Contents  on 26 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 26 March '17

Seven objects reported inside ten LD

There are seven Solar-System small bodies reported traveling inside ten lunar distances (LD) of Earth today. Nearest is NHATS target 2017 FJ3, which heads out from 2.99 to 3.26 LD.

Earth passage I D ~Size Distance Today  Notes
1.70 LD March 232017 FZ2 16 m  4.39 to 6.18 LD NHATS target, risk
1.98 LD March 212017 FJ 8 m  9.28 to 11.31 LD exits ten LD, NHATS target
2.57 LD March 222017 FJ3 4 m  2.99 to 3.26 LD NHATS target
4.19 LD today2017 FL63 21 m  4.19 LD Earth closest at 2310 UTC - DOU
5.75 LD tomorrow2017 FF3 15 m  5.75 from 5.79 LD NHATS target
7.63 LD today2015 TC25 4 m  7.63 LD radar/NHATS target, risk, Earth closest at 1449 UTC
9.05 LD tomorrow2017 FK3 20 m  9.21 from 9.79 LD DOU
Approaching
3.8   LD April 62017 FU64 62 m  < 10 LD April 4, uncertainty +/- 32 mins., risk
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
9.00 LD April 22017 FV 47 m  < 10 LD March 31, radar target, risk - DOU

This report was generated at 2042 UTC with today's DOU MPEC carrying astrometry for 2017 CS from earlier in the month, plus follow-up for three other objects active in the traffic table here, as well as follow-up for departed NHATS target 2017 FR. We also note that radar observation was announced late the day before yesterday from March 12th for now departed 1998 SL36.



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 26 March '17

The MPC's NEO Confirmation Page has 74 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 74 objects listed. Of these, 29 were "one nighters." So far The Tracking News has counted a total of 100 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 26 March '17

Minor Planet Electronic Circulars

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


MPEC 2017-F138 - "20:22 UT" - Comet C/2017 E1 (Borisov)


MPEC 2017-F137 - "19:59 UT" - Comet C/2017 D2 (Barros)


MPEC 2017-F136 - "19:51 UT" - Comet C/2017 C1 (Neowise)


MPEC 2017-F135 - "16:59 UT" - 2010 JH88


MPEC 2017-F134 - "16:57 UT" - 2016 HJ19


MPEC 2017-F133 - "16:55 UT" - 2011 EO51


<< DOU on 26 Mar. '17 >>  MPEC 2017-F132 - "12:05 UT" - Daily Orbit Update


MPEC 2017-F131 - "02:35 UT" - 2017 FO90


MPEC 2017-F130 - "02:27 UT" - 2017 FN90


MPEC 2017-F129 - "02:24 UT" - 2017 FM90


MPEC 2017-F128 - "02:20 UT" - 2017 FL90


MPEC 2017-F127 - "02:16 UT" - 2017 FK90


MPEC 2017-F126 - "02:13 UT" - 2017 FJ90


MPEC 2017-F125 - "02:11 UT" - 2017 FH90


MPEC 2017-F124 - "02:08 UT" - 2017 FG90


MPEC 2017-F123 - "02:04 UT" - 2017 FF90


MPEC 2017-F122 - "02:01 UT" - 2017 FE90

Observers  on 26 March '17

A total of 39 observers appear in today's MPECs.

