Contents  on 2 April '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 2 April '17

Fourteen objects reported inside ten LD

Fourteen visitors are reported to be less than ten lunar distances (LD) from Earth today, including two new discoveries. Nearest are two NHATS targets. Intruder 2017 FU102 comes in from 1.51 LD to enter the Earth-Moon system, passing us at 0.57 LD at 2017 UTC (after the Moon at 1.50 LD at 1834 UTC) and moving out to 0.62 LD, and 2017 FT102 is also within Earth's SOI, inbound from 1.37 to 1.11 LD.

Earth passage I D ~Size Distance Today  Notes
0.57 LD today2017 FU102 6 m  0.57 LD intruder today, NHATS target, Earth closest at 2017 UTC, Moon closest 1.50 LD at 1834 UTC
0.85 LD March 302017 FJ101 7 m  6.80 to 9.30 LD intruder
1.05 LD tomorrow2017 FT102 4 m  1.11 from 1.37 LD NHATS target, inside Earth SOI
1.35 LD March 292017 FY101 12 m  8.34 to 10.82 LD exits ten LD, NHATS target
2.05 LD tomorrow2017 FQ127 21 m  2.95 from 5.70 LD risk
2.37 LD yesterday2017 FX90 18 m  2.42 to 3.99 LD DOU
2.57 LD March 222017 FJ3 4 m  5.47 to 5.88 LD NHATS target
3.54 LD March 292017 FR91 14 m  7.58 to 9.51 LD NHATS target
5.21 LD April 62017 FW128 12 m  7.49 from 8.55 LD NEW - MPEC
5.75 LD March 272017 FF3 15 m  6.84 to 7.20 LD NHATS target
7.03 LD April 42017 FM101 16 m  7.90 from 9.00 LD NHATS target
7.63 LD March 262015 TC25 4 m  9.03 to 9.46 LD radar/NHATS target, risk
8.18 LD March 312017 FP128 58 m  8.74 to 9.57 LD NEW - MPEC
8.99 LD today2017 FV 47 m  8.99 LD radar target, risk, Earth closest at 0340 UTC - DOU

This report was updated at 2110 UTC with three new discoveries, all seen marked "NEW" in the traffic tables here. None of them are coming inside five LD on their passages this time around. Your first local flying rocks traffic report was generated at 1814 UTC with follow-up in today's DOU MPEC for two objects in the tables plus three departed objects: NHATS target 2017 FR and risk-listed objects 2017 FB102 and NHATS target 2017 FW90.

Approaching (sorted by 10-LD bubble entry date)
7.67 LD April 72017 FS102 14 m  < 10 LD tomorrow, risk
3.74 LD April 62017 FU64 59 m  < 10 LD April 4
9.92 LD April 52017 FX101 30 m  < 10 LD April 4, NHATS target
6.66 LD April 132017 FF128 26 m  < 10 LD April 10, NEW - MPEC
4.57 LD April 192014 JO25 812 m  < 10 LD April 18, radar target
7.92 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. 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 2 April '17

The MPC's NEO Confirmation Page has 59 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 59 objects listed. Of these, seventeen were "one nighters." So far The Tracking News has counted a total of 92 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 2 April '17

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been 23 MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2017-G25 - "19:12 UT" - 2017 FW128


MPEC 2017-G24 - "19:07 UT" - 2017 FV128


MPEC 2017-G23 - "19:03 UT" - 2017 FU128


MPEC 2017-G22 - "18:59 UT" - 2017 FT128


MPEC 2017-G21 - "18:55 UT" - 2017 FS128


MPEC 2017-G20 - "18:52 UT" - 2017 FP128


MPEC 2017-G19 - "18:48 UT" - 2017 FR128


MPEC 2017-G18 - "18:44 UT" - 2017 FQ128


MPEC 2017-G17 - "18:40 UT" - 2017 FO128


MPEC 2017-G16 - "18:36 UT" - 2017 FN128


MPEC 2017-G15 - "18:32 UT" - 2017 FM128


MPEC 2017-G14 - "18:28 UT" - 2017 FL128


MPEC 2017-G13 - "18:24 UT" - 2017 FK128


MPEC 2017-G12 - "18:20 UT" - 2017 FJ128


MPEC 2017-G11 - "18:16 UT" - 2017 FH128


MPEC 2017-G10 - "18:13 UT" - 2017 FG128


MPEC 2017-G09 - "18:09 UT" - 2017 FF128


MPEC 2017-G08 - "18:06 UT" - 2017 FE128


MPEC 2017-G07 - "18:02 UT" - 2017 FD128


MPEC 2017-G06 - "16:46 UT" - Comet C/2017 F1 (Lemmon)


