Contents  on 9 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 9 May '18

Nine objects reported inside ten LD

Nine planetesimals are reported within ten lunar distances (LD) of Earth today. The nearest is inside Earth's sphere of gravitational influence. 2018 JP comes its closest to our planet on this passage, reaching 2.08 LD at 1302 UTC, and gets its closest to the Moon -- 2.36 LD at 1826 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
2.08 LD today 2018 JP 12 m  2.08 LD May 3 - 15 NHATS target, Earth closest at 1302 UTC,
Moon closest 2.36 LD at 1826 UTC - DOU
2.16 LD May 13 2016 HP6 27 m  4.39 from 5.51 LD May 5 - 20 NHATS target - DOU
3.49 LD May 6 2018 JD 16 m  5.76 to 7.29 LD May 1 - 11 risk
4.33 LD May 11 2018 JZ 13 m  5.96 from 8.29 LD yesterday - May 14 NEW - MPEC
4.43 LD May 13 2018 JA1 27 m  6.53 from 7.55 LD May 6 - 20 NEW - MPEC
5.20 LD May 6 2018 JB 22 m  6.43 to 7.68 LD May 2 - 11
6.2   LD yesterday* 2016 JQ5 8 m  6.5 to 7.6 LD May 4 - 11 EPU +/- 14.00 hours*
6.48 LD today 388945 2008 TZ3 282 m  6.48 LD May 5 - 13 Earth closest at 1005 UTC
9.65 LD May 7 1999 FN19 112 m  9.82 to 10.13 LD May 5 - 9 radar/NHATS target, exits ten LD - DOU

This report was generated at 2142 UTC with the discoveries of approaching objects 2018 JY (MPEC) and 2018 JX (MPEC), inbound objects 2018 JA1 (MPEC) and 2018 JZ (MPEC), and already departed 2018 JW (MPEC), which flew by us at 8.97 LD on May 6th. Today's DOU MPEC has additional observation of passing 2018 JP and continuing follow-up for approaching 2018 EJ4, inbound 2016 HP6, outbound 1999 FN19, and departed 2018 HO.

Approaching Traffic - sorted by 10-LD bubble entry date
Earth passage I D ~Size Distance today  Inside ten LD Notes
8.78 LD May 14 2018 JY 51 m  14.21 from 16.17 LD May 12 - 16 NEW - MPEC
3.9   LD May 16* 2018 JX 74 m  18.8 from 21.7 LD May 13 - 19 NEW, EPU +/- 6 mins.* - MPEC
9.50 LD May 29 68347 2001 KB67 371 m  59.38 from 62.56 LD May 28 - 30 radar target
5.56 LD June 10 2018 EJ4 186 m  43.43 from 44.71 LD June 4 - 16 radar/NHATS target - DOU
8.96 LD June 11 2015 DP155 162 m  31.27 from 32.07 LD June 6 - 15 NHATS target
* EPU = Earth passage uncertainty


<< Reading:  The European Southern Observatory has a news item today about finding the first confirmed carbon-rich asteroid in the Kuiper Belt -- 120216 2004 EW95. The science paper with details can be found here (PDF) or here.



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 9 May '18

The MPC's NEO Confirmation Page has 36 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 36 objects listed. Of these, eighteen were "one nighters." So far The Tracking News has counted a total of 49 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 9 May '18

Minor Planet Electronic Circulars

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


MPEC 2018-J34 - "18:33 UT" - 2018 JZ


MPEC 2018-J33 - "18:07 UT" - 2018 JA1


MPEC 2018-J32 - "18:04 UT" - 2018 JY


MPEC 2018-J31 - "18:00 UT" - 2018 JX


MPEC 2018-J30 - "17:57 UT" - 2018 JW


MPEC 2018-J29 - "17:17 UT" - 2001 HX7


<< DOU on 9 May '18 >>  MPEC 2018-J28 - "12:06 UT" - Daily Orbit Update

Observers  on 9 May '18

A total of 34 observers appear in today's MPECs.

