Contents  on 22 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 22 February '17

Six objects reported inside ten LD

Six minor objects are reported flying less than ten lunar distances (LD) from Earth today. Nearest is NHATS target 2017 DB, which heads off from 2.99 to 4.56 LD. Much further away, newly announced 2017 DV15 is outbound from 8.87 to 9.24 LD.

Earth passage I D ~Size Distance Today  Notes
1.82 LD Feb. 202017 DB 13 m  2.99 to 4.56 LD NHATS target
2.09 LD Feb. 192017 DF 17 m  3.75 to 4.78 LD NHATS target - DOU
2.37 LD tomorrow2017 BY93 82 m  4.61 from 8.62 LD radar target, risk - DOU
3.58 LD Feb. 242017 CP1 41 m  3.87 from 4.36 LD radar/NHATS target - DOU
4.63 LD Feb. 172017 BW 69 m  7.15 to 8.02 LD radar/NHATS target - DOU
8.76 LD yesterday2017 DV15 31 m  8.87 to 9.24 LD NEW - MPEC, DOU

This report was generated at 1956 UTC with new discoveries 2017 DV15 (MPEC, DOU) and already departed 2017 DS15 (MPEC), which went past us at 6.51 LD on February 13th. Today's DOU MPEC has the recovery of distant 2001 FE90, last observed by radar and optically in 2009, and has follow-up for inbound 2017 BY93 and 2017 CP1, outbound 2017 DF and 2017 BW, approaching 2017 CS, and departed NHATS targets 2017 CF32 and 2017 AG5, also a radar target.

Approaching (sorted by 10-LD bubble entry date)
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, radar target
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, radar target
7.9   LD May 292017 CS 437 m  < 10 LD May 26, uncertainty +/- 22 mins. - 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. "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 22 February '17

The MPC's NEO Confirmation Page has 82 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 82 objects listed. Of these, 46 were "one nighters." So far The Tracking News has counted a total of 95 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 22 February '17

Minor Planet Electronic Circulars

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


<< DOU on 22 Feb. '17 >>  MPEC 2017-D33 - "13:50 UT" - Daily Orbit Update


MPEC 2017-D32 - "04:28 UT" - 2017 DX15


MPEC 2017-D31 - "01:14 UT" - 2017 DV15


MPEC 2017-D30 - "01:10 UT" - 2017 DU15


MPEC 2017-D29 - "00:58 UT" - 2017 DS15


MPEC 2017-D28 - "00:54 UT" - 2017 DP15


MPEC 2017-D27 - "00:49 UT" - 2017 DT15


MPEC 2017-D26 - "00:45 UT" - 2017 DR15


MPEC 2017-D25 - "00:41 UT" - 2017 DQ15

Observers  on 22 February '17

A total of 43 observers appear in today's MPECs.

