Contents  on 31 March '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 31 March '17

Twelve objects reported inside ten LD

Twelve Solar-System small bodies are known to be within ten lunar distances (LD) of our planet today. Risk-listed NHATS target 2017 FT102 spends its day inside Earth's SOI (sphere of gravitational influence), inbound from 2.17 to 1.74 LD, while intruder 2017 FJ101 exits the SOI, outbound from 1.90 to 4.31 LD.

Earth passage I D ~Size Distance Today  Notes
0.85 LD yesterday2017 FJ101 7 m  1.90 to 4.31 LD exits Earth SOI, intruder
1.05 LD April 32017 FT102 5 m  1.74 from 2.17 LD NHATS target, risk, inside Earth SOI - DOU
1.35 LD March 292017 FY101 12 m  3.51 to 5.89 LD NHATS target
2.05 LD April 32017 FQ127 21 m  8.77 from 11.91 LD NEW, enters ten LD - MPEC
2.37 LD April 12017 FX90 18 m  3.27 from 5.53 LD risk - DOU
2.57 LD March 222017 FJ3 4 m  4.66 to 5.06 LD NHATS target
3.51 LD March 222017 FW90 8 m  8.72 to 9.62 LD NHATS target, risk
3.54 LD March 292017 FR91 14 m  4.31 to 5.79 LD NHATS target - DOU
5.75 LD March 272017 FF3 15 m  6.25 to 6.52 LD NHATS target
7.63 LD March 262015 TC25 4 m  8.31 to 8.64 LD radar/NHATS target, risk
8.99 LD April 22017 FV 47 m  9.71 from 11.29 LD enters ten LD, radar target, risk - DOU

This report was generated at 1945 UTC with the discoveries of 2017 FQ127 (MPEC) and already departed 2017 FP127 (MPEC), which flew past us at 6.13 LD on March 22nd. Today's DOU MPEC has follow-up for eight objects listed in the traffic tables here as well as for seven departed objects: 2017 FT101, 2017 FL101, 2017 FU90, risk-listed 2017 FB102, and NHATS targets 2017 FS91, 2017 FR63, and 2017 FQ63, plus astrometry from last April for NHATS target 2009 DL46, which was also a radar target at the time.

Approaching (sorted by 10-LD bubble entry date)
7.03 LD April 42017 FM101 16 m  < 10 LD April 1, NHATS target - DOU
7.67 LD April 72017 FS102 14 m  < 10 LD April 3, risk
3.74 LD April 62017 FU64 59 m  < 10 LD April 4 - DOU
9.90 LD April 52017 FX101 30 m  < 10 LD April 4, NHATS target - DOU
4.57 LD April 192014 JO25 812 m  < 10 LD April 18, radar target
7.93 LD May 292017 CS 446 m  < 10 LD May 26, radar target - DOU



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 31 March '17

The MPC's NEO Confirmation Page has 67 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 67 objects listed. Of these, nineteen were "one nighters." So far The Tracking News has counted a total of 79 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 31 March '17

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 2017-F217 - "16:40 UT" - 2017 FQ127


MPEC 2017-F216 - "16:36 UT" - 2017 FP127


MPEC 2017-F215 - "16:32 UT" - 2017 FO127


MPEC 2017-F214 - "16:29 UT" - 2017 FN127


MPEC 2017-F213 - "16:25 UT" - 2017 FM127


MPEC 2017-F212 - "16:22 UT" - 2017 FL127


<< DOU on 31 Mar. '17 >>  MPEC 2017-F211 - "12:06 UT" - Daily Orbit Update

Observers  on 31 March '17

A total of 31 observers appear in today's MPECs.

