Contents  on 5 February '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 5 February '17

Eleven objects reported inside ten LD

There are eleven visitors known to be traveling within ten lunar distances (LD) of our planet today. Nearest is NHATS target 2017 BG30, which comes its closest to Earth on this passage -- 2.48 LD at 1324 UTC. Also coming their closest, but much further out, 2013 FK reaches 7.10 LD at 1731 UTC and risk-listed 2017 BK30 comes to 8.64 LD at 2150 UTC. Meanwhile, 2017 BB6 leaves our ten-LD traffic reporting "bubble," heading off from 8.31 to 10.05 LD.

Earth passage I D ~Size Distance Today  Notes
0.42 LD Feb. 22017 BS32 11 m  5.53 to 8.08 LD intruder - DOU
1.03 LD Jan. 312017 BJ30 16 m  6.43 to 7.71 LD NHATS target
2.48 LD today2017 BG30 4 m  2.48 LD NHATS target, Earth closest at 1324 UTC
2.97 LD Jan. 312017 BB7 9 m  7.45 to 8.94 LD NHATS target
3.36 LD Feb. 82017 BM93 17 m  7.62 from 9.83 LD DOU
4.27 LD tomorrow2017 CR 17 m  4.31 from 6.19 LD
4.84 LD Feb. 12017 BN92 25 m  6.80 to 7.86 LD
5.57 LD Feb. 22017 BB6 13 m  8.31 to 10.05 LD exits ten LD
6.57 LD Feb. 72017 BQ6 181 m  7.31 from 8.71 LD DOU
7.10 LD today2013 FK 78 m  7.10 LD Earth closest at 1731 UTC
8.64 LD today2017 BK30 12 m  8.64 LD risk, Earth closest at 2150 - DOU

This report was updated at 2305 UTC with the discoveries of approaching 2017 CP1 (MPEC), which is calculated to come into the bubble on or about February 15th, and already departed 2017 CR1 (MPEC), which flew past us at 8.70 LD on January 31st.
        Your first neighborhood asteroid traffic report was generated at 1918 UTC with today's DOU MPEC carrying first follow-up for inbound 2017 BM93 and three risk-listed objects: approaching 2017 CS and 2017 BY93 and departed 2017 BG92, along with continuing follow-up for outbound intruder 2017 BS32, passing risk-listed 2017 BK30, inbound 2017 BQ6, approaching radar/NHATS target 2017 BW, and three departed objects: 2017 BM30 and risk-listed 2017 BE30 and 2017 BD6.

Approaching (sorted by 10-LD bubble entry date)
4.64 LD Feb. 172017 BW 70 m  < 10 LD Feb. 9, radar/NHATS target - DOU
3.6   LD Feb. 242017 CP1 41 m  < 10 LD Feb. 15, NEW, uncertainty +/- 2.7833 hours - MPEC
2.4   LD Feb. 232017 BY93 81 m  < 10 LD Feb. 21, uncertainty +/- 1.8167 hours, risk - DOU
2.7   LD March 22012 DR32 41 m  < 10 LD Feb. 28, uncertainty +/- 4.1333 hours
8.34 LD March 161998 SL36 309 m  < 10 LD March 14
7.63 LD March 262015 TC25 4 m  < 10 LD March 17, radar/NHATS target, risk
4.57 LD April 192014 JO25 812 m  < 10 LD April 18
8.0   LD May 292017 CS 429 m  < 10 LD May 26, uncertainty +/- 3.5000 hours, risk - 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 5 February '17

The MPC's NEO Confirmation Page has 90 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 90 objects listed. Of these, 51 were "one nighters." So far The Tracking News has counted a total of 125 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 5 February '17