CodeObserver / observatory
349Ageo Obs. in Japan, 1 in MPEC 2017-F138 -- C/2017 E1
H21Astronomical Research Obs. Westfield in Illinois, 17 in MPECs 2017-F127, 2017-F128, 2017-F129 & 2017-F132 -- 2017 FM90, 2017 FL90, 2017 FK90, 2017 EU, 2017 EL, 2017 EH, 2017 EC, 2017 DN109, 2017 CS, 2017 CN32, 2017 BL32, 2017 BG85, 2017 AC5, 2016 YV8, 2016 XD1, 2014 AD17, 2007 BX48
T05ATLAS Haleakala in Hawaii, 5 in MPEC 2017-F132 -- 54789, 40267, 10636, 3352, 1627
T08ATLAS Mauna Loa in Hawaii, 10 in MPEC 2017-F132 -- 2017 CR32, 90075, 388838, 370307, 22771, 175189, 143404, 5604, 4055, 3199
I47Auger Obs. in Argentina, 1 in MPEC 2017-F138 -- C/2017 E1
215Buchloe Obs. in Germany, 1 in MPEC 2017-F138 -- C/2017 E1
160Castelmartini Obs. in Italy, 3 in MPEC 2017-F132 -- 378610, 171819, 5587
703Catalina Sky Survey (CSS) in Arizona, 11 in MPEC 2017-F132 -- 2017 CR32, 2010 UD, 2002 FQ4, 485652, 484517, 483662, 175189, 152931, 143404, 11398, 3103
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 2 in MPECs 2017-F126 & 2017-F131 -- 2017 FO90, 2017 FJ90
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2017-F138 -- C/2017 E1
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 2 in MPECs 2017-F123 & 2017-F132 -- 2017 FF90, 162452
J95Great Shefford Obs. in England, 3 in MPECs 2017-F123, 2017-F125 & 2017-F129 -- 2017 FM90, 2017 FH90, 2017 FF90
H06|Hidetaka Sato in Japan via iTelescope Obs. Mayhill in New Mexico, 2 in MPECs 2017-F136 & 2017-F138 -- C/2017 E1, C/2017 C1
Q62iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2017-F132 -- 21088
695@program code "@" (41) via Kitt Peak Natl. Obs. in Arizona, 1 in MPEC 2017-F138 -- C/2017 E1
D95Kurihara Obs. in Japan, 1 in MPEC 2017-F138 -- C/2017 E1
W86LCOGT Cerro Tololo B in Chile, 1 in MPEC 2017-F126 -- 2017 FJ90
V37LCOGT Fort Davis in Texas, 1 in MPEC 2017-F128 -- 2017 FL90
H01Magdalena Ridge Obs. (MRO) in New Mexico, 2 in MPECs 2017-F123 & 2017-F127 -- 2017 FK90, 2017 FF90
W92MASTER OAFA Obs., 1 in MPEC 2017-F132 -- 405427
K95MASTER-II Sutherland in South Africa, 2 in MPEC 2017-F132 -- 175189, 143404
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2017-F133 -- 2011 EO51
568_Marco Micheli on Mauna Kea in Hawaii, 3 in MPECs 2017-F122, 2017-F124 & 2017-F130 -- 2017 FN90, 2017 FG90, 2017 FE90
G96Mt. Lemmon Survey (MLS) in Arizona, 37 in MPECs 2017-F125, 2017-F127, 2017-F128, 2017-F129 & 2017-F132 -- 2017 FY, 2017 FT, 2017 FP63, 2017 FM90, 2017 FL90, 2017 FK90, 2017 FH90, 2017 FH, 2017 ED3, 2014 NA64, 2013 FY7, 2003 XV10, 1998 MR24, 1998 HK1, 480934, 413002, 391033, 374038, 370307, 317212, 280244, 277810, 277279, 252091, 190166, 18109, 175189, 162882, 154988, 153953, 152671, 143404, 10636, 5646, 5626, 5189, 3552
Z80Northolt Branch Obs. in England, 3 in MPEC 2017-F132 -- 2017 FL1, 485652, 4055
J43Oukaimeden Obs. in Morocco, 2 in MPEC 2017-F132 -- 2016 VV3, 5626
F51Pan-STARRS 1 (PS1) in Hawaii, 13 in MPECs 2017-F122, 2017-F123, 2017-F124, 2017-F126, 2017-F130, 2017-F131 & 2017-F132 -- 2017 FP63, 2017 FO90, 2017 FN90, 2017 FJ90, 2017 FG90, 2017 FF90, 2017 FE90, 2016 SD, 2014 NA64, 2013 FY7, 413002, 162882, 162452
D29Purple Mtn. Obs. Xuyi Station in China, 12 in MPEC 2017-F132 -- 2017 EC3, 2017 DS35, 2010 DP, 85275, 374038, 159560, 138359, 138155, 137158, 7480, 2329, 1627
033Schwarzschild Obs. in Germany, 7 in MPECs 2017-F123, 2017-F125, 2017-F128, 2017-F130 & 2017-F132 -- 2017 FX64, 2017 FQ64, 2017 FN90, 2017 FL90, 2017 FH90, 2017 FF90, 2017 FB65
K14Sencelles Obs. in Spain, 1 in MPEC 2017-F132 -- 2017 CR32
G409B. Lutkenhoner in Germany via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2017-F138 -- C/2017 E1
W88!program code "!" (10) via Slooh.com Chile Obs. in Chile, 1 in MPEC 2017-F137 -- C/2017 D2
W883B. Lutkenhoner in Germany via Slooh.com Chile Obs. in Chile, 2 in MPECs 2017-F137 & 2017-F138 -- C/2017 E1, C/2017 D2
Y00SONEAR in Brazil, 2 in MPECs 2017-F137 & 2017-F138 -- C/2017 E1, C/2017 D2