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 1 in MPEC 2017-D31 -- 2017 DV15
H21Astronomical Research Obs. Westfield in Illinois, 23 in MPECs 2017-D28, 2017-D29 & 2017-D33 -- 2017 DS15, 2017 DP15, 2017 CP1, 2017 CG1, 2017 BY93, 2017 BX6, 2017 BU31, 2017 BQ91, 2017 BQ31, 2017 BO3, 2017 BM123, 2017 BL30, 2017 BK92, 2017 BD29, 2017 AP20, 2017 AF5, 2017 AC5, 2016 YU10, 2016 YM1, 2016 XH2, 2016 XD1, 2016 UE101, 2016 DP
T05ATLAS Haleakala in Hawaii, 11 in MPECs 2017-D31 & 2017-D33 -- 2017 DV15, 2017 DE, 96590, 40267, 34613, 11398, 5693, 5131, 4179, 3103, 1627
T08ATLAS Mauna Loa in Hawaii, 6 in MPEC 2017-D33 -- 2011 WO41, 11398, 5693, 4179, 3103, 1627
300Bisei Spaceguard Center in Japan, 3 in MPECs 2017-D26, 2017-D27 & 2017-D31 -- 2017 DV15, 2017 DT15, 2017 DR15
160Castelmartini Obs. in Italy, 7 in MPEC 2017-D33 -- 2017 DE, 2016 NL15, 2001 QE34, 96590, 443103, 347813, 12538
703Catalina Sky Survey (CSS) in Arizona, 14 in MPEC 2017-D33 -- 2017 DD, 2017 AP20, 2016 UU80, 2016 QC84, 2014 DH23, 2013 GL8, 2012 BB124, 420286, 40267, 388838, 36017, 25916, 11398, 1916
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2017-D25 -- 2017 DQ15
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2017-D31 -- 2017 DV15
958Dax Obs. in France, 3 in MPECs 2017-D26, 2017-D27 & 2017-D31 -- 2017 DV15, 2017 DT15, 2017 DR15
F652Lothar Kurtze in Germany via Faulkes Telescope North in Hawaii, 2 in MPEC 2017-D33 -- 2017 CP1, 2017 BW
E10*program code "*" (19) via Faulkes Telescope South in New South Wales, 1 in MPEC 2017-D33 -- 2017 BL30
J95Great Shefford Obs. in England, 2 in MPECs 2017-D27 & 2017-D29 -- 2017 DT15, 2017 DS15
H15ISON New Mexico Obs. in New Mexico, 1 in MPEC 2017-D33 -- 5653
Q60ISON Siding Spring Obs. in New South Wales, 1 in MPEC 2017-D33 -- 193178
H06iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2017-D33 -- 2017 BL30
Q62|Sergio Foglia in Italy via iTelescope Obs. Siding Spring in New South Wales, 2 in MPECs 2017-D31 & 2017-D33 -- 2017 DV15, 2008 CA6
246KLENOT in the Czech Republic, 1 in MPEC 2017-D33 -- 469356
W85LCOGT Cerro Tololo A in Chile, 1 in MPEC 2017-D25 -- 2017 DQ15
W86LCOGT Cerro Tololo B in Chile, 2 in MPECs 2017-D25 & 2017-D33 -- 2017 DQ15, 2008 CA6
Q63LCOGT Siding Spring A in New South Wales, 1 in MPEC 2017-D33 -- 2017 BY93
Z21LCOGT Tenerife Aqawan A#1 in the Canary Islands, 1 in MPEC 2017-D26 -- 2017 DR15
K38M57 Obs. in Italy, 1 in MPEC 2017-D33 -- 2017 CF32
C94MASTER-II Tunka in Russia, 1 in MPEC 2017-D33 -- 34613
5682David Tholen's team on Mauna Kea in Hawaii, 2 in MPECs 2017-D26 & 2017-D32 -- 2017 DX15, 2017 DR15
474Mt. John Obs. in New Zealand, 3 in MPECs 2017-D25, 2017-D30 & 2017-D31 -- 2017 DV15, 2017 DU15, 2017 DQ15
G96Mt. Lemmon Survey (MLS) in Arizona, 13 in MPECs 2017-D26, 2017-D27, 2017-D28 & 2017-D33 -- 2017 DT15, 2017 DR15, 2017 DP15, 2017 DC, 2017 CY31, 2014 DH23, 2008 EC69, 370702, 307070, 265482, 205378, 198752, 7335
