Contents  on 30 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 30 March '17

Eleven objects reported inside ten LD

There are eleven asteroidal objects reported to be less than ten lunar distances (LD) from Earth today. Nearest is intruder 2017 FJ101, which is inside our planet's SOI (sphere of gravitational influence) all day, starting at 1.18 LD, passing us at 0.85 LD at 0750 UTC, and moving out to 1.90 LD. Outbound from 1.54 to 3.51 LD, NHATS target 2017 FY101 leaves the SOI and comes its closest to the Moon this time around -- 1.57 LD at 0034 UTC. And newly announced risk-listed 2017 FT102 enters the SOI, inbound from 2.62 to 2.17 LD. Meanwhile, newest discovery 2017 FU102 is outside our ten-LD traffic reporting sphere but on its way to fly past Earth at 0.57 LD on April 2nd.

Earth passage I D ~Size Distance Today  Notes
0.57 LD April 22017 FU102 7 m  4.73 from 6.37 LD NEW, intruder - MPEC
0.85 LD today2017 FJ101 7 m  0.85 LD intruder today, Earth closest at 0750 UTC, Moon closest 1.16 LD at 1510 UTC - DOU
1.05 LD April 32017 FT102 5 m  2.17 from 2.62 LD NEW, enters Earth SOI, risk - MPEC
1.35 LD yesterday2017 FY101 12 m  1.54 to 3.51 LD NHATS target, exits Earth SOI, Moon closest 1.57 LD at 0034 UTC - DOU
2.37 LD April 12017 FX90 19 m  5.53 from 8.09 LD risk - DOU
2.57 LD March 222017 FJ3 4 m  4.28 to 4.66 LD NHATS target
3.51 LD March 222017 FW90 8 m  7.84 to 8.72 LD NHATS target, risk - DOU
3.54 LD yesterday2017 FR91 14 m  3.56 to 4.31 LD NHATS target - DOU
5.75 LD March 272017 FF3 15 m  6.03 to 6.25 LD NHATS target
7.63 LD March 262015 TC25 4 m  8.04 to 8.31 LD radar/NHATS target, risk
9.04 LD March 272017 FK3 20 m  9.99 to 10.98 LD exits ten LD

This report was generated at 1921 UTC with three new discoveries, all additions (marked "NEW") to the traffic tables here. One of them, 2017 FT102, is lingering inside ten LD for about 40 days. Today's DOU MPEC has the recovery of distant 2014 HQ124 and follow-up for seven objects active in the tables and for distant 2017 FB3 as well as for ten departed objects: 2017 FT101, 2017 FL101, 2017 FU90, and NHATS targets 2017 FU101, 2017 FS91, 2017 FS90, 2017 FR63, 2017 FQ63, 2017 FM2, and 2017 FR.

Approaching (sorted by 10-LD bubble entry date)
8.99 LD April 22017 FV 47 m  < 10 LD tomorrow, radar target, risk
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, NEW, risk - MPEC
3.74 LD April 62017 FU64 61 m  < 10 LD April 4 - DOU
9.91 LD April 52017 FX101 30 m  < 10 LD April 4, NHATS target
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



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. "Distant" is used here to describe an object that has come within ten LD since A/CC began these traffic reports (2007) but is not presently so close. 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 30 March '17

The MPC's NEO Confirmation Page has 72 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 72 objects listed. Of these, 35 were "one nighters." So far The Tracking News has counted a total of 87 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 30 March '17

Minor Planet Electronic Circulars

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


MPEC 2017-F210 - "21:22 UT" - 2013 RP98


MPEC 2017-F209 - "16:09 UT" - Comet C/2017 E4 (Lovejoy)


MPEC 2017-F208 - "15:51 UT" - Comet C/2017 E3 (Panstarrs)


MPEC 2017-F207 - "14:55 UT" - Comet C/2017 E2 (XuYi)


<< DOU on 30 Mar. '17 >>  MPEC 2017-F206 - "12:06 UT" - Daily Orbit Update


MPEC 2017-F205 - "11:30 UT" - 2009 HG


MPEC 2017-F204 - "11:28 UT" - 2008 YA


MPEC 2017-F203 - "10:54 UT" - 2017 FU102


MPEC 2017-F202 - "10:50 UT" - 2017 FT102


MPEC 2017-F201 - "10:46 UT" - 2017 FS102

Observers  on 30 March '17

A total of 51 observers appear in today's MPECs.

