Contents  on 6 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 6 May '18

Six objects reported inside ten LD

Six visitors are reported less than ten lunar distances (LD) from our home world today. Nearest is newly announced and risk-listed 2018 JD, which comes its closest to Earth this time around, reaching 3.49 LD at 1137 UTC.

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  7.87 from 9.08 LD yesterday - May 20 NHATS target - MPEC
3.49 LD today 2018 JD 16 m  3.49 LD May 1 - 11 NEW, Earth closest at 1137 UTC, risk - MPEC, DOU
5.20 LD today 2018 JB 21 m  5.20 LD May 2 - 11 NEW, Earth closest at 2320 UTC - MPEC, DOU
6.2   LD May 8* 2016 JQ5 8 m  6.8 from 8.1 LD May 4 - 11 Earth passage uncertainty +/- 14.00 hours*
6.48 LD May 9 388945 2008 TZ3 282 m  8.13 from 9.50 LD yesterday - May 13 DOU
9.65 LD tomorrow 1999 FN19 112 m  9.68 from 9.86 LD yesterday - May 9 radar/NHATS target - DOU

This report was generated at 1950 UTC with the recovery of unexpected inbound 2016 HP6 (MPEC) and the discoveries of passing objects 2018 JB (MPEC, DOU) and risk-listed 2018 JD (MPEC, DOU). Today's DOU MPEC has follow-up for inbound objects 388945 2008 TZ3 and 1999 FN19, departed 2018 GE2, and distant 2002 JR100 (first follow-up to its recovery), plus astrometry from last month for now departed objects 2018 HY1, 2018 HX1, and 2018 HL1 as well as approaching 2015 DP155.

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  69.00 from 72.27 LD May 28 - 30 radar target
5.56 LD June 10 2018 EJ4 186 m  47.25 from 48.52 LD June 4 - 16 radar/NHATS target
8.96 LD June 11 2015 DP155 162 m  33.64 from 34.42 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 an object that has come within ten LD since A/CC began these traffic reports (2007) but is not now 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 6 May '18

The MPC's NEO Confirmation Page has 12 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had twelve objects listed. Of these, four were "one nighters." So far The Tracking News has counted a total of 20 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 6 May '18

Minor Planet Electronic Circulars

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


MPEC 2018-J16 - "19:47 UT" - 2010 MS1


MPEC 2018-J15 - "17:14 UT" - 2018 JF


MPEC 2018-J14 - "17:11 UT" - 2018 JE


<< DOU on 6 May '18 >>  MPEC 2018-J13 - "12:04 UT" - Daily Orbit Update


MPEC 2018-J12 - "01:27 UT" - 2016 HP6


MPEC 2018-J11 - "00:49 UT" - 2018 JC


MPEC 2018-J10 - "00:46 UT" - 2018 JB


MPEC 2018-J09 - "00:43 UT" - 2018 JD


MPEC 2018-J08 - "00:39 UT" - 2018 JA


MPEC 2018-J07 - "00:36 UT" - 2018 HS3


MPEC 2018-J06 - "00:33 UT" - 2018 HR3

Observers  on 6 May '18

A total of 32 observers appear in today's MPECs.