691Spacewatch 0.9m telescope in Arizona, 13 in MPECs 2017-F122, 2017-F124, 2017-F126, 2017-F130, 2017-F131 & 2017-F132 -- 2017 FU, 2017 FO90, 2017 FO2, 2017 FN90, 2017 FM63, 2017 FJ90, 2017 FG90, 2017 FE90, 2017 EW2, 2017 AP20, 2016 YN13, 2004 SW55, 1996 FS1
291Spacewatch 1.8m telescope in Arizona, 5 in MPECs 2017-F122, 2017-F123, 2017-F124, 2017-F125 & 2017-F126 -- 2017 FJ90, 2017 FH90, 2017 FG90, 2017 FF90, 2017 FE90
I52Steward Obs. Mt. Lemmon Station in Arizona, 17 in MPECs 2017-F123, 2017-F124, 2017-F125, 2017-F126, 2017-F127, 2017-F128, 2017-F129 & 2017-F132 -- 2017 FZ64, 2017 FR, 2017 FQ, 2017 FO63, 2017 FN64, 2017 FM90, 2017 FL90, 2017 FK90, 2017 FJ90, 2017 FH90, 2017 FH1, 2017 FG90, 2017 FG63, 2017 FF90, 2017 FB65, 2017 EU, 2017 ET22
J22Tacande Obs. in the Canary Islands, 1 in MPEC 2017-F138 -- C/2017 E1
926Tenagra II Obs. in Arizona, 21 in MPECs 2017-F122, 2017-F123, 2017-F124, 2017-F125, 2017-F127, 2017-F128, 2017-F129, 2017-F130, 2017-F131, 2017-F132, 2017-F134 & 2017-F135 -- 2017 FY, 2017 FX64, 2017 FV, 2017 FO90, 2017 FN90, 2017 FM90, 2017 FL90, 2017 FL63, 2017 FL1, 2017 FK90, 2017 FK3, 2017 FH90, 2017 FH3, 2017 FG90, 2017 FF90, 2017 FE90, 2017 FE1, 2017 FB65, 2017 EG4, 2016 HJ19, 2010 JH88
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 7 in MPECs 2017-F132 & 2017-F133 -- 2017 FV, 2017 FE1, 2017 FC1, 2017 FB1, 2017 ET2, 2011 EO51, 469219
367Yatsuka Obs. in Japan, 1 in MPEC 2017-F138 -- C/2017 E1
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 26 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 FY64NEODyS16002101-210824.97e-09-7.10-7.210NEODyS: "Based on 17 optical observations (of which 0 are rejected as outliers) from 2017-03-18.409 to 2017-03-24.219."
2017 FU64NEODyS16002043-206729.62e-09-6.93-6.950NEODyS: "Based on 23 optical observations (of which 0 are rejected as outliers) from 2017-03-21.352 to 2017-03-24.392."
2017 FL64NEODyS16002111-211721.64e-06-8.06-8.060NEODyS: "Based on 10 optical observations (of which 0 are rejected as outliers) from 2017-03-18.348 to 2017-03-24.281."
2017 FO63NEODyS23072088-210841.39e-06-4.83-5.160NEODyS #2 for the day: "Based on 37 optical observations (of which 0 are rejected as outliers) from 2017-03-21.391 to 2017-03-26.281."
JPL Sentry16302097-210437.3e-07-5.14-5.160JPL: "Analysis based on 37 observations spanning 4.8904 days (2017-Mar-21.38988 to 2017-Mar-26.28024)." Diameter approximately 0.070 km. from mean, weighted H=23.4.
2017 FC3NEODyS16002043-2066313.04e-06-4.54-4.730NEODyS: "Based on 17 optical observations (of which 0 are rejected as outliers) from 2017-03-19.326 to 2017-03-24.928."
2017 FA3NEODyS1600211617.53e-09-9.89-9.890NEODyS: "Based on 22 optical observations (of which 0 are rejected as outliers) from 2017-03-19.343 to 2017-03-24.406."
2017 FC1NEODyS2307206414.35e-07-6.90-6.90NEODyS #2 for the day: "Based on 57 optical observations (of which 0 are rejected as outliers) from 2017-03-14.416 to 2017-03-25.478."
JPL Sentry1600206414.2e-07-6.91-6.910JPL: "Analysis based on 57 observations spanning 11.062 days (2017-Mar-14.415078 to 2017-Mar-25.476838)." Diameter approximately 0.022 km. from mean, weighted H=25.9.
2017 FB1NEODyS23072092-211162.91e-06-4.72-4.890NEODyS #2 for the day: "Based on 37 optical observations (of which 0 are rejected as outliers) from 2017-03-18.208 to 2017-03-24.891."
JPL Sentry16002092-2114143.5e-06-4.64-4.870JPL: "Analysis based on 37 observations spanning 6.6823 days (2017-Mar-18.20739 to 2017-Mar-24.889738)." Diameter approximately 0.072 km. from mean, weighted H=23.4.
2017 FVNEODyS23072091-2116143.1e-07-6.52-6.930NEODyS #2 for the day: "Based on 38 optical observations (of which 0 are rejected as outliers) from 2017-03-17.266 to 2017-03-25.347."
JPL Sentry16002112-211321.1e-07-6.97-7.180JPL: "Analysis based on 38 observations spanning 8.0810 days (2017-Mar-17.26524 to 2017-Mar-25.34626)." Diameter approximately 0.040 km. from mean, weighted H=24.6.
2017 ET2NEODyS2307R E M O V E D-
JPL Sentry1600R E M O V E DJPL: Risk listing removed at 1504 UTC.