CodeObserver / observatory
349Ageo Obs. in Japan, 1 in MPEC 2017-F209 -- C/2017 E4
T05ATLAS Haleakala in Hawaii, 12 in MPEC 2017-F206 -- 2017 AC5, 54789, 484795, 40267, 138359, 10636, 5653, 5131, 4179, 3352, 1627, 887
I47Auger Obs. in Argentina, 1 in MPEC 2017-F209 -- C/2017 E4
300Bisei Spaceguard Center in Japan, 1 in MPEC 2017-F207 -- C/2017 E2
215Buchloe Obs. in Germany, 1 in MPEC 2017-F207 -- C/2017 E2
W96Campo Catino Austral Obs. (CAO) in Chile, 2 in MPECs 2017-F207 & 2017-F209 -- C/2017 E4, C/2017 E2
160Castelmartini Obs. in Italy, 18 in MPEC 2017-F206 -- 2017 DT37, 2017 DC38, 2017 AC5, 2016 QD, 65674, 484795, 405427, 388838, 370307, 275611, 252091, 175189, 143404, 138359, 138155, 137158, 5836, 5626
703Catalina Sky Survey (CSS) in Arizona, 36 in MPECs 2017-F206 & 2017-F207 -- 2017 EN, C/2017 E2, 2017 DT37, 2017 CR32, 2017 AC5, 2011 ED78, 2006 UM, 2006 EC1, 2003 FR6, 1998 HK1, 90075, 89830, 486607, 485652, 484517, 484506, 483459, 475665, 456651, 448003, 413002, 405427, 374038, 370702, 370307, 252793, 250620, 190166, 163696, 162882, 138155, 5626, 5604, 3552, 1917, 887
107Cavezzo Obs. in Italy, 1 in MPEC 2017-F206 -- 2017 CR32
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 4 in MPECs 2017-F205 & 2017-F206 -- 2017 FA1, 2017 EJ3, 2017 CG1, 2009 HG
A77Chante-Perdrix Obs. in France, 1 in MPEC 2017-F207 -- C/2017 E2
106Crni Vrh Obs. in Slovenia, 1 in MPEC 2017-F204 -- 2008 YA
958Dax Obs. in France, 1 in MPEC 2017-F202 -- 2017 FT102
W847David Gerdes in Michigan via DECam in Chile, 1 in MPEC 2017-F210 -- 2013 RP98
K79Erfurt Obs., 1 in MPEC 2017-F206 -- 175189
151Eschenberg Obs. in Switzerland, 3 in MPECs 2017-F202 & 2017-F206 -- 2017 FT102, 143404, 5604
006Fabra Obs. in Spain, 4 in MPEC 2017-F206 -- 90075, 143404, 11398, 10636
E10*program code "*" (19) via Faulkes Telescope South in New South Wales, 1 in MPEC 2017-F206 -- 2017 FU64
157Frasso Sabino Obs. in Italy, 2 in MPECs 2017-F207 & 2017-F209 -- C/2017 E4, C/2017 E2
K73Gravina Obs. in Italy, 3 in MPEC 2017-F206 -- 143404, 11398, 5604
C43Hoyerswerda Obs. in Germany, 1 in MPEC 2017-F206 -- 2017 FE101
U695Hidetaka Sato in Japan via iTelescope Obs. Auberry in northern California, 1 in MPEC 2017-F207 -- C/2017 E2
H06iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2017-F209 -- C/2017 E4
H06|Hidetaka Sato in Japan via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2017-F209 -- C/2017 E4
Q62|Sergio Foglia in Italy via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2017-F208 -- C/2017 E3
695@program code "@" (41) via Kitt Peak Natl. Obs. (KPNO) in Arizona, 2 in MPECs 2017-F207 & 2017-F209 -- C/2017 E4, C/2017 E2
D95Kurihara Obs. in Japan, 1 in MPEC 2017-F209 -- C/2017 E4
Z43Landehen Obs., 3 in MPEC 2017-F206 -- 143404, 11398, 10636
W86LCOGT Cerro Tololo B in Chile, 1 in MPEC 2017-F206 -- 2017 FB3
V37LCOGT Fort Davis in Texas, 1 in MPEC 2017-F206 -- 2017 FM2
K93LCOGT Sutherland C in South Africa, 1 in MPEC 2017-F206 -- 2017 FB3
H01Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2017-F207 -- C/2017 E2
568_Marco Micheli on Mauna Kea in Hawaii, 1 in MPEC 2017-F201 -- 2017 FS102
B67Mirasteilas Obs. in Switzerland, 3 in MPEC 2017-F206 -- 2017 AC5, 2006 EC1, 2003 FR6
474Mt. John Obs. in New Zealand, 16 in MPEC 2017-F206 -- 2017 FY101, 2017 FW90, 2017 FU101, 2017 FT90, 2017 FT2, 2017 FP101, 2017 FP, 2017 FN91, 2017 FM101, 2017 FK91, 2017 FK101, 2017 FJ101, 2017 FD1, 2017 FC1, 2017 DQ15, 2017 BQ93
G96Mt. Lemmon Survey (MLS) in Arizona, 13 in MPECs 2017-F202, 2017-F203 & 2017-F206 -- 2017 FW90, 2017 FU102, 2017 FT102, 2017 FM90, 2017 FM102, 2017 CK1, 2017 AP20, 2017 AC5, 2011 QP96, 484725, 474451, 190758, 7480
X14Orbis Tertius Obs. in Argentina, 1 in MPEC 2017-F208 -- C/2017 E3
F51Pan-STARRS 1 (PS1) in Hawaii, 29 in MPECs 2017-F201, 2017-F205, 2017-F206, 2017-F207 & 2017-F208 -- 2017 FY90, 2017 FT2, 2017 FS102, 2017 FR64, 2017 FR101, 2017 FR, 2017 FN64, 2017 FL101, 2017 FG101, 2017 ES2, 2017 ED3, C/2017 E3, C/2017 E2, 2014 KF91, 2014 GD45, 2009 HG, 2009 FF19, 2006 JZ25, 2002 FQ4, 65803, 485823, 405427, 388838, 317212, 274138, 190161, 186823, 159857, 5324
D29Purple Mtn. Obs. Xuyi Station in China, 3 in MPECs 2017-F206 & 2017-F207 -- C/2017 E2, 2013 CL118, 3103
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2017-F202 -- 2017 FT102
C95SATINO-1 in France, 1 in MPEC 2017-F206 -- 2017 AC5
G40!M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2017-F206 -- 2017 FX90