CodeObserver / observatory
T05ATLAS Haleakala in Hawaii, 2 in MPEC 2017-F211 -- 11398, 3103
T08ATLAS Mauna Loa in Hawaii, 16 in MPEC 2017-F211 -- 90075, 405427, 388838, 370307, 252091, 175189, 143404, 138155, 7341, 5626, 5604, 4954, 4055, 2329, 1864, 1036
160Castelmartini Obs. in Italy, 6 in MPEC 2017-F211 -- 2010 TF54, 53319, 475665, 427643, 141018, 137170
703Catalina Sky Survey (CSS) in Arizona, 10 in MPEC 2017-F211 -- 2017 AC5, 2002 FQ4, 484795, 40267, 317255, 163696, 142561, 138359, 138155, 10636
K79Erfurt Obs., 1 in MPEC 2017-F211 -- 5604
K73Gravina Obs. in Italy, 2 in MPEC 2017-F211 -- 143404, 11398
695^Spacewatch via Kitt Peak Natl. Obs. (KPNO) in Arizona, 18 in MPEC 2017-F211 -- 2016 HF19, 2016 BZ14, 2016 AO66, 2016 AL8, 2015 XR128, 2015 WC13, 2015 PP291, 2015 PM57, 2015 HA1, 2011 WC, 2009 DL46, 2008 XW2, 2005 FC3, 85990, 468727, 467352, 465749, 453729
K92LCOGT Sutherland B in South Africa, 1 in MPEC 2017-F211 -- 2009 HG
K38M57 Obs. in Italy, 1 in MPEC 2017-F211 -- 2017 FU64
Z22MASTER IAC Obs. in the Canary Islands, 1 in MPEC 2017-F211 -- 4503
K95MASTER-II Sutherland in South Africa, 1 in MPEC 2017-F211 -- 5626
568_Marco Micheli on Mauna Kea in Hawaii, 4 in MPECs 2017-F211, 2017-F213, 2017-F214 & 2017-F215 -- 2017 FO127, 2017 FN127, 2017 FM127, 2009 HG
B67Mirasteilas Obs. in Switzerland, 4 in MPEC 2017-F211 -- 2017 DS35, 2013 RM43, 2006 UM, 2002 FQ4
108Montelupo Obs. in Italy, 3 in MPEC 2017-F211 -- 370307, 22771, 4954
474Mt. John Obs. in New Zealand, 12 in MPEC 2017-F211 -- 2017 FT90, 2017 FT, 2017 FP102, 2017 FO102, 2017 FN91, 2017 FN63, 2017 FK101, 2017 FJ1, 2017 FF90, 2017 FD101, 2017 CG1, 2017 BC30
G96Mt. Lemmon Survey (MLS) in Arizona, 22 in MPECs 2017-F211, 2017-F216 & 2017-F217 -- 2017 FU64, 2017 FT101, 2017 FS91, 2017 FQ64, 2017 FQ63, 2017 FQ127, 2017 FP127, 2017 FL90, 2017 DS35, 2016 WF9, 2010 DP, 1996 FS1, 85275, 485051, 483459, 481904, 34613, 328059, 275611, 241662, 154652, 4179
G34Oberfrauendorf Obs. in Germany, 1 in MPEC 2017-F211 -- 143404
F51Pan-STARRS 1 (PS1) in Hawaii, 15 in MPECs 2017-F211, 2017-F213, 2017-F214 & 2017-F215 -- 2017 FR63, 2017 FO127, 2017 FN127, 2017 FM127, 2017 FL91, 2017 EU, 2016 QC84, 2014 MK27, 2011 QP96, 483408, 339492, 144411, 137158, 7480, 7474
K63Pascoli Obs. in Italy, 1 in MPEC 2017-F217 -- 2017 FQ127
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 17 in MPEC 2017-F211 -- 2017 FX90, 2017 FU64, 2017 FE101, 2017 EN, 2017 DT37, 2017 DC38, 2017 CS, 2017 AC5, 2016 DP, 2013 RM43, 2010 UD, 2006 UM, 2006 EC1, 1998 HK1, 90075, 11398, 5604
W98Polonia Obs. in Chile, 1 in MPEC 2017-F211 -- 4055
W25RMS Obs., 4 in MPEC 2017-F211 -- 2017 AC5, 370702, 154652, 138155
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2017-F216 -- 2017 FP127
033Schwarzschild Obs. in Germany, 1 in MPEC 2017-F217 -- 2017 FQ127
G40#J.L. Tuten in Arkansas via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2017-F211 -- 2017 FU64
691Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2017-F211 -- 2017 CH1, 5626
291Spacewatch 1.8m telescope in Arizona, 4 in MPECs 2017-F211, 2017-F212, 2017-F213 & 2017-F214 -- 2017 FU64, 2017 FN127, 2017 FM127, 2017 FL127
I52Steward Obs. Mt. Lemmon Station in Arizona, 39 in MPECs 2017-F211 & 2017-F217 -- 2017 FY90, 2017 FY64, 2017 FX101, 2017 FW101, 2017 FV101, 2017 FV, 2017 FU90, 2017 FT102, 2017 FT101, 2017 FS91, 2017 FR63, 2017 FR101, 2017 FQ91, 2017 FQ63, 2017 FQ127, 2017 FQ101, 2017 FQ, 2017 FP91, 2017 FP101, 2017 FO91, 2017 FN64, 2017 FM91, 2017 FM90, 2017 FM101, 2017 FL90, 2017 FL101, 2017 FK63, 2017 FK101, 2017 FH90, 2017 FH3, 2017 FH, 2017 FG101, 2017 FF90, 2017 FE65, 2017 FE101, 2017 FA1, 2017 EB3, 2015 JA2, 2010 DP
926Tenagra II Obs. in Arizona, 7 in MPECs 2017-F211, 2017-F213, 2017-F215, 2017-F216 & 2017-F217 -- 2017 FV, 2017 FR91, 2017 FQ91, 2017 FQ127, 2017 FP127, 2017 FO127, 2017 FM127
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 5 in MPECs 2017-F211 & 2017-F212 -- 2017 FX90, 2017 FU64, 2017 FL127, 2017 FC1, 2017 FB102
C51WISE in Earth polar orbit, 1 in MPEC 2017-F212 -- 2017 FL127
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 31 March '17