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 26 March '17

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

2307Noted that NEODyS has removed 2017 ET2 as an impact risk - see above
Noted that NEODyS has updated its 2017 FB1 risk assessment - see above
Noted that NEODyS has updated its 2017 FC1 risk assessment - see above
Noted that NEODyS has updated its 2017 FO63 risk assessment - see above
Noted that NEODyS has updated its 2017 FV risk assessment - see above
2042Generated Traffic Report
2031Grabbed MPEC 2017-F138 - Comet C/2017 E1 (Borisov) - see above
2002Grabbed MPEC 2017-F136 - Comet C/2017 C1 (Neowise) - see above
Grabbed MPEC 2017-F137 - Comet C/2017 D2 (Barros) - see above
1705Grabbed MPEC 2017-F133 - 2011 EO51 - see above
Grabbed MPEC 2017-F134 - 2016 HJ19 - see above
Grabbed MPEC 2017-F135 - 2010 JH88 - see above
1630Noted that JPL Sentry has updated its 2017 FO63 risk assessment - see above
1600Noted that JPL Sentry has removed 2017 ET2 as an impact risk - see above
Noted that NEODyS has updated its 2017 FA3 risk assessment - see above
Noted that JPL Sentry has updated its 2017 FB1 risk assessment - see above
Noted that NEODyS has updated its 2017 FB1 risk assessment - see above
Noted that JPL Sentry has updated its 2017 FC1 risk assessment - see above
Noted that NEODyS has updated its 2017 FC1 risk assessment - see above
Noted that NEODyS has updated its 2017 FC3 risk assessment - see above
Noted that NEODyS has posted 2017 FL64 as an impact risk - see above
Noted that NEODyS has updated its 2017 FO63 risk assessment - see above
Noted that NEODyS has posted 2017 FU64 as an impact risk - see above
Noted that JPL Sentry has updated its 2017 FV risk assessment - see above
Noted that NEODyS has updated its 2017 FV risk assessment - see above
Noted that NEODyS has posted 2017 FY64 as an impact risk - see above
Grabbed MPEC 2017-F132 - Daily Orbit Update - see above
0401Grabbed MPEC 2017-F122 - 2017 FE90 - see above
Grabbed MPEC 2017-F123 - 2017 FF90 - see above
Grabbed MPEC 2017-F124 - 2017 FG90 - see above
Grabbed MPEC 2017-F125 - 2017 FH90 - see above
Grabbed MPEC 2017-F126 - 2017 FJ90 - see above
Grabbed MPEC 2017-F127 - 2017 FK90 - see above
Grabbed MPEC 2017-F128 - 2017 FL90 - see above
Grabbed MPEC 2017-F129 - 2017 FM90 - see above
Grabbed MPEC 2017-F130 - 2017 FN90 - see above
Grabbed MPEC 2017-F131 - 2017 FO90 - see above