Minor Planet Electronic Circulars

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


MPEC 2017-C64 - "20:52 UT" - 2017 CR1


MPEC 2017-C63 - "20:46 UT" - 2017 CQ1


MPEC 2017-C62 - "20:42 UT" - 2017 CP1


MPEC 2017-C61 - "20:39 UT" - 2017 CO1


MPEC 2017-C60 - "20:35 UT" - 2017 CN1


MPEC 2017-C59 - "20:31 UT" - 2017 CM1


MPEC 2017-C58 - "20:28 UT" - 2017 CL1


MPEC 2017-C57 - "20:24 UT" - 2017 CK1


MPEC 2017-C56 - "20:20 UT" - 2017 CJ1


MPEC 2017-C55 - "20:17 UT" - 2017 CH1


MPEC 2017-C54 - "20:13 UT" - 2017 CG1


MPEC 2017-C53 - "20:09 UT" - 2017 BN123


MPEC 2017-C52 - "20:06 UT" - 2017 BM123


MPEC 2017-C51 - "20:02 UT" - 2017 BL123


MPEC 2017-C50 - "19:58 UT" - 2017 BK123


<< DOU on 5 Feb. '17 >>  MPEC 2017-C49 - "13:05 UT" - Daily Orbit Update

Observers  on 5 February '17

A total of 33 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 21 in MPEC 2017-C49 -- 2017 BW32, 2017 BR93, 2017 BN93, 2017 BN31, 2017 BM30, 2017 BH32, 2017 BF30, 2017 BF3, 2017 BE92, 2017 AT4, 2017 AH3, 2017 AB17, 2017 AB14, 2016 YE3, 2016 TJ18, 2015 JA2, 2014 YN44, 2011 CX7, 2005 EY169, 66959, 163683
T05ATLAS Haleakala in Hawaii, 10 in MPEC 2017-C49 -- 2017 BW, 2016 UU80, 2014 AD17, 2001 QE34, 54789, 153951, 136635, 11398, 10165, 5131
300Bisei Spaceguard Center in Japan, 1 in MPEC 2017-C55 -- 2017 CH1
Q68Blue Mountains Obs. in New South Wales, 1 in MPEC 2017-C49 -- 106589
160Castelmartini Obs. in Italy, 14 in MPEC 2017-C49 -- 2016 UU80, 2014 AD17, 2001 QE34, 54789, 24445, 203217, 138846, 136635, 7341, 7088, 5693, 5131, 1862, 433
703Catalina Sky Survey in Arizona, 1 in MPEC 2017-C55 -- 2017 CH1
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 11 in MPECs 2017-C49 & 2017-C56 -- 2017 CJ1, 2017 BS93, 2017 BS6, 2017 BS31, 2017 BM32, 2017 BL6, 2017 BG32, 2017 BG29, 2017 AV3, 2016 VY5, 2016 CO246
Z99Clixby Obs. in England, 2 in MPECs 2017-C62 & 2017-C63 -- 2017 CQ1, 2017 CP1
F652Lothar Kurtze in Germany via Faulkes Telescope North in Hawaii, 1 in MPEC 2017-C49 -- 2017 BF29
J95Great Shefford Obs. in England, 4 in MPECs 2017-C52, 2017-C59, 2017-C62 & 2017-C64 -- 2017 CR1, 2017 CP1, 2017 CM1, 2017 BM123
Q62|Sergio Foglia in Italy via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2017-C56 -- 2017 CJ1
W85LCOGT Cerro Tololo A in Chile, 1 in MPEC 2017-C49 -- 2006 HW50
W86LCOGT Cerro Tololo B in Chile, 4 in MPECs 2017-C51, 2017-C58, 2017-C60 & 2017-C61 -- 2017 CO1, 2017 CN1, 2017 CL1, 2017 BL123
T04LCOGT Haleakala OGG B#2 in Hawaii, 2 in MPEC 2017-C49 -- 2017 BS32, 2017 BQ6
K91LCOGT Sutherland A in South Africa, 1 in MPEC 2017-C49 -- 2006 HW50
K92LCOGT Sutherland B in South Africa, 1 in MPEC 2017-C49 -- 2017 BY93
K93LCOGT Sutherland C in South Africa, 1 in MPEC 2017-C52 -- 2017 BM123
H01Magdalena Ridge Obs. (MRO) in New Mexico, 5 in MPECs 2017-C53, 2017-C55, 2017-C60, 2017-C63 & 2017-C64 -- 2017 CR1, 2017 CQ1, 2017 CN1, 2017 CH1, 2017 BN123
568_Marco Micheli on Mauna Kea in Hawaii, 8 in MPECs 2017-C49, 2017-C50, 2017-C51, 2017-C52, 2017-C58, 2017-C59, 2017-C60 & 2017-C61 -- 2017 CO1, 2017 CN1, 2017 CM1, 2017 CL1, 2017 BM123, 2017 BL123, 2017 BK123, 2006 HW50
G96Mt. Lemmon Survey (MLS) in Arizona, 29 in MPECs 2017-C49, 2017-C52, 2017-C53, 2017-C54, 2017-C55, 2017-C56, 2017-C57, 2017-C62, 2017-C63 & 2017-C64 -- 2017 CR1, 2017 CQ1, 2017 CP1, 2017 CK1, 2017 CJ1, 2017 CH1, 2017 CG1, 2017 BV6, 2017 BP31, 2017 BO93, 2017 BN123, 2017 BM93, 2017 BM123, 2017 BE29, 2017 AF5, 2016 DP, 2015 BY310, 2011 QP96, 2009 FR30, 2008 CA6, 2000 DO1, 2000 CE59, 438955, 38086, 310842, 307070, 153951, 5693, 1862
J43Oukaimeden Obs. in Morocco, 1 in MPEC 2017-C49 -- 317255
F51Pan-STARRS 1 (PS1) in Hawaii, 33 in MPECs 2017-C49, 2017-C50, 2017-C51, 2017-C52, 2017-C53, 2017-C55, 2017-C58, 2017-C59, 2017-C60, 2017-C61, 2017-C63 & 2017-C64 -- 2017 CR1, 2017 CQ1, 2017 CO1, 2017 CN1, 2017 CM1, 2017 CL1, 2017 CH1, 2017 BN123, 2017 BM123, 2017 BL123, 2017 BK123, 2017 BH29, 2017 BC30, 2017 BB94, 2016 YX7, 2016 VQ5, 2013 KY1, 2013 CL118, 2013 BM76, 2006 HW50, 2000 DO1, 1998 HK1, 420302, 405427, 381906, 380981, 36017, 319988, 274138, 252091, 217807, 217683, 1916
104San Marcello Pistoiese Obs. in Italy, 2 in MPECs 2017-C63 & 2017-C64 -- 2017 CR1, 2017 CQ1
H36Sandlot Obs. in Kansas, 1 in MPEC 2017-C55 -- 2017 CH1