F51Pan-STARRS 1 (PS1) in Hawaii, 38 in MPECs 2017-D25, 2017-D26, 2017-D27, 2017-D29, 2017-D30, 2017-D31, 2017-D32 & 2017-D33 -- 2017 DX15, 2017 DV15, 2017 DU15, 2017 DT15, 2017 DS15, 2017 DR15, 2017 DQ15, 2017 CN32, 2017 BE92, 2017 AG5, 2013 DQ9, 2010 GA34, 2005 TF, 2001 FE90, 1996 FS1, 85490, 481543, 471240, 420187, 386298, 370702, 361538, 317212, 315020, 288914, 276397, 235086, 190758, 190161, 18109, 175189, 162882, 154652, 152679, 4954, 4055, 1862, 719
K63Pascoli Obs. in Italy, 2 in MPECs 2017-D26 & 2017-D27 -- 2017 DT15, 2017 DR15
B49Paus Obs. in Spain, 1 in MPEC 2017-D31 -- 2017 DV15
W25RMS Obs., 2 in MPECs 2017-D27 & 2017-D31 -- 2017 DV15, 2017 DT15
104San Marcello Pistoiese Obs. in Italy, 4 in MPECs 2017-D27, 2017-D29, 2017-D30 & 2017-D31 -- 2017 DV15, 2017 DU15, 2017 DT15, 2017 DS15
H36Sandlot Obs. in Kansas, 5 in MPECs 2017-D26, 2017-D27, 2017-D29, 2017-D30 & 2017-D33 -- 2017 DU15, 2017 DT15, 2017 DS15, 2017 DR15, 2017 BL30
A29Santa Maria a Monte Obs. in Italy, 3 in MPECs 2017-D27, 2017-D31 & 2017-D33 -- 2017 DV15, 2017 DT15, 2008 CA6
204Schiaparelli Obs. in Italy, 1 in MPEC 2017-D33 -- 2017 DV15
W887program code 7 via Slooh.com Chile Obs. in Chile, 1 in MPEC 2017-D33 -- 2017 AC5
Y00SONEAR in Brazil, 2 in MPECs 2017-D31 & 2017-D33 -- 2017 DV15, 2017 CP1
587Sormano Obs. in Italy, 4 in MPECs 2017-D26, 2017-D27, 2017-D29 & 2017-D30 -- 2017 DU15, 2017 DT15, 2017 DS15, 2017 DR15
691Spacewatch 0.9m telescope in Arizona, 12 in MPECs 2017-D26, 2017-D27, 2017-D29 & 2017-D33 -- 2017 DT15, 2017 DS15, 2017 DR15, 2017 CS, 2017 BZ6, 2017 BS31, 2017 BL6, 2016 YM1, 2016 TA56, 2015 PQ291, 2012 UR136, 364136
291Spacewatch 1.8m telescope in Arizona, 8 in MPECs 2017-D29, 2017-D30, 2017-D32 & 2017-D33 -- 2017 DX15, 2017 DU15, 2017 DS15, 2016 PO38, 2015 FS332, 2014 UR116, 2008 XB1, 2002 JY8
I93St. Pardon de Conques Obs. in France, 4 in MPECs 2017-D26, 2017-D27, 2017-D29 & 2017-D30 -- 2017 DU15, 2017 DT15, 2017 DS15, 2017 DR15
I52Steward Obs. Mt. Lemmon Station in Arizona, 13 in MPECs 2017-D26, 2017-D28, 2017-D29, 2017-D30, 2017-D32 & 2017-D33 -- 2017 DX15, 2017 DU15, 2017 DS15, 2017 DR15, 2017 DP15, 2017 DF, 2017 DE, 2017 DD, 2017 CJ1, 2017 BT, 2017 BL92, 2016 YV8, 2008 CA6
C51WISE in Earth polar orbit, 4 in MPEC 2017-D33 -- 2017 CM32, 345646, 162149, 138846
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 22 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 BL30JPL Sentry16302029-205247.4e-06-3.87-3.880JPL: "Analysis based on 216 observations spanning 24.718 days (2017-Jan-28.37792 to 2017-Feb-22.09611)." Diameter approximately 0.073 km. from mean, weighted H=23.3.

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 22 February '17

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

1956Generated Traffic Report
1630Noted that JPL Sentry has updated its 2017 BL30 risk assessment - see above
1604Grabbed MPEC 2017-D33 - Daily Orbit Update - see above
0510Grabbed MPEC 2017-D32 - 2017 DX15 - see above
0135Grabbed MPEC 2017-D28 - 2017 DP15 - see above
Grabbed MPEC 2017-D29 - 2017 DS15 - see above
Grabbed MPEC 2017-D30 - 2017 DU15 - see above
Grabbed MPEC 2017-D31 - 2017 DV15 - see above
0055Grabbed MPEC 2017-D25 - 2017 DQ15 - see above
Grabbed MPEC 2017-D26 - 2017 DR15 - see above
Grabbed MPEC 2017-D27 - 2017 DT15 - see above