CodeObserver / observatory
K40Altdorf Obs. in Germany, 1 in MPEC 2018-J13 -- 388945
E23Arcadia Obs. in New South Wales, 1 in MPEC 2018-J12 -- 2016 HP6
H21Astronomical Research Obs. Westfield in Illinois, 11 in MPECs 2018-J07 & 2018-J13 -- 2018 HS3, 2018 HL, 2018 GW3, 2018 GJ5, 2018 GE4, 2018 FY, 2018 FF1, 2018 FC1, 2018 EE4, 2016 JQ17, 2010 GC35
T05ATLAS Haleakala in Hawaii, 5 in MPEC 2018-J13 -- 2018 FV4, 475967, 337084, 138847, 9856
621Bergisch Gladbach Obs. in Germany, 1 in MPEC 2018-J08 -- 2018 JA
703Catalina Sky Survey (CSS) in Arizona, 23 in MPECs 2018-J08, 2018-J11, 2018-J12, 2018-J13 & 2018-J14 -- 2018 JE, 2018 JC, 2018 JA, 2018 GR2, 2018 GL1, 2018 BY2, 2016 HP6, 2015 JP, 96315, 85628, 66251, 497117, 450648, 374851, 36183, 337084, 24445, 163243, 162038, 159533, 152637, 136618, 1627
V06Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) in Arizona, 12 in MPEC 2018-J13 -- 2018 HL, 2018 GQ5, 2018 GP5, 2018 GE5, 2018 GB4, 2018 GA5, 2018 FK29, 2018 DB2, 2017 WH14, 2015 GJ, 2013 LH16, 2012 GS5
309'Martin Altmann in Germany via Cerro Paranal in Chile, 1 in MPEC 2018-J06 -- 2018 HR3
K87Dettelbach Vineyard Obs. in Germany, 6 in MPECs 2018-J08, 2018-J11, 2018-J12, 2018-J13, 2018-J14 & 2018-J15 -- 2018 JF, 2018 JE, 2018 JC, 2018 JA, 2016 HP6, 2002 JR100
734Farpoint Obs. in Kansas, 7 in MPECs 2018-J07, 2018-J08, 2018-J09, 2018-J10, 2018-J11, 2018-J14 & 2018-J15 -- 2018 JF, 2018 JE, 2018 JD, 2018 JC, 2018 JB, 2018 JA, 2018 HS3
K88GINOP-KHK in Hungary, 4 in MPECs 2018-J08, 2018-J11, 2018-J14 & 2018-J15 -- 2018 JF, 2018 JE, 2018 JC, 2018 JA
J95Great Shefford Obs. in England, 6 in MPECs 2018-J08, 2018-J09, 2018-J10, 2018-J11, 2018-J13, 2018-J14 & 2018-J15 -- 2018 JF, 2018 JE, 2018 JD, 2018 JC, 2018 JB, 2018 JA
A17Guidestar Obs. in Germany, 5 in MPECs 2018-J08, 2018-J11 & 2018-J13 -- 2018 JC, 2018 JA, 2018 GA5, 2002 ON4, 2002 JR100
G48Harlingten Research Obs. in New Mexico, 2 in MPEC 2018-J13 -- 2018 BY2, 2016 JP
H15ISON New Mexico Obs. in New Mexico, 1 in MPEC 2018-J13 -- 450648
P93JAXA Space Tracking & Communications Center (JAXA STCC) in Japan, 4 in MPECs 2018-J08, 2018-J11, 2018-J12 & 2018-J14 -- 2018 JE, 2018 JC, 2018 JA, 2016 HP6
950.EURONEAR via La Palma in the Canary Islands, 1 in MPEC 2018-J13 -- 2018 FP3
H01Magdalena Ridge Obs. (MRO) in New Mexico, 4 in MPECs 2018-J06, 2018-J07 & 2018-J13 -- 2018 JD, 2018 HS3, 2018 HR3, 2018 HJ2
711McDonald Obs. in Texas, 13 in MPECs 2018-J07, 2018-J08, 2018-J11, 2018-J13, 2018-J14 & 2018-J15 -- 2018 JF, 2018 JE, 2018 JC, 2018 JA, 2018 HV2, 2018 HS3, 2018 HO1, 2018 HK, 2018 HA1, 2018 GP5, 2018 GA5, 2018 FD3, 2018 AZ
G96Mt. Lemmon Survey (MLS) in Arizona, 15 in MPECs 2018-J07, 2018-J09, 2018-J10, 2018-J13, 2018-J15 & 2018-J16 -- 2018 JF, 2018 JD, 2018 JB, 2018 HS3, 2018 HL2, 2018 GL1, 2018 GA5, 2017 WH14, 2017 BD29, 2010 MS1, 2007 EM, 516435, 463664, 27346, 115052
C47Nonndorf Obs. in Austria, 2 in MPECs 2018-J11 & 2018-J13 -- 2018 JC, 388945
Z80Northolt Branch Obs. in England, 3 in MPEC 2018-J13 -- 2018 BY2, 2016 JP, 1999 FN19
G34Oberfrauendorf Obs. in Germany, 2 in MPEC 2018-J13 -- 388945, 9856
I41Palomar Transient Factory in southern California, 1 in MPEC 2018-J13 -- 474574
L04ROASTERR-1 in Romania, 1 in MPEC 2018-J08 -- 2018 JA
204Schiaparelli Obs. in Italy, 14 in MPEC 2018-J13 -- 2018 HY1, 2018 HX1, 2018 HP, 2018 HL1, 2018 GY1, 2018 GL, 2018 GJ5, 2018 GH5, 2018 GB5, 2016 JP, 2015 TX143, 2015 DP155, 2001 SC170, 516457
Y00SONEAR in Brazil, 4 in MPEC 2018-J13 -- 2018 FQ5, 2013 US3, 450648, 388945
691Spacewatch 0.9m telescope in Arizona, 6 in MPECs 2018-J11 & 2018-J13 -- 2018 JC, 2018 EQ4, 2018 DK3, 2005 JD46, 517103, 498548
291Spacewatch 1.8m telescope in Arizona, 2 in MPECs 2018-J06 & 2018-J13 -- 2018 HR3, 2018 GE2
I52Steward Obs. Mt. Lemmon Station in Arizona, 5 in MPECs 2018-J07, 2018-J09, 2018-J11, 2018-J14 & 2018-J15 -- 2018 JF, 2018 JE, 2018 JD, 2018 JC, 2018 HS3
673!Jana Pittichova Chesley via Table Mtn. Obs. in southern California, 4 in MPECs 2018-J07, 2018-J11, 2018-J14 & 2018-J15 -- 2018 JF, 2018 JE, 2018 JC, 2018 HS3
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2018-J13 -- 2016 QF45
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 6 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 JDNEODyS22332061-2118371.04e-04-4.91-4.99-NEODyS #2 for the day: "Based on 28 optical observations (of which 0 are rejected as outliers) from 2018-05-04.401 to 2018-05-06.461."
JPL Sentry16152061-209688.618488e-05-4.97-4.980JPL #2 for the day: Computed at 07:43 today Pacific time based on 28 observations spanning 2.0604 days (2018-May-04.40029 to 2018-May-06.460682). Diameter approximately 0.016 km. from weighted mean H=26.65.
2018 HJ2NEODyS2233208511.32e-05-4.72-4.720NEODyS #2 for the day: "Based on 62 optical observations (of which 0 are rejected as outliers) from 2018-04-23.412 to 2018-05-06.452."
JPL Sentry16152085-208512.644e-04-3.41-3.410JPL: Computed at 07:35 today Pacific time based on 62 observations spanning 13.040 days (2018-Apr-23.41101 to 2018-May-06.450942). Diameter approximately 0.050 km. from weighted mean H=24.16.
2018 GR4NEODyS16152048-21161891.41e-04-5.02-5.240NEODyS: "Based on 57 optical observations (of which 1 are rejected as outliers) from 2018-04-12.318 to 2018-04-24.167."
2018 GE2NEODyS22332054-21172385.35e-05-5.54-6.270NEODyS: "Based on 103 optical observations (of which 4 are rejected as outliers) from 2018-04-10.411 to 2018-05-06.269."
JPL Sentry16152054-2115776.1364747e-05-5.46-6.050JPL: Computed at 07:33 today Pacific time based on 102 observations spanning 25.858 days (2018-Apr-10.40973 to 2018-May-06.26813). Diameter approximately 0.013 km. from weighted mean H=27.02.
2017 BW30NEODyS0022R 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 6 May '18

