Contents on 19 February '18
- Traffic Report -- eight objects
- IAU Minor Planet Center
- Observers -- seventeen observers
- Impact Risk Monitoring -- two objects
Asteroid/Comet Connection (A/CC) Resources:
- Consolidated Risk Tables - the CRT page
Of 914 risk-listed objects, 51 have had news in the last 31 days. Updated at 2009 UTC on 19 Feb.
- Ephemerides for risk-listed objects & close passers
- News archive (old) & news image catalog (discontinued)
- Object Links - mainly for radar targets & close passers (mostly discontinued)
- Observing Campaigns (old)
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 19 February '18
Eight objects reported inside ten LD
Eight transient natural objects are reported inside ten lunar distances (LD) of Earth today. Nearest is newly announced risk-listed 2018 DB, which flies in from 7.15 to 3.87 LD, while intruder 2018 CD3 heads out from 5.40 to 7.06 LD.
|Neighborhood Traffic - sorted by Earth passage distance, grouped by 1.0, 2.41, 5.0 & 10.0 LD boundaries|
|Earth passage||I D||~Size||Distance today||Inside ten LD||Notes|
|0.92 LD Feb. 15||2018 CD3||6 m||5.40 to 7.06 LD||Feb. 9 - 21||intruder, NHATS target|
|2.23 LD Feb. 15||2018 CU2||9 m||7.90 to 9.81 LD||Feb. 10 - 20|
|2.25 LD tomorrow||2018 DB||10 m||3.87 from 7.15 LD||yesterday - Feb. 23||NEW, risk - MPEC|
|3.7 LD Feb. 24*||2017 DR109||10 m||7.9 from 9.4 LD||yesterday - March 1||EPU +/- 30 mins.*, NHATS target|
|5.36 LD Feb. 27||2018 CU14||9 m||9.05 from 9.86 LD||yesterday - March 8||NEW - MPEC|
|6.08 LD today||2018 CP2||48 m||6.08 LD||Feb. 16 - 22||Earth closest at 1833 UTC|
|6.66 LD Jan. 15||2018 AV2||6 m||8.50 to 8.61 LD||Nov. 10 - March 2||NHATS target, natural?|
|9.26 LD tomorrow||2018 CJ||64 m||9.32 from 10.30 LD||today - Feb. 21||enters ten LD|
This report was generated at 2038 UTC with the discoveries of inbound objects 2018 DC (MPEC) and 2018 CU14 (MPEC), and of approaching 2018 DB (MPEC). Today's DOU MPEC has follow-up for departed intruders 2018 CB and 2018 AH (21.11 days added to its previous 24.87-day observing arc), astrometry from January for 2018 BS6, and, from November 2016, additional observation of intruder 2016 VA (1.76 hours added to its 14.26-hour arc).
|Approaching Traffic - sorted by 10-LD bubble entry date|
|Earth passage||I D||~Size||Distance today||Inside ten LD||Notes|
|5.17 LD Feb. 24||2018 CE14||25 m||11.84 from 13.95 LD||tomorrow - Feb. 28||NHATS target|
|3.76 LD March 7||2017 VR12||273 m||21.78 from 23.13 LD||Feb. 28 - March 13||radar/NHATS target|
|9.3 LD March 3*||2018 DC||40 m||23.6 from 25.3 LD||March 1 - 5||NEW, EPU +/- 32 mins.* - MPEC|
|6.9 LD March 10*||2015 DK200||26 m||34.1 from 36.0 LD||March 6 - 14||EPU +/- 23.45 hours*, NHATS target|
|* EPU = Earth passage uncertainty|
Reading: The Georgia Institute of Technology has a news item about using asteroids and meteorites to discover "what molecules originally existed in our solar system [as a starting point from which] to reconstruct the complex pathway that got life started on Earth," noting that initially "[we] may not even know what we should be looking for." And Gizmodo has an article about how the successful first launch of the SpaceX Falcon Heavy rocket signals a significant increase in the number of asteroids that potentially could be reached for a profitable return on mining. Both reports come out of the annual meeting of the American Association for the Advancement of Science.