MPEC 2017-G05 - "15:37 UT" - Comet C/2017 E5 (Lemmon)


MPEC 2017-G04 - "15:05 UT" - Comet C/2017 D5 (Panstarrs)


<< DOU on 2 Apr. '17 >>  MPEC 2017-G03 - "12:06 UT" - Daily Orbit Update

Observers  on 2 April '17

A total of 50 observers appear in today's MPECs.

CodeObserver / observatory
C97Al-Fulaij Obs., 1 in MPEC 2017-G03 -- 215588
705"Kristie Nault via Apache Point Obs. in New Mexico, 1 in MPEC 2017-G23 -- 2017 FU128
H21Astronomical Research Obs. Westfield in Illinois, 1 in MPEC 2017-G05 -- C/2017 E5
T05ATLAS Haleakala in Hawaii, 14 in MPEC 2017-G03 -- 2017 DT37, 90075, 484795, 388838, 370702, 370307, 252091, 175189, 143404, 138155, 5604, 4055, 2329, 1036
T08ATLAS Mauna Loa in Hawaii, 4 in MPEC 2017-G03 -- 2017 AC5, 11398, 4179, 3103
300Bisei Spaceguard Center in Japan, 1 in MPEC 2017-G05 -- C/2017 E5
Z84Calar Alto Schmidt in Spain, 3 in MPECs 2017-G18, 2017-G19 & 2017-G22 -- 2017 FT128, 2017 FR128, 2017 FQ128
160Castelmartini Obs. in Italy, 10 in MPECs 2017-G03, 2017-G18 & 2017-G20 -- 2017 FQ128, 2017 FP128, 54789, 405427, 175189, 143404, 138155, 10636, 3352, 1627
703Catalina Sky Survey in Arizona, 1 in MPEC 2017-G20 -- 2017 FP128
107Cavezzo Obs. in Italy, 1 in MPEC 2017-G20 -- 2017 FP128
K51Celado Obs. in Italy, 2 in MPECs 2017-G05 & 2017-G06 -- C/2017 F1, C/2017 E5
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 8 in MPECs 2017-G03, 2017-G04, 2017-G07, 2017-G12, 2017-G13 & 2017-G14 -- 2017 FX2, 2017 FL128, 2017 FK128, 2017 FJ128, 2017 FH1, 2017 FD128, 2017 ED4, C/2017 D5
970Chelmsford Obs. in England, 1 in MPEC 2017-G20 -- 2017 FP128
595Farra d'Isonzo Obs. in Italy, 4 in MPECs 2017-G05, 2017-G18, 2017-G20 & 2017-G25 -- 2017 FW128, 2017 FQ128, 2017 FP128, C/2017 E5
J95Great Shefford Obs. in England, 6 in MPECs 2017-G03, 2017-G15, 2017-G17, 2017-G19, 2017-G20 & 2017-G25 -- 2017 FW128, 2017 FV, 2017 FR128, 2017 FP128, 2017 FO128, 2017 FM128
H06|Hidetaka Sato in Japan via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2017-G06 -- C/2017 F1
Q621Hidetaka Sato in Japan via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2017-G04 -- C/2017 D5
Q62|Sergio Foglia in Italy via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2017-G20 -- 2017 FP128
J87La Canada Obs. in Spain, 1 in MPEC 2017-G05 -- C/2017 E5
V37LCOGT Fort Davis in Texas, 1 in MPEC 2017-G23 -- 2017 FU128
K92LCOGT Sutherland B in South Africa, 4 in MPECs 2017-G03, 2017-G04, 2017-G13 & 2017-G14 -- 2017 FX2, 2017 FL128, 2017 FK128, C/2017 D5
K93LCOGT Sutherland C in South Africa, 1 in MPEC 2017-G12 -- 2017 FJ128
K30Luscherz Obs. in Switzerland, 1 in MPEC 2017-G20 -- 2017 FP128
K38M57 Obs. in Italy, 1 in MPEC 2017-G18 -- 2017 FQ128
H01Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2017-G06 -- C/2017 F1
C10Maisoncelles Obs. in France, 1 in MPEC 2017-G05 -- C/2017 E5
568_Marco Micheli on Mauna Kea in Hawaii, 7 in MPECs 2017-G04, 2017-G08, 2017-G09, 2017-G12, 2017-G13, 2017-G14 & 2017-G21 -- 2017 FS128, 2017 FL128, 2017 FK128, 2017 FJ128, 2017 FF128, 2017 FE128, C/2017 D5
474Mt. John Obs. in New Zealand, 1 in MPEC 2017-G04 -- C/2017 D5