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

2233Noted that NEODyS has updated its 2018 GE2 risk assessment - see above
Noted that NEODyS has updated its 2018 HJ2 risk assessment - see above
Noted that NEODyS has updated its 2018 JD risk assessment - see above
2034Grabbed MPEC 2018-J16 - 2010 MS1 - see above
1950Generated Traffic Report
1738Grabbed MPEC 2018-J14 - 2018 JE - see above
Grabbed MPEC 2018-J15 - 2018 JF - see above
1615Noted that JPL Sentry has updated its 2018 GE2 risk assessment - see above
Noted that NEODyS 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
Noted that NEODyS has posted 2018 JD as an impact risk - see above
Grabbed MPEC 2018-J13 - Daily Orbit Update - see above
0548Noted that JPL Sentry has posted 2018 JD as an impact risk - see above
Grabbed MPEC 2018-J06 - 2018 HR3 - see above
Grabbed MPEC 2018-J07 - 2018 HS3 - see above
Grabbed MPEC 2018-J08 - 2018 JA - see above
Grabbed MPEC 2018-J09 - 2018 JD - see above
Grabbed MPEC 2018-J10 - 2018 JB - see above
Grabbed MPEC 2018-J11 - 2018 JC - see above
Grabbed MPEC 2018-J12 - 2016 HP6 - see above
0022Noted that NEODyS has removed 2017 BW30 as an impact risk - see above
Noted that NEODyS has updated its 2018 HJ2 risk assessment - see above