Contents  on 7 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 7 May '18

Six objects reported inside ten LD

Bulletin - 0022 UTC 8 May:  Two new discoveries of close passers have been announced.

Earth passageI D~Size~Inside ten LDNotes
4.47 LD at 1948 UTC April 302018 JN34 m April 25 - May 6MPEC
6.54 LD at 1448 UTC April 302018 JM59 m April 27 - May 4MPEC



There are six minor planets reported inside ten lunar distances (LD) of Earth today. Nearest is outbound risk-listed 2018 JD, which moves away from 3.62 to 4.45 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
2.16 LD May 13 2016 HP6 27 m  6.68 from 7.87 LD May 5 - 20 NHATS target - DOU
3.49 LD yesterday 2018 JD 16 m  3.62 to 4.45 LD May 1 - 11 risk - DOU
5.20 LD yesterday 2018 JB 22 m  5.20 to 5.54 LD May 2 - 11 DOU
6.2   LD tomorrow* 2016 JQ5 8 m  6.2 from 6.8 LD May 4 - 11 Earth passage uncertainty +/- 14.00 hours*
6.48 LD May 9 388945 2008 TZ3 282 m  7.09 from 8.13 LD May 5 - 13 DOU
9.65 LD today 1999 FN19 112 m  9.65 LD May 5 - 9 radar/NHATS target, Earth closest at 1357 UTC

This report was generated at 1821 UTC with the recovery of distant 2015 BL311 and first follow-up for outbound risk-listed 2018 JD in today's DOU MPEC along with continuing follow-up for approaching objects 2018 EJ4 and 2015 DP155, inbound objects 2016 HP6 (first follow-up to its recovery) and 388945 2008 TZ3, outbound 2018 JB, departed 2018 HM2, and distant 2002 JR100.

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  65.77 from 69.00 LD May 28 - 30 radar target
5.56 LD June 10 2018 EJ4 186 m  45.98 from 47.25 LD June 4 - 16 radar/NHATS target - DOU
8.96 LD June 11 2015 DP155 162 m  32.86 from 33.64 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. "Distant" is used here to describe objects that have approached Earth within ten LD since A/CC began these traffic reports eleven years ago but are not presently coming so close. 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 7 May '18

The MPC's NEO Confirmation Page has 16 listings

When last checked at 2343 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had sixteen objects listed. Of these, four were "one nighters." The Tracking News counted a total of nineteen listings on the NEOCP on this day.

New MPECs  on 7 May '18

Minor Planet Electronic Circulars

There were seven MPECs posted this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2018-J23 - "23:58 UT" - 2018 JN


MPEC 2018-J22 - "23:55 UT" - 2018 JM


MPEC 2018-J21 - "23:51 UT" - 2018 JL


MPEC 2018-J20 - "23:47 UT" - 2018 JK


MPEC 2018-J19 - "23:45 UT" - 2018 JJ


<< DOU on 7 May '18 >>  MPEC 2018-J18 - "12:04 UT" - Daily Orbit Update


MPEC 2018-J17 - "10:30 UT" - 2015 BL311

Observers  on 7 May '18

A total of 39 observers appeared in this day's MPECs.