W883B. Lutkenhoner in Germany via Slooh.com Chile Obs. in Chile, 1 in MPEC 2017-F209 -- C/2017 E4
W885M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Chile Obs. in Chile, 1 in MPEC 2017-F209 -- C/2017 E4
W887program code 7 via Slooh.com Chile Obs. in Chile, 1 in MPEC 2017-F206 -- 2017 FR90
Y00SONEAR in Brazil, 1 in MPEC 2017-F209 -- C/2017 E4
691Spacewatch 0.9m telescope in Arizona, 8 in MPECs 2017-F203 & 2017-F206 -- 2017 FW90, 2017 FU102, 2017 FQ64, 2017 FH3, 2017 FE101, 2017 FC1, 2016 TH56, 5626
291Spacewatch 1.8m telescope in Arizona, 10 in MPEC 2017-F206 -- 2017 FU64, 2017 FC3, 2017 BD29, 2017 AM4, 2016 PR8, 2014 HQ124, 2011 PS, 2009 WZ104, 2008 CH116, 2006 KQ1
W34Squirrel Valley Obs. in North Carolina, 1 in MPEC 2017-F206 -- 5189
I93St. Pardon de Conques Obs. in France, 2 in MPECs 2017-F202 & 2017-F203 -- 2017 FU102, 2017 FT102
I52Steward Obs. Mt. Lemmon Station in Arizona, 21 in MPECs 2017-F202, 2017-F203 & 2017-F206 -- 2017 FY90, 2017 FW90, 2017 FU90, 2017 FU102, 2017 FT102, 2017 FS91, 2017 FS90, 2017 FR63, 2017 FQ91, 2017 FQ63, 2017 FP91, 2017 FP64, 2017 FN64, 2017 FM90, 2017 FL90, 2017 FH90, 2017 FE65, 2017 FC1, 2017 FA1, 2017 EB3, 388838
926Tenagra II Obs. in Arizona, 14 in MPECs 2017-F201, 2017-F204 & 2017-F206 -- 2017 FY90, 2017 FX90, 2017 FV90, 2017 FT90, 2017 FT101, 2017 FS91, 2017 FS102, 2017 FR91, 2017 FL1, 2017 FJ101, 2017 DC38, 2016 SM3, 2012 HN8, 2008 YA
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 3 in MPEC 2017-F206 -- 2017 DR15, 2016 XH2, 2016 TH56
367Yatsuka Obs. in Japan, 1 in MPEC 2017-F209 -- C/2017 E4
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 30 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 FT102NEODyS17012107-211542.84e-06-8.18-8.210NEODyS: "Based on 28 optical observations (of which 0 are rejected as outliers) from 2017-03-29.276 to 2017-03-30.218."
JPL Sentry15002104-211336.3e-06-7.83-7.900JPL: "Analysis based on 28 observations spanning .94191 days (2017-Mar-29.27484 to 2017-Mar-30.21675)." Diameter approximately 0.005 km. from mean, weighted H=29.4.
2017 FS102NEODyS17012051-211727.41e-07-7.02-7.020NEODyS: "Based on 12 optical observations (of which 0 are rejected as outliers) from 2017-03-28.303 to 2017-03-30.151."
JPL Sentry1500205111.7e-07-7.66-7.660JPL: "Analysis based on 12 observations spanning 1.8488 days (2017-Mar-28.30176 to 2017-Mar-30.15061)." Diameter approximately 0.014 km. from mean, weighted H=26.9.
2017 FR102NEODyS15002089-2117275.95e-06-5.25-5.360NEODyS: "Based on 10 optical observations (of which 0 are rejected as outliers) from 2017-03-27.557 to 2017-03-29.440."
2017 FE101JPL Sentry16192054-210489.5e-09-4.74-5.360JPL: "Analysis based on 58 observations spanning 4.9574 days (2017-Mar-25.28533 to 2017-Mar-30.24277)." Diameter approximately 0.563 km. from mean, weighted H=18.9.
2017 FW90JPL Sentry16192101-210349.4e-06-6.92-7.260JPL: "Analysis based on 52 observations spanning 4.8944 days (2017-Mar-25.34512 to 2017-Mar-30.23956)." Diameter approximately 0.008 km. from mean, weighted H=28.0.
NEODyS15002101-211781.7e-05-6.59-7.080NEODyS: "Based on 43 optical observations (of which 4 are rejected as outliers) from 2017-03-25.346 to 2017-03-29.302."
2017 FU64JPL Sentry1530R E M O V E DJPL: Risk listing removed at 1507 UTC.
2017 FO63NEODyS15002097-210822.46e-06-4.60-4.60NEODyS: "Based on 52 optical observations (of which 0 are rejected as outliers) from 2017-03-21.391 to 2017-03-29.166."
2017 FC3NEODyS17012051-205957.15e-07-5.21-5.270NEODyS: "Based on 26 optical observations (of which 0 are rejected as outliers) from 2017-03-19.326 to 2017-03-30.351."
JPL Sentry16192051-206055.3e-07-5.34-5.460JPL: "Analysis based on 26 observations spanning 11.025 days (2017-Mar-19.32518 to 2017-Mar-30.35053)." Diameter approximately 0.068 km. from mean, weighted H=23.5.
2017 FC1NEODyS1701206415.65e-06-5.85-5.850NEODyS #2 for the day: "Based on 79 optical observations (of which 2 are rejected as outliers) from 2017-03-14.416 to 2017-03-29.642."
JPL Sentry1530206412.3e-06-6.24-6.240JPL: "Analysis based on 77 observations spanning 15.226 days (2017-Mar-14.415078 to 2017-Mar-29.64118)." Diameter approximately 0.021 km. from mean, weighted H=26.1.
2017 FVNEODyS15002106-2117101.92e-07-6.68-7.020NEODyS: "Based on 75 optical observations (of which 0 are rejected as outliers) from 2017-03-17.266 to 2017-03-29.222."