G96Mt. Lemmon Survey (MLS) in Arizona, 14 in MPECs 2017-G03, 2017-G05, 2017-G06, 2017-G10, 2017-G11, 2017-G15, 2017-G16, 2017-G17, 2017-G18, 2017-G19, 2017-G22, 2017-G23, 2017-G24 & 2017-G25 -- 2017 FW128, 2017 FV128, 2017 FU128, 2017 FT128, 2017 FR128, 2017 FQ128, 2017 FO128, 2017 FN128, 2017 FM128, 2017 FM102, 2017 FH128, 2017 FG128, C/2017 F1, C/2017 E5
C47Nonndorf Obs. in Austria, 2 in MPECs 2017-G18 & 2017-G20 -- 2017 FQ128, 2017 FP128
J69North Obs. in England, 1 in MPEC 2017-G20 -- 2017 FP128
Z80Northolt Branch Obs. in England, 1 in MPEC 2017-G20 -- 2017 FP128
G34Oberfrauendorf Obs. in Germany, 1 in MPEC 2017-G20 -- 2017 FP128
F51Pan-STARRS 1 (PS1) in Hawaii, 28 in MPECs 2017-G03, 2017-G04, 2017-G05, 2017-G07, 2017-G08, 2017-G09, 2017-G12, 2017-G13, 2017-G14, 2017-G16, 2017-G21 & 2017-G25 -- 2017 FX2, 2017 FW128, 2017 FS128, 2017 FN128, 2017 FL128, 2017 FK128, 2017 FJ128, 2017 FH101, 2017 FF128, 2017 FE128, 2017 FD128, 2017 FA1, C/2017 E5, 2017 DT15, C/2017 D5, 2017 CR32, 2017 BW32, 2013 FY7, 2006 JZ25, 2000 AF205, 1998 HK1, 65706, 482391, 370307, 162882, 162452, 153953, 141527
K63Pascoli Obs. in Italy, 3 in MPECs 2017-G17, 2017-G18 & 2017-G20 -- 2017 FQ128, 2017 FP128, 2017 FO128
W98Polonia Obs. in Chile, 1 in MPEC 2017-G03 -- 7341
W25RMS Obs., 2 in MPECs 2017-G18 & 2017-G20 -- 2017 FQ128, 2017 FP128
L04ROASTERR-1 in Romania, 1 in MPEC 2017-G20 -- 2017 FP128
K61Rokycany Obs. in the Czech Republic, 4 in MPECs 2017-G05, 2017-G17, 2017-G18 & 2017-G20 -- 2017 FQ128, 2017 FP128, 2017 FO128, C/2017 E5
104San Marcello Pistoiese Obs. in Italy, 3 in MPECs 2017-G19, 2017-G20 & 2017-G22 -- 2017 FT128, 2017 FR128, 2017 FP128
L23Schela Obs. in Romania, 1 in MPEC 2017-G20 -- 2017 FP128
033Schwarzschild Obs. in Germany, 13 in MPECs 2017-G05, 2017-G10, 2017-G11, 2017-G15, 2017-G16, 2017-G17, 2017-G18, 2017-G19, 2017-G20, 2017-G21, 2017-G22, 2017-G23 & 2017-G25 -- 2017 FW128, 2017 FU128, 2017 FT128, 2017 FS128, 2017 FR128, 2017 FQ128, 2017 FP128, 2017 FO128, 2017 FN128, 2017 FM128, 2017 FH128, 2017 FG128, C/2017 E5
587Sormano Obs. in Italy, 2 in MPECs 2017-G18 & 2017-G20 -- 2017 FQ128, 2017 FP128
691Spacewatch 0.9m telescope in Arizona, 14 in MPECs 2017-G03, 2017-G04, 2017-G08, 2017-G13, 2017-G14, 2017-G15 & 2017-G21 -- 2017 FY90, 2017 FV64, 2017 FS128, 2017 FR, 2017 FP64, 2017 FO91, 2017 FN90, 2017 FM128, 2017 FL128, 2017 FK128, 2017 FH3, 2017 FE128, 2017 FE1, C/2017 D5
291Spacewatch 1.8m telescope in Arizona, 10 in MPECs 2017-G03, 2017-G04, 2017-G08, 2017-G09, 2017-G12 & 2017-G16 -- 2017 FR102, 2017 FN128, 2017 FJ128, 2017 FF128, 2017 FE128, 2017 FB102, C/2017 D5, 2017 BK3, 2017 BD29, 2017 AP20
V78Spirit Marsh Obs. in Minnesota, 1 in MPEC 2017-G03 -- 143404
I93St. Pardon de Conques Obs. in France, 1 in MPEC 2017-G05 -- C/2017 E5
I52Steward Obs. Mt. Lemmon Station in Arizona, 13 in MPECs 2017-G04, 2017-G05, 2017-G06, 2017-G10, 2017-G11, 2017-G16, 2017-G17, 2017-G18, 2017-G19, 2017-G20, 2017-G22, 2017-G24 & 2017-G25 -- 2017 FW128, 2017 FV128, 2017 FT128, 2017 FR128, 2017 FQ128, 2017 FP128, 2017 FO128, 2017 FN128, 2017 FH128, 2017 FG128, C/2017 F1, C/2017 E5, C/2017 D5
J22Tacande Obs. in the Canary Islands, 1 in MPEC 2017-G20 -- 2017 FP128