Notes: Ten times the distance to the Moon (ten LD) has no astronomical importance but is a useful boundary for reporting about transient natural objects that approach our planet's 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 temporal distances are derived by A/CC from JPL Horizons data. "LD*" indicates some uncertainty in object passage time and distance. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.
NEOCP Activity on 19 February '18
The MPC's NEO Confirmation Page has 21 listings
When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 21 objects listed. Of these, seven were "one nighters." So far The Tracking News has counted a total of 31 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 19 February '18
Minor Planet Electronic Circulars
As of last check at 2358 UTC, there have been five MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- MPEC 2018-D22 time-stamped "13:04 UT" - Daily Orbit Update - see below
- MPEC 2018-D23 time-stamped "18:08 UT" - 2018 CU14 - see below
- MPEC 2018-D24 time-stamped "18:11 UT" - 2018 DA - see below
- MPEC 2018-D25 time-stamped "18:18 UT" - 2018 DB - see below
- MPEC 2018-D26 time-stamped "18:21 UT" - 2018 DC
MPEC 2018-D26 - "18:21 UT" - 2018 DC
- K18D00C 2018 DC (Earth MOID=5.7 LD, H=24.6 ~41m) was picked up at 1142 UT on 17 Feb. by the Mt. Lemmon Survey (MLS), observing it at Feb. 17.49-50p3 and 18.48-49p4. This detection was confirmed by Astronomical Research Obs. Westfield (Feb. 18.37-38p3), GINOP-KHK (Feb. 18.97-98p2), and Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) (Feb. 19.21-22p3).
MPEC 2018-D25 - "18:18 UT" - 2018 DB
- K18D00B 2018 DB (risk listed, Earth MOID=1.8 LD, H=27.6 ~10m, close passer) was picked up at 0948 UT on 17 Feb. by MLS, observing it at Feb. 17.41-45p8 and 18.48p4. This detection was confirmed by Holmes/CTIO (Feb. 19.21-22p3).
MPEC 2018-D24 - "18:11 UT" - 2018 DA
- K18D00A 2018 DA (small asteroid, Earth MOID=1.8 LD, H=24.2 ~49m) was picked up at 0945 UT on 17 Feb. by MLS, observing it at Feb. 17.41-45p10 and 18.48-49p3. This detection was confirmed by ARO Westfield (Feb. 18.28p3), ATLAS Haleakala (Feb. 18.53-56p4), GINOP-KHK (Feb. 18.94-95p2), and McCarthy Obs. (Feb. 19.21-22p4).
MPEC 2018-D23 - "18:08 UT" - 2018 CU14
- K18C14U 2018 CU14 (Earth MOID=3.0 LD, H=27.7 ~10m) was picked up at 0949 UT on 12 Feb. by Pan-STARRS 1 (PS1), observing it at Feb. 12.41-44p4. This detection was confirmed by MLS (Feb. 17.43-48p8) and ARO Westfield (Feb. 18.40-42p4).