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 2 in MPECs 2018-J22 & 2018-J23 -- 2018 JN, 2018 JM
H21Astronomical Research Obs. Westfield in Illinois, 10 in MPEC 2018-J18 -- 2018 HG2, 2018 GW3, 2018 GJ5, 2018 GE4, 2018 GB4, 2017 SL33, 2017 RP2, 2016 EL84, 2012 EU14, 2009 BM2
T05ATLAS Haleakala in Hawaii, 4 in MPEC 2018-J18 -- 85989, 220839, 164121, 152931
160Castelmartini Obs. in Italy, 15 in MPEC 2018-J18 -- 2018 GY1, 2018 FQ5, 2018 BY2, 85628, 66251, 498548, 475967, 388945, 374851, 337084, 194126, 172034, 163243, 138847, 9856
703Catalina Sky Survey (CSS) in Arizona, 18 in MPECs 2018-J18, 2018-J21, 2018-J22 & 2018-J23 -- 2018 JN, 2018 JM, 2018 JL, 2018 HL2, 2017 WH14, 2017 BD29, 2016 JP, 2015 DP155, 513182, 438430, 416801, 37655, 285339, 220839, 185853, 164201, 152931, 1866
V06Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) in Arizona, 7 in MPECs 2018-J18, 2018-J19 & 2018-J20 -- 2018 JK, 2018 JJ, 2018 GZ4, 2018 GT3, 2017 YH5, 2017 UV42, 2016 JN
309'Martin Altmann in Germany via Cerro Paranal in Chile, 1 in MPEC 2018-J17 -- 2015 BL311
K87Dettelbach Vineyard Obs. in Germany, 4 in MPECs 2018-J19, 2018-J21, 2018-J22 & 2018-J23 -- 2018 JN, 2018 JM, 2018 JL, 2018 JJ
734Farpoint Obs. in Kansas, 5 in MPECs 2018-J19, 2018-J20, 2018-J21, 2018-J22 & 2018-J23 -- 2018 JN, 2018 JM, 2018 JL, 2018 JK, 2018 JJ
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2018-J22 -- 2018 JM
K88GINOP-KHK in Hungary, 5 in MPECs 2018-J19, 2018-J20, 2018-J21, 2018-J22 & 2018-J23 -- 2018 JN, 2018 JM, 2018 JL, 2018 JK, 2018 JJ
J95Great Shefford Obs. in England, 7 in MPECs 2018-J18, 2018-J19, 2018-J20, 2018-J21, 2018-J22 & 2018-J23 -- 2018 JN, 2018 JM, 2018 JL, 2018 JK, 2018 JJ, 2018 JD, 2018 JB
A17Guidestar Obs. in Germany, 5 in MPECs 2018-J18, 2018-J21 & 2018-J22 -- 2018 JM, 2018 JL, 2018 JC, 2018 EJ4, 212359
G48Harlingten Research Obs. in New Mexico, 1 in MPEC 2018-J22 -- 2018 JM
C43Hoyerswerda Obs. in Germany, 2 in MPECs 2018-J22 & 2018-J23 -- 2018 JN, 2018 JM
Q62`Steven M. Tilley in Louisiana via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2018-J22 -- 2018 JM
P93JAXA Space Tracking & Communications Center (JAXA STCC) in Japan, 2 in MPECs 2018-J22 & 2018-J23 -- 2018 JN, 2018 JM
585Kiev Comet Station in Ukraine, 1 in MPEC 2018-J22 -- 2018 JM
950.EURONEAR via La Palma in the Canary Islands, 1 in MPEC 2018-J18 -- 2011 EF15
H01Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2018-J20 -- 2018 JK
711McDonald Obs. in Texas, 16 in MPECs 2018-J18, 2018-J19, 2018-J20, 2018-J21, 2018-J22 & 2018-J23 -- 2018 JN, 2018 JM, 2018 JL, 2018 JK, 2018 JJ, 2018 HJ2, 2018 GS1, 2018 GR2, 2018 GL, 2018 FO5, 2018 EE, 2018 CK14, 2018 CE2, 2017 VO15, 2016 HP6, 2013 LK25
G96Mt. Lemmon Survey (MLS) in Arizona, 16 in MPECs 2018-J18, 2018-J19 & 2018-J20 -- 2018 JK, 2018 JJ, 2018 HO1, 2018 HL2, 2018 GG2, 2018 GA4, 2017 VL15, 2015 TX143, 489900, 474574, 463664, 416801, 37655, 285339, 212359, 152964
K74Muensterschwarzach Obs. in Germany, 3 in MPECs 2018-J18, 2018-J22 & 2018-J23 -- 2018 JN, 2018 JM, 2018 FQ5
C47Nonndorf Obs. in Austria, 3 in MPECs 2018-J21, 2018-J22 & 2018-J23 -- 2018 JN, 2018 JM, 2018 JL
J69North Obs. in England, 2 in MPECs 2018-J22 & 2018-J23 -- 2018 JN, 2018 JM
Z80Northolt Branch Obs. in England, 2 in MPECs 2018-J22 & 2018-J23 -- 2018 JN, 2018 JM
G34Oberfrauendorf Obs. in Germany, 1 in MPEC 2018-J22 -- 2018 JM
C23Olmen Obs. in Belgium, 1 in MPEC 2018-J22 -- 2018 JM
K61Rokycany Obs. in the Czech Republic, 4 in MPECs 2018-J19, 2018-J21, 2018-J22 & 2018-J23 -- 2018 JN, 2018 JM, 2018 JL, 2018 JJ
C95SATINO-1 in France, 1 in MPEC 2018-J18 -- 2017 SO17
W885M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Chile Obs. in Chile, 1 in MPEC 2018-J18 -- 2009 SK104
Y00SONEAR in Brazil, 1 in MPEC 2018-J18 -- 444193
691Spacewatch 0.9m telescope in Arizona, 8 in MPECs 2018-J17, 2018-J18 & 2018-J22 -- 2018 JM, 2018 GQ5, 2018 GL, 2018 DK3, 2018 CZ13, 2015 BL311, 2002 JR100, 517103
291Spacewatch 1.8m telescope in Arizona, 5 in MPEC 2018-J18 -- 2018 GR4, 2018 EE, 2018 BA7, 2017 SG14, 2002 JS2
W34Squirrel Valley Obs. in North Carolina, 2 in MPECs 2018-J18 & 2018-J22 -- 2018 JM, 2015 DP155
I52Steward Obs. Mt. Lemmon Station in Arizona, 5 in MPECs 2018-J19, 2018-J20, 2018-J21, 2018-J22 & 2018-J23 -- 2018 JN, 2018 JM, 2018 JL, 2018 JK, 2018 JJ
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2018-J18 -- 2016 WJ7
L01Visnjan Obs., 4 in MPECs 2018-J19, 2018-J20, 2018-J21 & 2018-J22 -- 2018 JM, 2018 JL, 2018 JK, 2018 JJ
E08Wobblesock Obs. in New South Wales, 3 in MPEC 2018-J18 -- 2018 HM2, 2018 HH2, 2018 GR2
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 7 May '18