926Tenagra II Obs. in Arizona, 18 in MPECs 2017-G03, 2017-G06, 2017-G08, 2017-G10, 2017-G11, 2017-G12, 2017-G14, 2017-G15, 2017-G16, 2017-G17, 2017-G18, 2017-G19, 2017-G20, 2017-G21, 2017-G22, 2017-G23, 2017-G24 & 2017-G25 -- 2017 FX90, 2017 FW128, 2017 FV128, 2017 FU128, 2017 FT128, 2017 FS128, 2017 FR128, 2017 FQ128, 2017 FP128, 2017 FO128, 2017 FN128, 2017 FM128, 2017 FL128, 2017 FJ128, 2017 FH128, 2017 FG128, 2017 FE128, C/2017 F1
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 4 in MPEC 2017-G03 -- 2017 FW90, 2017 FR102, 2017 FC1, 2017 FB102
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 2 April '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 FO128JPL Sentry21302076-210969.9e-06-3.97-4.150JPL: "Analysis based on 37 observations spanning 2.7739 days (2017-Mar-30.26183 to 2017-Apr-02.03577)." Diameter approximately 0.100 km. from mean, weighted H=22.6.
2017 FN128JPL Sentry21302054-2116272.0e-06-2.48-2.960JPL: "Analysis based on 39 observations spanning 4.9597 days (2017-Mar-27.30332 to 2017-Apr-01.263)." Diameter approximately 0.520 km. from mean, weighted H=19.1.
2017 FQ127NEODyS1530211611.6e-11-11.51-11.510NEODyS: "Based on 35 optical observations (of which 1 are rejected as outliers) from 2017-03-29.424 to 2017-03-31.928."
2017 FT102NEODyS1530R E M O V E D-
2017 FS102NEODyS15302051-211725.87e-07-7.12-7.120NEODyS: "Based on 14 optical observations (of which 0 are rejected as outliers) from 2017-03-28.303 to 2017-03-31.284."
2017 FR102JPL Sentry16302089-2117141.1e-05-4.96-5.070JPL: "Analysis based on 15 observations spanning 4.9412 days (2017-Mar-27.55657 to 2017-Apr-01.49777)." Diameter approximately 0.042 km. from mean, weighted H=24.5.
2017 FB102JPL Sentry16002054-210244.8e-07-7.20-7.400JPL: "Analysis based on 26 observations spanning 4.9628 days (2017-Mar-27.55104 to 2017-Apr-01.51382)." Diameter approximately 0.015 km. from mean, weighted H=26.8.
2017 FE101NEODyS15302079-210422.8e-11-7.34-7.640NEODyS: "Based on 77 optical observations (of which 0 are rejected as outliers) from 2017-03-25.286 to 2017-04-01.440."
2017 FX90NEODyS1530R E M O V E D-
2017 FW90JPL Sentry15302101-210452.7e-05-6.52-6.830JPL: "Analysis based on 68 observations spanning 6.0137 days (2017-Mar-25.34512 to 2017-Mar-31.358779)." Diameter approximately 0.008 km. from mean, weighted H=28.1.
NEODyS15302101-211775.22e-05-6.23-6.720NEODyS: "Based on 70 optical observations (of which 6 are rejected as outliers) from 2017-03-25.346 to 2017-03-30.476."
2017 FO63NEODyS1530209712.76e-06-4.56-4.560NEODyS: "Based on 58 optical observations (of which 0 are rejected as outliers) from 2017-03-21.391 to 2017-03-31.250."
2017 FC1JPL Sentry1530206411.6e-07-7.41-7.410JPL: "Analysis based on 83 observations spanning 17.086 days (2017-Mar-14.415078 to 2017-Mar-31.501512)." Diameter approximately 0.020 km. from mean, weighted H=26.1.
2017 FVJPL Sentry1530211314.7e-08-7.24-7.240JPL: "Analysis based on 88 observations spanning 15.609 days (2017-Mar-17.26524 to 2017-Apr-01.873953)." Diameter approximately 0.045 km. from mean, weighted H=24.4.
NEODyS15302101-211466.19e-08-7.09-7.490NEODyS: "Based on 85 optical observations (of which 0 are rejected as outliers) from 2017-03-17.266 to 2017-03-31.861."