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL 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 JPL NEO Program 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 FT102JPL Sentry16332104-211334.9e-07-8.93-8.980JPL: "Analysis based on 32 observations spanning 2.0587 days (2017-Mar-29.27484 to 2017-Mar-31.33349)." Diameter approximately 0.005 km. from mean, weighted H=29.3.
2017 FB102JPL Sentry16332054-2113102.2e-05-5.74-6.080JPL: "Analysis based on 20 observations spanning 3.0243 days (2017-Mar-27.55104 to 2017-Mar-30.57533)." Diameter approximately 0.016 km. from mean, weighted H=26.6.
2017 FE101JPL Sentry16332054-210499.9e-09-4.72-5.260JPL: "Analysis based on 68 observations spanning 6.0632 days (2017-Mar-25.28533 to 2017-Mar-31.34851)." Diameter approximately 0.550 km. from mean, weighted H=18.9.
2017 FC1JPL Sentry1600206412.6e-07-7.19-7.190JPL: "Analysis based on 81 observations spanning 16.164 days (2017-Mar-14.415078 to 2017-Mar-30.5786)." Diameter approximately 0.020 km. from mean, weighted H=26.1.
2017 FVJPL Sentry1600211312.6e-08-7.49-7.490JPL: "Analysis based on 82 observations spanning 14.043 days (2017-Mar-17.26524 to 2017-Mar-31.30809)." Diameter approximately 0.044 km. from mean, weighted H=24.4.

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 31 March '17

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

1945Generated Traffic Report
1708Grabbed MPEC 2017-F215 - 2017 FO127 - see above
Grabbed MPEC 2017-F216 - 2017 FP127 - see above
Grabbed MPEC 2017-F217 - 2017 FQ127 - see above
1633Noted that JPL Sentry has updated its 2017 FB102 risk assessment - see above
Noted that JPL Sentry has updated its 2017 FE101 risk assessment - see above
Noted that JPL Sentry has updated its 2017 FT102 risk assessment - see above
Grabbed MPEC 2017-F212 - 2017 FL127 - see above
Grabbed MPEC 2017-F213 - 2017 FM127 - see above
Grabbed MPEC 2017-F214 - 2017 FN127 - see above
1600Noted that JPL Sentry has updated its 2017 FC1 risk assessment - see above
Noted that JPL Sentry has reposted 2017 FV as an impact risk - see above
Grabbed MPEC 2017-F211 - Daily Orbit Update - see above