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 30 March '17

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

2143Grabbed MPEC 2017-F210 - 2013 RP98 - see above
1921Generated Traffic Report
1701Noted 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 FS102 as an impact risk - see above
Noted that NEODyS has posted 2017 FT102 as an impact risk - see above
1623Grabbed MPEC 2017-F209 - Comet C/2017 E4 (Lovejoy) - see above
1619Noted that JPL Sentry has updated its 2017 FC3 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 FW90 risk assessment - see above
1600Grabbed MPEC 2017-F208 - Comet C/2017 E3 (Panstarrs) - see above
1530Noted that JPL Sentry has updated its 2017 FC1 risk assessment - see above
Noted that JPL Sentry has removed 2017 FU64 as an impact risk - see above
1500Noted 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 posted 2017 FR102 as an impact risk - see above
Noted that JPL Sentry has posted 2017 FS102 as an impact risk - see above
Noted that JPL Sentry has posted 2017 FT102 as an impact risk - see above
Noted that NEODyS has updated its 2017 FV risk assessment - see above
Noted that NEODyS has updated its 2017 FW90 risk assessment - see above
Grabbed MPEC 2017-F201 - 2017 FS102 - see above
Grabbed MPEC 2017-F202 - 2017 FT102 - see above
Grabbed MPEC 2017-F203 - 2017 FU102 - see above
Grabbed MPEC 2017-F204 - 2008 YA - see above
Grabbed MPEC 2017-F205 - 2009 HG - see above
Grabbed MPEC 2017-F206 - Daily Orbit Update - see above
Grabbed MPEC 2017-F207 - Comet C/2017 E2 (XuYi) - see above