Contents  on 10 May '17

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 10 May '17

Seven objects reported inside ten LD

There are seven minor planets known to be inside ten lunar distances (LD) of Earth today. Closest are 2017 JV1, which heads away from 3.67 to 5.85 LD, and risk-listed 2017 JX1, inbound from 4.22 to 3.71 LD, while newly announced risk-listed intruder 2017 JB2 is outbound from 4.14 to 4.81 LD.

Earth passage I D ~Size Distance Today  Notes
0.14 LD May 42017 JB2 5 m  4.14 to 4.81 LD NEW, intruder, risk - MPEC
2.34 LD May 82017 JV1 20 m  3.67 to 5.85 LD
2.57 LD May 122017 JA2 40 m  4.17 from 6.01 LD DOU
3.70 LD May 82017 HX4 18 m  5.47 to 7.66 LD
3.71 LD tomorrow2017 JX1 21 m  3.71 from 4.22 LD risk - DOU
5.55 LD tomorrow2017 HU49 18 m  5.57 from 5.61 LD
8.88 LD yesterday2017 JY1 31 m  8.93 to 9.31 LD
Approaching
5.09 LD May 152017 JM2 50 m  < 10 LD May 12, NEW - MPEC
7.93 LD May 292017 CS 446 m  < 10 LD May 26, radar target - DOU

This report was generated at 1824 UTC with three discoveries, two shown here in the active traffic table plus already departed 2017 JP2 (MPEC), which passed us at 9.12 LD on May 3rd. Today's DOU MPEC has follow-up for three objects, all in the table here.



Notes: Ten times the distance to the Moon (ten LD) has no astronomical importance but is a useful boundary for reporting on transient natural objects that approach the actually significant 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 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 10 May '17

The MPC's NEO Confirmation Page has 24 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 24 objects listed. Of these, eleven were "one nighters." So far The Tracking News has counted a total of 39 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 10 May '17

Minor Planet Electronic Circulars

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


<< DOU on 10 May '17 >>  MPEC 2017-J65 - "12:10 UT" - Daily Orbit Update


MPEC 2017-J64 - "11:51 UT" - 2017 JO2


MPEC 2017-J63 - "11:48 UT" - 2017 JN2


MPEC 2017-J62 - "11:45 UT" - 2017 JP2


MPEC 2017-J61 - "11:42 UT" - 2017 JM2


MPEC 2017-J60 - "11:39 UT" - 2017 JL2


MPEC 2017-J59 - "11:36 UT" - 2017 JK2


MPEC 2017-J58 - "11:32 UT" - 2017 JJ2


MPEC 2017-J57 - "10:46 UT" - 2017 JB2

Observers  on 10 May '17

A total of 29 observers appear in today's MPECs.