CodeObserver / observatory
C97Al-Fulaij Obs., 10 in MPEC 2018-J28 -- 2018 GR2, 475967, 444193, 220839, 152931, 138847, 9856, 5604, 1866, 1627
E23Arcadia Obs. in New South Wales, 2 in MPECs 2018-J32 & 2018-J33 -- 2018 JY, 2018 JA1
H21Astronomical Research Obs. Westfield in Illinois, 4 in MPEC 2018-J28 -- 2018 HO, 2018 HL, 2018 GQ1, 2018 GH1
T05ATLAS Haleakala in Hawaii, 6 in MPECs 2018-J28 & 2018-J32 -- 2018 JY, 85628, 450648, 36183, 5626, 1627
I47Auger Obs. in Argentina, 1 in MPEC 2018-J32 -- 2018 JY
703Catalina Sky Survey (CSS) in Arizona, 18 in MPECs 2018-J28, 2018-J31 & 2018-J33 -- 2018 JX, 2018 JA1, 2018 GR2, 2017 XH62, 2016 HJ19, 2016 CX264, 2015 FP118, 85628, 68348, 66251, 65674, 516803, 36183, 242643, 186822, 154656, 112985, 4581
V06Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) in Arizona, 4 in MPECs 2018-J29, 2018-J30, 2018-J33 & 2018-J34 -- 2018 JZ, 2018 JW, 2018 JA1, 2001 HX7
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2018-J31 -- 2018 JX
K87Dettelbach Vineyard Obs. in Germany, 3 in MPECs 2018-J28, 2018-J30 & 2018-J31 -- 2018 JX, 2018 JW, 2018 JF
K88GINOP-KHK in Hungary, 3 in MPECs 2018-J30, 2018-J31 & 2018-J33 -- 2018 JX, 2018 JW, 2018 JA1
J95Great Shefford Obs. in England, 3 in MPECs 2018-J30, 2018-J31 & 2018-J34 -- 2018 JZ, 2018 JX, 2018 JW
A17Guidestar Obs. in Germany, 6 in MPECs 2018-J28 & 2018-J31 -- 2018 JX, 2018 JC, 2018 JA, 2018 EJ4, 212359, 139345
G48Harlingten Research Obs. in New Mexico, 1 in MPEC 2018-J33 -- 2018 JA1
Q62`Steven M. Tilley in Louisiana via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2018-J33 -- 2018 JA1
P93JAXA Space Tracking & Communications Center (JAXA STCC) in Japan, 2 in MPECs 2018-J31 & 2018-J33 -- 2018 JX, 2018 JA1
H01Magdalena Ridge Obs. (MRO) in New Mexico, 2 in MPECs 2018-J29 & 2018-J32 -- 2018 JY, 2001 HX7
932McCarthy Obs. in Connecticut, 2 in MPECs 2018-J28 & 2018-J33 -- 2018 JA1, 1999 FN19
711McDonald Obs. in Texas, 1 in MPEC 2018-J31 -- 2018 JX
474Mt. John Obs. in New Zealand, 2 in MPECs 2018-J32 & 2018-J33 -- 2018 JY, 2018 JA1
G96Mt. Lemmon Survey (MLS) in Arizona, 24 in MPECs 2018-J28, 2018-J29, 2018-J30, 2018-J31 & 2018-J34 -- 2018 JZ, 2018 JX, 2018 JW, 2018 EM2, 2017 GT5, 2001 HX7, 86666, 516734, 516641, 516454, 514652, 467835, 465892, 459462, 439313, 368949, 335746, 330659, 276770, 276392, 24761, 15745, 155341, 154652
C47Nonndorf Obs. in Austria, 1 in MPEC 2018-J31 -- 2018 JX
J69North Obs. in England, 1 in MPEC 2018-J28 -- 2018 JP
Z80Northolt Branch Obs. in England, 1 in MPEC 2018-J28 -- 2018 BY2
F51Pan-STARRS 1 in Hawaii, 1 in MPEC 2018-J28 -- 2017 YE5
D29Purple Mtn. Obs. Xuyi Station in China, 8 in MPEC 2018-J28 -- 2016 CX264, 2005 JD46, 88254, 507847, 333888, 141531, 6037, 4581
L04ROASTERR-1 in Romania, 1 in MPEC 2018-J28 -- 2016 HP6
K61Rokycany Obs. in the Czech Republic, 1 in MPEC 2018-J31 -- 2018 JX
033Schwarzschild Obs. in Germany, 4 in MPECs 2018-J30, 2018-J31, 2018-J33 & 2018-J34 -- 2018 JZ, 2018 JX, 2018 JW, 2018 JA1
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2018-J31 -- 2018 JX
291Spacewatch 1.8m telescope in Arizona, 3 in MPEC 2018-J28 -- 2018 HQ, 2018 HL, 2018 ED4
I52Steward Obs. Mt. Lemmon Station in Arizona, 10 in MPECs 2018-J28, 2018-J29, 2018-J30, 2018-J31, 2018-J33 & 2018-J34 -- 2018 JZ, 2018 JX, 2018 JW, 2018 JO, 2018 JF, 2018 JA1, 2018 HL2, 2018 GJ1, 2018 EJ4, 2001 HX7
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 4 in MPEC 2018-J28 -- 2018 HJ2, 2018 GW4, 2017 YA8, 2017 MT8
L01Visnjan Obs., 3 in MPECs 2018-J30, 2018-J31 & 2018-J33 -- 2018 JX, 2018 JW, 2018 JA1
198Wildberg Obs. in Germany, 1 in MPEC 2018-J30 -- 2018 JW
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 9 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 JNNEODyS16562088-210941.05e-06-6.32-6.450NEODyS: "Based on 74 optical observations (of which 1 are rejected as outliers) from 2018-05-05.424 to 2018-05-07.991."
2018 HJ2JPL Sentry16562085-208513.633e-04-3.29-3.290JPL: Computed at 07:13 today Pacific time based on 67 observations spanning 15.052 days (2018-Apr-23.41101 to 2018-May-08.462987). Diameter approximately 0.049 km. from weighted mean H=24.20.
2009 VZ39JPL Sentry16562018-21169127.117301e-06-6.20-7.600JPL: Computed at 11:17 April 7th of 2017 Pacific time based on 8 observations spanning .04342 days (2009-Nov-10.27204 to 2009-Nov-10.31546). Diameter approximately 0.009 km. from weighted mean H=27.89.

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 9 May '18

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

2142Generated Traffic Report
1856Grabbed MPEC 2018-J34 - 2018 JZ - see above
1831Grabbed MPEC 2018-J30 - 2018 JW - see above
Grabbed MPEC 2018-J31 - 2018 JX - see above
Grabbed MPEC 2018-J32 - 2018 JY - see above
Grabbed MPEC 2018-J33 - 2018 JA1 - see above
1732Grabbed MPEC 2018-J29 - 2001 HX7 - see above
1656Noted that JPL Sentry has updated its 2009 VZ39 risk assessment - see above
Noted that JPL Sentry has updated its 2018 HJ2 risk assessment - see above
Noted that NEODyS has updated its 2018 JN risk assessment - see above
Grabbed MPEC 2018-J28 - Daily Orbit Update - see above