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2343 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 JDJPL Sentry15462061-209680.00013754299-4.78-4.780JPL: Computed at 07:01 today Pacific time based on 31 observations spanning 2.7184 days (2018-May-04.40029 to 2018-May-07.118662). Diameter approximately 0.016 km. from weighted mean H=26.68.
2018 HJ2JPL Sentry15462085-208512.709e-04-3.39-3.390JPL: Computed at 06:59 today Pacific time based on 65 observations spanning 13.994 days (2018-Apr-23.41101 to 2018-May-07.40492). Diameter approximately 0.050 km. from weighted mean H=24.16.
2018 GR4JPL Sentry15462048-2116430.00032118486-4.68-5.010JPL: Computed at 07:14 today Pacific time based on 58 observations spanning 22.822 days (2018-Apr-12.31705 to 2018-May-05.13885). Diameter approximately 0.013 km. from weighted mean H=27.05.
2008 GY21NEODyS1546R 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 7 May '18

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

0002 5/8Grabbed MPEC 2018-J19 - 2018 JJ - see above
Grabbed MPEC 2018-J20 - 2018 JK - see above
Grabbed MPEC 2018-J21 - 2018 JL - see above
Grabbed MPEC 2018-J22 - 2018 JM - see above
Grabbed MPEC 2018-J23 - 2018 JN - see above
1821Generated Traffic Report
1546Noted that NEODyS has removed 2008 GY21 as an impact risk - see above
Noted that JPL Sentry has updated its 2018 GR4 risk assessment - see above
Noted that JPL Sentry has updated its 2018 HJ2 risk assessment - see above
Noted that JPL Sentry has updated its 2018 JD risk assessment - see above
Grabbed MPEC 2018-J17 - 2015 BL311 - see above
Grabbed MPEC 2018-J18 - Daily Orbit Update - see above