CodeObserver / observatory
705"Kristie Nault via Apache Point Obs. in New Mexico, 1 in MPEC 2017-J58 -- 2017 JJ2
H21Astronomical Research Obs. Westfield in Illinois, 16 in MPECs 2017-J57, 2017-J60, 2017-J61, 2017-J62, 2017-J63, 2017-J64 & 2017-J65 -- 2017 JP2, 2017 JO2, 2017 JN2, 2017 JM2, 2017 JL2, 2017 JB2, 2017 CS, 2017 AC5, 2016 JP, 252091, 163696, 136582, 11398, 5653, 3352, 2329
C77Bernezzo Obs. in Italy, 1 in MPEC 2017-J62 -- 2017 JP2
160Castelmartini Obs. in Italy, 3 in MPECs 2017-J61, 2017-J62 & 2017-J65 -- 2017 JP2, 2017 JM2, 2017 JA2
703Catalina Sky Survey (CSS) in Arizona, 2 in MPECs 2017-J57 & 2017-J62 -- 2017 JP2, 2017 JB2
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2017-J60 -- 2017 JL2
734Farpoint Obs. in Kansas, 1 in MPEC 2017-J65 -- 2017 JA2
203GiaGa Obs. in Italy, 1 in MPEC 2017-J65 -- 2017 JA2
J95Great Shefford Obs. in England, 4 in MPECs 2017-J57, 2017-J61, 2017-J62 & 2017-J65 -- 2017 JP2, 2017 JM2, 2017 JB2, 2017 JA2
H06iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2017-J65 -- 2017 JA2
Q62|Sergio Foglia in Italy via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2017-J65 -- 1980
W86LCOGT Cerro Tololo B in Chile, 1 in MPEC 2017-J64 -- 2017 JO2
K92LCOGT Sutherland B in South Africa, 1 in MPEC 2017-J64 -- 2017 JO2
H01Magdalena Ridge Obs. (MRO) in New Mexico, 4 in MPECs 2017-J59, 2017-J60, 2017-J61 & 2017-J63 -- 2017 JN2, 2017 JM2, 2017 JL2, 2017 JK2
G96Mt. Lemmon Survey (MLS) in Arizona, 6 in MPECs 2017-J57, 2017-J58, 2017-J59, 2017-J61, 2017-J62 & 2017-J63 -- 2017 JP2, 2017 JN2, 2017 JM2, 2017 JK2, 2017 JJ2, 2017 JB2
J69North Obs. in England, 2 in MPEC 2017-J65 -- 2017 JX1, 2017 JA2
Z80Northolt Branch Obs. in England, 1 in MPEC 2017-J65 -- 2017 JA2
F51Pan-STARRS 1 (PS1) in Hawaii, 14 in MPECs 2017-J59, 2017-J60, 2017-J61, 2017-J64 & 2017-J65 -- 2017 JO2, 2017 JM2, 2017 JL2, 2017 JK2, 96631, 87024, 480004, 405427, 252793, 142561, 141447, 136818, 10636, 5604
W25RMS Obs., 1 in MPEC 2017-J62 -- 2017 JP2
H36Sandlot Obs. in Kansas, 2 in MPECs 2017-J59 & 2017-J65 -- 2017 JK2, 2017 JA2
204Schiaparelli Obs. in Italy, 2 in MPECs 2017-J61 & 2017-J62 -- 2017 JP2, 2017 JM2
587Sormano Obs. in Italy, 2 in MPECs 2017-J61 & 2017-J62 -- 2017 JP2, 2017 JM2
291Spacewatch 1.8m telescope in Arizona, 2 in MPECs 2017-J60 & 2017-J64 -- 2017 JO2, 2017 JL2
W34Squirrel Valley Obs. in North Carolina, 1 in MPEC 2017-J65 -- 2017 CS
I52Steward Obs. Mt. Lemmon Station in Arizona, 6 in MPECs 2017-J57, 2017-J58, 2017-J59, 2017-J61, 2017-J62 & 2017-J63 -- 2017 JP2, 2017 JN2, 2017 JM2, 2017 JK2, 2017 JJ2, 2017 JB2
926Tenagra II Obs. in Arizona, 3 in MPECs 2017-J58, 2017-J61 & 2017-J62 -- 2017 JP2, 2017 JM2, 2017 JJ2
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2017-J65 -- 2017 EH
K41Vegaquattro Obs. in Italy, 1 in MPEC 2017-J62 -- 2017 JP2
718Wiggins Obs. in Utah, 1 in MPEC 2017-J65 -- 2017 JA2
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 10 May '17

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
2017 JB2JPL Sentry16062110-211126.743e-07-8.61-8.890JPL: Computed at 07:04 today Pacific time based on 27 observations spanning 3.6689 days (2017-May-06.44444 to 2017-May-10.11339). Diameter approximately 0.005 km. from weighted mean H=29.03.
NEODyS16062100-210221.16e-08-10.33-10.350NEODyS: "Based on 27 optical observations (of which 0 are rejected as outliers) from 2017-05-06.445 to 2017-05-10.114."
2017 JX1JPL Sentry1606R E M O V E DJPL: Risk listing removed at 1449 UTC today.
NEODyS1606209112.01e-06-6.43-6.430NEODyS: "Based on 70 optical observations (of which 4 are rejected as outliers) from 2017-05-04.136 to 2017-05-08.117."
2014 HG196JPL Sentry16062018-21173339.800391e-07-6.43-7.440JPL: Computed at 21:29 April 8th Pacific time based on 18 observations spanning 1.0300 days (2014-Apr-23.08628 to 2014-Apr-24.11626). Diameter approximately 0.016 km. from weighted mean H=26.56.

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 10 May '17

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

1824Generated Traffic Report
1606Noted that JPL Sentry has updated its 2014 HG196 risk assessment - see above
Noted that JPL Sentry has posted 2017 JB2 as an impact risk - see above
Noted that NEODyS has posted 2017 JB2 as an impact risk - see above
Noted that JPL Sentry has removed 2017 JX1 as an impact risk - see above
Noted that NEODyS has posted 2017 JX1 as an impact risk - see above
Grabbed MPEC 2017-J57 - 2017 JB2 - see above
Grabbed MPEC 2017-J58 - 2017 JJ2 - see above
Grabbed MPEC 2017-J59 - 2017 JK2 - see above
Grabbed MPEC 2017-J60 - 2017 JL2 - see above
Grabbed MPEC 2017-J61 - 2017 JM2 - see above
Grabbed MPEC 2017-J62 - 2017 JP2 - see above
Grabbed MPEC 2017-J63 - 2017 JN2 - see above
Grabbed MPEC 2017-J64 - 2017 JO2 - see above
Grabbed MPEC 2017-J65 - Daily Orbit Update - see above