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 2 April '17

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

2130Noted that JPL Sentry has posted 2017 FN128 as an impact risk - see above
Noted that JPL Sentry has posted 2017 FO128 as an impact risk - see above
2110Updated Traffic Report
1930Grabbed MPEC 2017-G22 - 2017 FT128 - see above
Grabbed MPEC 2017-G23 - 2017 FU128 - see above
Grabbed MPEC 2017-G24 - 2017 FV128 - see above
Grabbed MPEC 2017-G25 - 2017 FW128 - see above
1900Grabbed MPEC 2017-G15 - 2017 FM128 - see above
Grabbed MPEC 2017-G16 - 2017 FN128 - see above
Grabbed MPEC 2017-G17 - 2017 FO128 - see above
Grabbed MPEC 2017-G18 - 2017 FQ128 - see above
Grabbed MPEC 2017-G19 - 2017 FR128 - see above
Grabbed MPEC 2017-G20 - 2017 FP128 - see above
Grabbed MPEC 2017-G21 - 2017 FS128 - see above
1831Grabbed MPEC 2017-G07 - 2017 FD128 - see above
Grabbed MPEC 2017-G08 - 2017 FE128 - see above
Grabbed MPEC 2017-G09 - 2017 FF128 - see above
Grabbed MPEC 2017-G10 - 2017 FG128 - see above
Grabbed MPEC 2017-G11 - 2017 FH128 - see above
Grabbed MPEC 2017-G12 - 2017 FJ128 - see above
Grabbed MPEC 2017-G13 - 2017 FK128 - see above
Grabbed MPEC 2017-G14 - 2017 FL128 - see above
1700Grabbed MPEC 2017-G06 - Comet C/2017 F1 (Lemmon) - see above
1630Noted that JPL Sentry has updated its 2017 FR102 risk assessment - see above
1600Noted that JPL Sentry has updated its 2017 FB102 risk assessment - see above
Grabbed MPEC 2017-G05 - Comet C/2017 E5 (Lemmon) - see above
1530Noted that JPL Sentry has updated its 2017 FC1 risk assessment - see above
Noted that NEODyS has updated its 2017 FE101 risk assessment - see above
Noted that NEODyS has updated its 2017 FO63 risk assessment - see above
Noted that NEODyS has updated its 2017 FQ127 risk assessment - see above
Noted that NEODyS has updated its 2017 FS102 risk assessment - see above
Noted that NEODyS has removed 2017 FT102 as an impact risk - see above
Noted that JPL Sentry has reposted 2017 FV as an impact risk - see above
Noted that NEODyS has updated its 2017 FV risk assessment - see above
Noted that JPL Sentry has updated its 2017 FW90 risk assessment - see above
Noted that NEODyS has updated its 2017 FW90 risk assessment - see above
Noted that NEODyS has removed 2017 FX90 as an impact risk - see above
Grabbed MPEC 2017-G03 - Daily Orbit Update - see above
Grabbed MPEC 2017-G04 - Comet C/2017 D5 (Panstarrs) - see above