204Schiaparelli Obs. in Italy, 11 in MPECs 2017-C49 & 2017-C62 -- 2017 CP1, 2017 AZ13, 2017 AT19, 2017 AO13, 2017 AN19, 2017 AK3, 2016 QN11, 2015 BY310, 2012 BX13, 2007 WY3, 2001 QE34
Y28Sertao de Itaparica Obs. in Brazil, 1 in MPEC 2017-C49 -- 2017 BO32
G40!M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2017-C49 -- 2017 BL30
Y00SONEAR in Brazil, 1 in MPEC 2017-C49 -- 40267
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2017-C52 -- 2017 BM123
291Spacewatch 1.8m telescope in Arizona, 12 in MPECs 2017-C49, 2017-C50, 2017-C51, 2017-C52, 2017-C58, 2017-C59, 2017-C60 & 2017-C61 -- 2017 CS, 2017 CO1, 2017 CN1, 2017 CM1, 2017 CL1, 2017 BY93, 2017 BM123, 2017 BL30, 2017 BL123, 2017 BK123, 2017 AP20, 2010 HZ108
W34Squirrel Valley Obs. in North Carolina, 2 in MPEC 2017-C49 -- 2017 BL30, 2012 BX13
I52Steward Obs. Mt. Lemmon Station in Arizona, 8 in MPECs 2017-C53, 2017-C54, 2017-C55, 2017-C56, 2017-C57, 2017-C62, 2017-C63 & 2017-C64 -- 2017 CR1, 2017 CQ1, 2017 CP1, 2017 CK1, 2017 CJ1, 2017 CH1, 2017 CG1, 2017 BN123
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 6 in MPEC 2017-C49 -- 2017 BW30, 2017 BO32, 2017 BK30, 2017 BG92, 2017 BE30, 2017 BD6
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 5 February '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 CH1JPL Sentry22352037-209571.7e-06-2.23-2.640JPL: "Analysis based on 31 observations spanning 20.796 days (2017-Jan-15.64059 to 2017-Feb-05.436495)." Diameter approximately 0.923 km. from mean, weighted H=17.8.
2017 CSJPL Sentry1730210611.3e-10-7.56-7.560JPL: "Analysis based on 18 observations spanning 15.799 days (2017-Jan-20.56923 to 2017-Feb-05.36792)." Diameter approximately 0.430 km. from mean, weighted H=19.5.
2017 BY93JPL Sentry17302046-2072175.9e-06-3.96-4.510JPL: "Analysis based on 21 observations spanning 9.8652 days (2017-Jan-26.49954 to 2017-Feb-05.36475)." Diameter approximately 0.082 km. from mean, weighted H=23.1.
2017 BG92NEODyS21002045-2116312.74e-05-6.44-6.60NEODyS: "Based on 11 optical observations (of which 0 are rejected as outliers) from 2017-01-28.400 to 2017-02-02.418."
JPL Sentry17302045-2110251.9e-05-6.68-7.060JPL: "Analysis based on 10 observations spanning 5.0184 days (2017-Jan-28.39899 to 2017-Feb-02.41736)." Diameter approximately 0.006 km. from mean, weighted H=28.6.
2017 BV32JPL Sentry1810R E M O V E DJPL: Risk listing removed at 1754 UTC.
2017 BO32JPL Sentry17302048-2094561.1e-05-4.96-5.650JPL: "Analysis based on 18 observations spanning 6.7060 days (2017-Jan-29.39721 to 2017-Feb-05.103182)." Diameter approximately 0.041 km. from mean, weighted H=24.6.
2017 BW30NEODyS21002072-2115135.4e-08-6.94-7.420NEODyS: "Based on 48 optical observations (of which 1 are rejected as outliers) from 2017-01-28.542 to 2017-02-02.538."
2017 BL30NEODyS21002029-2111298.06e-04-1.85-1.851NEODyS: "Based on 85 optical observations (of which 0 are rejected as outliers) from 2017-01-28.379 to 2017-02-05.281."
JPL Sentry18342029-2052111.1e-03-1.74-1.741JPL: "Analysis based on 85 observations spanning 7.9022 days (2017-Jan-28.37792 to 2017-Feb-05.28008)." Diameter approximately 0.071 km. from mean, weighted H=23.4.
2017 BK30NEODyS21002085-210645.72e-07-7.52-7.820NEODyS: "Based on 33 optical observations (of which 3 are rejected as outliers) from 2017-01-26.449 to 2017-02-04.013."
JPL Sentry1730208521.4e-07-8.11-8.260JPL: "Analysis based on 33 observations spanning 8.5641 days (2017-Jan-26.44804 to 2017-Feb-04.012101)." Diameter approximately 0.012 km. from mean, weighted H=27.2.
2017 BF30JPL Sentry1730R E M O V E DJPL: Risk listing removed at 1704 UTC.
2017 BE30NEODyS2100210021.28e-07-7.60-7.670NEODyS: "Based on 25 optical observations (of which 0 are rejected as outliers) from 2017-01-27.531 to 2017-02-02.408."
JPL Sentry1730210011.1e-07-7.69-7.690JPL #2 for the day: "Analysis based on 25 observations spanning 5.8769 days (2017-Jan-27.53064 to 2017-Feb-02.407498)." Diameter approximately 0.018 km. from mean, weighted H=26.3.
2017 BD6NEODyS21002083-209341.79e-08-9.69-10.020NEODyS: "Based on 20 optical observations (of which 0 are rejected as outliers) from 2017-01-26.387 to 2017-02-02.554."
JPL Sentry1810209011.0e-09-10.95-11.00JPL #2 for the day: "Analysis based on 18 observations spanning 7.1671 days (2017-Jan-26.38633 to 2017-Feb-02.553459)." Diameter approximately 0.007 km. from mean, weighted H=28.6.

