid/Comet Connection (A/CC) Resources:

The latest A/CC news is available via framed access, RSS news feed 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 11 May '18

Nine objects reported inside ten LD

There are nine asteroidal objects reported within ten lunar distances (LD) of our home world today. Nearest are 2016 HP6, inbound from 3.35 to 2.53 LD, and 2018 JP, outbound from 3.18 to 4.56 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
2.08 LD May 9 2018 JP 11 m  3.18 to 4.56 LD May 3 - 15 NHATS target
2.16 LD May 13 2016 HP6 27 m  2.53 from 3.35 LD May 5 - 20 NHATS target - DOU
3.49 LD May 6 2018 JD 16 m  8.92 to 10.61 LD May 1 - 11 exits ten LD, risk
4.33 LD today 2018 JZ 13 m  4.33 LD May 8 - 14 Earth closest at 0904 UTC
4.43 LD May 13 2018 JA1 28 m  4.94 from 5.64 LD May 6 - 20 NHATS target - DOU
5.20 LD May 6 2018 JB 22 m  9.14 to 10.72 LD May 2 - 11 exits ten LD
6.2   LD May 8* 2016 JQ5 8 m  9.1 to 10.9 LD May 4 - 11 Earth passage uncertainty +/- 14.00 hours*, exits ten LD
6.48 LD May 9 388945 2008 TZ3 282 m  7.22 to 8.32 LD May 5 - 13
7.44 LD May 14 2018 JL1 15 m  7.95 from 8.48 LD May 8 - 19 risk

This report was generated at 2010 UTC with the unexpected recovery of already departed 2014 JR25 (MPEC), which passed Earth at 6.49  on May 4th, and with first follow-up for approaching risk-listed 2018 JG1, inbound 2018 JA1, and departed 2018 JW, along with continuing follow-up for approaching objects 2018 JX, 2018 EJ4, 2015 DP155, and risk-listed intruder 2010 WC9, and for inbound 2016 HP6 and departed 2018 JM.

Approaching Traffic - sorted by 10-LD bubble entry date
Earth passage I D ~Size Distance today  Inside ten LD Notes
0.53 LD May 15 2010 WC9 68 m  11.19 from 14.04 LD tomorrow - May 19 intruder - DOU
8.78 LD May 14 2018 JY 50 m  10.85 from 12.41 LD tomorrow - May 16
3.88 LD May 16 2018 JX 74 m  13.16 from 15.98 LD May 13 - 19 DOU
5.29 LD May 20 2018 JG1 41 m  15.77 from 17.51 LD May 15 - 24 risk - DOU
9.50 LD May 29 68347 2001 KB67 371 m  53.11 from 56.23 LD May 28 - 30 radar target
5.56 LD June 10 2018 EJ4 186 m  40.86 from 42.15 LD June 4 - 16 radar/NHATS target - DOU
8.96 LD June 11 2015 DP155 162 m  29.67 from 30.47 LD June 6 - 15 NHATS target - DOU



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 11 May '18

The MPC's NEO Confirmation Page has 27 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 27 objects listed. Of these, five were "one nighters." So far The Tracking News has counted a total of 29 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 May '18

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been six MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2018-J57 - "14:09 UT" - 2017 KU34


