Contents  on 14 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 14 May '17

Five objects reported inside ten LD

Five minor objects are reported passing within ten lunar distances (LD) of our planet today. The nearest are 2017 JA2, which moves out from 4.10 to 5.94 LD, 2017 JM2, inbound from 6.37 to 5.12 LD, and 2017 HU49, outbound from 5.62 to 5.69 LD.

Earth passage I D ~Size Distance Today  Notes
0.14 LD May 42017 JB2 5 m  6.80 to 7.45 LD intruder, risk
2.57 LD May 122017 JA2 38 m  4.10 to 5.94 LD
3.71 LD May 112017 JX1 21 m  6.37 to 7.89 LD
5.09 LD tomorrow2017 JM2 49 m  5.12 from 6.37 LD DOU
5.55 LD May 112017 HU49 18 m  5.62 to 5.69 LD
Approaching
7.93 LD May 292017 CS 446 m  < 10 LD May 26, radar target - DOU

This report was generated at 1635 UTC with follow-up in today's DOU MPEC for 2017 JM2 and 2017 CS, both in the active traffic table here.

NASA/JPL has a news item telling about analysis of optical, infrared, and radar observations of 2014 JO25's recent passage (links). A short thread ensued on the Minor Planet Mailing list concerned that "once again" there was "no reference to the role played by non-professional astronomers world-wide" in supporting this scientific work.



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 14 May '17

The MPC's NEO Confirmation Page has 22 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 22 objects listed. Of these, thirteen 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 14 May '17

Minor Planet Electronic Circulars

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


MPEC 2017-J74 - "15:08 UT" - 2017 JW2


MPEC 2017-J73 - "15:03 UT" - 2017 JV2


MPEC 2017-J72 - "14:58 UT" - 2017 JU2


MPEC 2017-J71 - "14:52 UT" - 2017 JT2


<< DOU on 14 May '17 >>  MPEC 2017-J70 - "12:05 UT" - Daily Orbit Update

Observers  on 14 May '17

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

CodeObserver / observatory
705"Kristie Nault via Apache Point Obs. in New Mexico, 15 in MPECs 2017-J70 & 2017-J74 -- 2017 JZ1, 2017 JW2, 2017 JW1, 2017 JU1, 2017 JT1, 2017 JK2, 2017 HZ49, 2017 HY50, 2017 HN3, 2017 HH2, 2017 FD65, 2016 TA56, 2009 WC52, 1996 VB3, 469727
H21Astronomical Research Obs. Westfield in Illinois, 16 in MPECs 2017-J70, 2017-J73 & 2017-J74 -- 2017 JW2, 2017 JV2, 2017 JS1, 2017 HZ4, 2017 HA1, 2017 FW64, 2017 FR2, 2017 FH90, 2016 YF11, 2016 JP, 2014 NZ64, 276049, 222073, 163696, 11398, 4596
T08ATLAS Mauna Loa in Hawaii, 10 in MPEC 2017-J70 -- 2014 KF91, 484795, 475665, 427643, 190166, 175189, 7341, 4954, 3199, 1864
160Castelmartini Obs. in Italy, 6 in MPEC 2017-J70 -- 53319, 488803, 427643, 395289, 137170, 7888
703Catalina Sky Survey (CSS) in Arizona, 5 in MPEC 2017-J70 -- 2017 CS, 2014 KF91, 484795, 276468, 4954
107Cavezzo Obs. in Italy, 4 in MPEC 2017-J70 -- 222073, 163696, 11398, 2329
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 2 in MPECs 2017-J71 & 2017-J72 -- 2017 JU2, 2017 JT2
734Farpoint Obs. in Kansas, 1 in MPEC 2017-J74 -- 2017 JW2
J95Great Shefford Obs. in England, 2 in MPECs 2017-J73 & 2017-J74 -- 2017 JW2, 2017 JV2
C43Hoyerswerda Obs. in Germany, 1 in MPEC 2017-J73 -- 2017 JV2
Q62|Sergio Foglia in Italy via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2017-J72 -- 2017 JU2
W86LCOGT Cerro Tololo B in Chile, 2 in MPECs 2017-J71 & 2017-J72 -- 2017 JU2, 2017 JT2
H01Magdalena Ridge Obs. (MRO) in New Mexico, 2 in MPECs 2017-J71 & 2017-J72 -- 2017 JU2, 2017 JT2
118Modra Obs. in Slovakia, 2 in MPECs 2017-J70 & 2017-J73 -- 2017 JV2, 2329
G96Mt. Lemmon Survey (MLS) in Arizona, 10 in MPECs 2017-J70, 2017-J73 & 2017-J74 -- 2017 JW2, 2017 JV2, 2016 XH2, 2016 HJ19, 2014 GD45, 276468, 265032, 215588, 138095, 136897
C47Nonndorf Obs. in Austria, 1 in MPEC 2017-J73 -- 2017 JV2
Z80Northolt Branch Obs. in England, 1 in MPEC 2017-J70 -- 11398
F51Pan-STARRS 1 (PS1) in Hawaii, 2 in MPECs 2017-J71 & 2017-J72 -- 2017 JU2, 2017 JT2
D29Purple Mtn. Obs. Xuyi Station in China, 1 in MPEC 2017-J70 -- 190166
W25RMS Obs., 9 in MPECs 2017-J70, 2017-J73 & 2017-J74 -- 2017 JW2, 2017 JV2, 2017 JM2, 1996 VB3, 276468, 260141, 20255, 159560, 5879
H36Sandlot Obs. in Kansas, 1 in MPEC 2017-J70 -- 2017 JU1
204Schiaparelli Obs. in Italy, 2 in MPECs 2017-J73 & 2017-J74 -- 2017 JW2, 2017 JV2
I52Steward Obs. Mt. Lemmon Station in Arizona, 7 in MPECs 2017-J70, 2017-J73 & 2017-J74 -- 2017 JW2, 2017 JV2, 2017 JM2, 2017 HY49, 2017 HE4, 2017 GQ6, 467460
926Tenagra II Obs. in Arizona, 5 in MPECs 2017-J70, 2017-J72 & 2017-J73 -- 2017 JV2, 2017 JU2, 2016 LJ49, 2012 VO76, 2011 JX1
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2017-J70 -- 2017 FO128
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 14 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 JX1NEODyS1616R E M O V E D-
2017 HZ4JPL Sentry15162073-2113226.4037998e-05-5.00-5.080JPL: Computed at 08:13 today Pacific time based on 35 observations spanning 16.660 days (2017-Apr-26.44436 to 2017-May-13.1042). Diameter approximately 0.022 km. from weighted mean H=25.96.
2017 FO128NEODyS1616210931.17e-10-8.87-9.110NEODyS: "Based on 104 optical observations (of which 2 are rejected as outliers) from 2017-03-30.263 to 2017-05-02.354."

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 14 May '17

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

1635Generated Traffic Report
1616Noted that NEODyS has updated its 2017 FO128 risk assessment - see above
Noted that NEODyS has removed 2017 JX1 as an impact risk - see above
1516Noted that JPL Sentry has updated its 2017 HZ4 risk assessment - see above
Grabbed MPEC 2017-J70 - Daily Orbit Update - see above
Grabbed MPEC 2017-J71 - 2017 JT2 - see above
Grabbed MPEC 2017-J72 - 2017 JU2 - see above
Grabbed MPEC 2017-J73 - 2017 JV2 - see above
Grabbed MPEC 2017-J74 - 2017 JW2 - see above