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 5 February '17

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

2305Updated Traffic Report
2235Noted that JPL Sentry has posted 2017 CH1 as an impact risk - see above
2100Noted that NEODyS has updated its 2017 BD6 risk assessment - see above
Noted that NEODyS has updated its 2017 BE30 risk assessment - see above
Noted that NEODyS has updated its 2017 BG92 risk assessment - see above
Noted that NEODyS has updated its 2017 BK30 risk assessment - see above
Noted that NEODyS has updated its 2017 BL30 risk assessment - see above
Noted that NEODyS has updated its 2017 BW30 risk assessment - see above
Grabbed MPEC 2017-C59 - 2017 CM1 - see above
Grabbed MPEC 2017-C60 - 2017 CN1 - see above
Grabbed MPEC 2017-C61 - 2017 CO1 - see above
Grabbed MPEC 2017-C62 - 2017 CP1 - see above
Grabbed MPEC 2017-C63 - 2017 CQ1 - see above
Grabbed MPEC 2017-C64 - 2017 CR1 - see above
2032Grabbed MPEC 2017-C50 - 2017 BK123 - see above
Grabbed MPEC 2017-C51 - 2017 BL123 - see above
Grabbed MPEC 2017-C52 - 2017 BM123 - see above
Grabbed MPEC 2017-C53 - 2017 BN123 - see above
Grabbed MPEC 2017-C54 - 2017 CG1 - see above
Grabbed MPEC 2017-C55 - 2017 CH1 - see above
Grabbed MPEC 2017-C56 - 2017 CJ1 - see above
Grabbed MPEC 2017-C57 - 2017 CK1 - see above
Grabbed MPEC 2017-C58 - 2017 CL1 - see above
1834Noted that JPL Sentry has updated its 2017 BL30 risk assessment - see above
1810Noted that JPL Sentry has reposted 2017 BD6 as an impact risk - see above
Noted that JPL Sentry has removed 2017 BV32 as an impact risk - see above
1730Noted that JPL Sentry has updated its 2017 BE30 risk assessment - see above
Noted that JPL Sentry has removed 2017 BF30 as an impact risk - see above
Noted that JPL Sentry has updated its 2017 BG92 risk assessment - see above
Noted that JPL Sentry has updated its 2017 BK30 risk assessment - see above
Noted that JPL Sentry has updated its 2017 BO32 risk assessment - see above
Noted that JPL Sentry has updated its 2017 BY93 risk assessment - see above
Noted that JPL Sentry has updated its 2017 CS risk assessment - see above
1636Noted that JPL Sentry has removed 2017 BD6 as an impact risk - see above
Noted that JPL Sentry has updated its 2017 BE30 risk assessment - see above
Grabbed MPEC 2017-C49 - Daily Orbit Update - see above