MPEC 2018-J56 - "14:06 UT" - 2015 TN237


MPEC 2018-J55 - "14:03 UT" - 2015 RB82


<< DOU on 11 May '18 >>  MPEC 2018-J54 - "12:05 UT" - Daily Orbit Update


MPEC 2018-J53 - "11:18 UT" - 2014 JR25


MPEC 2018-J52 - "02:20 UT" - 2018 JS1

Observers  on 11 May '18

A total of 25 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 7 in MPEC 2018-J54 -- 2018 HO1, 2018 GV, 2018 GD, 2018 FE2, 2017 MT8, 2012 OZ, 2004 XE6
T05ATLAS Haleakala in Hawaii, 5 in MPEC 2018-J54 -- 2018 GL1, 2018 EJ4, 2017 WH14, 2015 DP155, 2010 MS1
T08ATLAS Mauna Loa in Hawaii, 15 in MPECs 2018-J53 & 2018-J54 -- 2018 JM1, 2018 JA1, 2018 HV2, 2016 HP6, 2014 JR25, 85628, 66251, 475967, 450648, 36183, 25916, 154656, 1627, 1036, 719
160Castelmartini Obs. in Italy, 6 in MPEC 2018-J54 -- 374851, 172034, 163243, 141484, 8037, 3122
703Catalina Sky Survey (CSS) in Arizona, 26 in MPEC 2018-J54 -- 2018 JM1, 2018 JE, 2018 HL2, 2018 FS3, 2017 VL15, 2016 JP, 2016 HP6, 2015 TX143, 2013 QH10, 2001 SC170, 516457, 516454, 514652, 463664, 411201, 37655, 285339, 220839, 164121, 154993, 152964, 138847, 11066, 9856, 8037, 3122
850Cordell-Lorenz Obs. in Tennessee, 2 in MPECs 2018-J53 & 2018-J54 -- 2014 JR25, 475967
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 7 in MPECs 2018-J53, 2018-J54, 2018-J55, 2018-J56 & 2018-J57 -- 2018 JM1, 2018 HJ2, 2017 KU34, 2015 TN237, 2015 RB82, 2014 JR25, 2012 FN62
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2018-J54 -- 2018 JM1
J95Great Shefford Obs. in England, 1 in MPEC 2018-J52 -- 2018 JS1
G48Harlingten Research Obs. in New Mexico, 1 in MPEC 2018-J54 -- 2018 BY2
W19Kalamazoo Obs. in Michigan, 3 in MPEC 2018-J54 -- 164121, 138847, 1627
G96Mt. Lemmon Survey (MLS) in Arizona, 18 in MPEC 2018-J54 -- 2018 JS1, 2018 GX4, 2018 EQ4, 2018 BY2, 2014 JC31, 2012 FN62, 96315, 516428, 511808, 508767, 498548, 497117, 475967, 367390, 361754, 8709, 6037, 1627
J69North Obs. in England, 1 in MPEC 2018-J54 -- 2010 WC9
F51Pan-STARRS 1 in Hawaii, 1 in MPEC 2018-J52 -- 2018 JS1
F52Pan-STARRS 2 (PS2) in Hawaii, 4 in MPECs 2018-J52 & 2018-J54 -- 2018 JS1, 2018 HV2, 450648, 350713
A53Peschiera del Garda Obs. in Italy, 4 in MPEC 2018-J54 -- 2018 JX, 2018 JA1, 2018 BY2, 2016 HP6
D29Purple Mtn. Obs. Xuyi Station in China, 1 in MPEC 2018-J54 -- 9856
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2018-J54 -- 2018 JM1
C95SATINO-1 in France, 1 in MPEC 2018-J54 -- 15745
G409B. Lutkenhoner in Germany via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2018-J53 -- 2014 JR25
691Spacewatch 0.9m telescope in Arizona, 4 in MPECs 2018-J54 & 2018-J57 -- 2017 KU34, 89830, 516428, 5604
291Spacewatch 1.8m telescope in Arizona, 3 in MPECs 2018-J53 & 2018-J54 -- 2018 JG1, 2018 JF1, 2014 JR25
I52Steward Obs. Mt. Lemmon Station in Arizona, 28 in MPECs 2018-J53 & 2018-J54 -- 2018 JX, 2018 JW, 2018 JO, 2018 JM, 2018 JK, 2018 JE, 2018 JC, 2018 JA1, 2018 HV2, 2018 GX4, 2018 GT1, 2018 GQ5, 2018 GL1, 2018 GF4, 2018 GA5, 2018 FV4, 2018 EQ4, 2018 EJ4, 2018 DB2, 2018 BY2, 2017 WH14, 2017 VL15, 2017 GT5, 2015 MB54, 2015 JP, 2015 FR117, 2014 JR25, 2013 KY5
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2018-J54 -- 2018 GL2
L01Visnjan Obs., 1 in MPEC 2018-J53 -- 2014 JR25
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 11 May '18

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2358 UTC)
See the CRT page for a list of all objects rated recently as risks and our ephemerides page for a list of risk-listed objects under current observation.
The time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090. Both also post impact solutions beyond 100 years for a few special objects.
For the latest official risk assessments, and for explanations of the terminology, see the NASA/JPL Sentry and NEODyS CLOMON2 risk pages.
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 JL1NEODyS16302112-211822.68e-08-8.85-8.88n/aNEODyS: "Based on 29 optical observations (of which 0 are rejected as outliers) from 2018-05-08.265 to 2018-05-10.253."
2018 JG1JPL Sentry16302103-210313.109e-08-7.63-7.630JPL: Computed at 07:21 today Pacific time based on 46 observations spanning 3.0165 days (2018-May-08.17968 to 2018-May-11.19618). Diameter approximately 0.041 km. from weighted mean H=24.58.
NEODyS16302103-211856.74e-07-6.34-6.72n/aNEODyS: "Based on 43 optical observations (of which 0 are rejected as outliers) from 2018-05-08.180 to 2018-05-10.194."
2018 JF1JPL Sentry1630R E M O V E DJPL: Risk listing removed at 1424 UTC today
NEODyS16302045-2118321.05e-07-5.77-6.51n/aNEODyS: "Based on 32 optical observations (of which 0 are rejected as outliers) from 2018-05-08.180 to 2018-05-10.157."
2018 HJ2JPL Sentry16302085-208515.048e-04-3.21-3.210JPL: Computed at 07:01 today Pacific time based on 87 observations spanning 17.568 days (2018-Apr-23.41101 to 2018-May-10.978687). Diameter approximately 0.046 km. from weighted mean H=24.33.
2018 GL2JPL Sentry16302060-206128.822e-09-7.61-7.830JPL: Computed at 07:05 today Pacific time based on 70 observations spanning 29.099 days (2018-Apr-11.23475 to 2018-May-10.333798). Diameter approximately 0.048 km. from weighted mean H=24.25.
2010 WC9NEODyS1630R E M O V E D-

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 11 May '18

Times are UTC for when items were noted or added by The Tracking News.

2010Generated Traffic Report
1630Noted that NEODyS has removed 2010 WC9 as an impact risk - see above
Noted that JPL Sentry has updated its 2018 GL2 risk assessment - see above
Noted that JPL Sentry has updated its 2018 HJ2 risk assessment - see above
Noted that JPL Sentry has removed 2018 JF1 as an impact risk - see above
Noted that NEODyS has posted 2018 JF1 as an impact risk - see above
Noted that JPL Sentry has updated its 2018 JG1 risk assessment - see above
Noted that NEODyS has posted 2018 JG1 as an impact risk - see above
Noted that NEODyS has posted 2018 JL1 as an impact risk - see above
Grabbed MPEC 2018-J53 - 2014 JR25 - see above
Grabbed MPEC 2018-J54 - Daily Orbit Update - see above
Grabbed MPEC 2018-J55 - 2015 RB82 - see above
Grabbed MPEC 2018-J56 - 2015 TN237 - see above
Grabbed MPEC 2018-J57 - 2017 KU34 - see above
0239Grabbed MPEC 2018-J52 - 2018 JS1 - see above