- Observations of recently (no longer) risk-listed objects
- K18C00B 2018 CB (small asteroid, arc=6 days, H=25.9 ~22m, close passer, NHATS target) from Ceccano Obs. (Feb. 9.77p3)
- Observations of close-passing objects
- K18B06S 2018 BS6 (arc=3 days, H=24.9 ~35m) from Pascoli Obs. (Jan. 28.03-04p3)
- K18A00H 2018 AH (Q=4.122 AU, arc=46 days, H=22.5 ~107m) from ARO Westfield (Feb. 18.29-32p3 at V=22.1-3)
- K16V00A 2016 VA (arc=1 day, H=27.6 ~10m) from Great Shefford Obs. (2016 Nov. 1.95-02p21)
- Observation campaigns (NHATS targets, radar support)
- K18A04F 2018 AF4 (arc=36 days, H=23.9 ~56m, NHATS) from MLS (Feb. 18.50-52p4)
-- NHATS target table
- Observations of small asteroids (H>22.0)
- K18C13Z 2018 CZ13 (arc=4 days, H=23.7 ~62m) from Holmes/CTIO (Feb. 12.30-32p3)
- K18C13U 2018 CU13 (arc=8 days, H=26.2 ~19m) from Steward Obs. Mt. Lemmon Station (Feb. 18.51p4)
- K18C03T 2018 CT3 (arc=7 days, H=22.9 ~89m) from Steward Mt. Lemmon Sta. (Feb. 18.53p3)
- K18C02R 2018 CR2 (arc=10 days, H=24.2 ~49m) from Steward Mt. Lemmon Sta. (Feb. 18.54p3)
- Observations of other objects
- K18C02Z 2018 CZ2 (arc=34 days, H=21.3 ~186m) from Steward Mt. Lemmon Sta. (Feb. 18.55p3)
- K18C02Y 2018 CY2 from Steward Mt. Lemmon Sta. (Feb. 18.54p4)
- K18C02T 2018 CT2 (arc=9 days, H=21.4 ~178m) from PS1 (Feb. 18.24-28p4)
- K18B07A 2018 BA7 (arc=15 days, H=18.8 ~589m) from ATLAS Haleakala (Feb. 11.47-51p4)
- K17X62H 2017 XH62 (arc=65 days, H=20.2 ~309m) from MLS (Feb. 18.52-54p4)
- K16CD6L 2016 CL136 (q=0.276 AU, arc=2 opp, H=21.4 ~178m) from UH/Tholen NEO Follow-Up Subaru Telescope (Tholen Subaru) (Jan. 15.67p3 at G=22.25-35 & 16.67p3 at G=22.21-59)
- K15Bo9S 2015 BS509 (arc=2 opp, H=20.2 ~309m) from ATLAS Haleakala (Feb. 11.60-64p4)
- K14L14W 2014 LW14 (arc=2 opp, H=21.5 ~170m) from ARO Westfield (Feb. 18.40-45p3 at V=23.5-7)
- K07L19U 2007 LU19 (arc=2 opp, H=21.4 ~178m) from ATLAS Haleakala (Feb. 11.57-61p4)
- K05C38V 2005 CV38 (arc=3 opp, H=20.2 ~309m) from PS1 (Feb. 18.29-32p3)
- K04C39K 2004 CK39 (q=0.385 AU, Q=4.198 AU, arc=3 opp, H=18.9 ~562m) from Landehen Obs. (Feb. 15.93-97p3)
- K00W28Y 2000 WY28 (arc=4 opp, H=20.0 ~339m) from ARO Westfield (Feb. 18.43-45p3 at V=22.1-2)
- o9935 509935 2009 QL8 from ATLAS Haleakala (Feb. 18.54-57p4)
- o5667 505667 2014 UV33 from ATLAS Haleakala (Feb. 18.56-59p4)
- o5657 505657 2014 SR339 from ATLAS Haleakala (Feb. 11.47-51p8)
- n6861 496861 2000 BE19 from ATLAS Haleakala (Feb. 18.54-58p8)
- l5967 475967 2007 JF22 from the Catalina Sky Survey (CSS) (Dec. 24.42-44p3 & Feb. 7.37-39p4) and ATLAS Mauna Loa (Jan. 16.61-67p8)
- l4425 474425 2002 YF4 from CSS (2017 March 22.47p2 & 2017 May 22.29-30p2)
- V1554 311554 2006 BQ147 from Landehen Obs. (Feb. 15.85-91p4) and ATLAS Haleakala (Feb. 18.44-48p7)
- R6033 276033 2002 AJ129 from Landehen Obs. (Feb. 15.90-92p2) and Contern Obs. (Feb. 17.80-88p9 & 17.96p3)
- R5976 275976 2001 XV10 from ATLAS Haleakala (Feb. 18.23-26p4)
- J0208 190208 2006 AQ from Landehen Obs. (Feb. 15.85-94p5) and ATLAS Haleakala (Feb. 18.51-54p4)
- G2011 162011 Konnohmaru (1994 AB1) from ATLAS Haleakala (Feb. 18.50-54p8)
- 96590 96590 1998 XB from Grorudalen Obs. (Feb. 17.11-12p5)
- 17511 17511 1992 QN from ATLAS Haleakala (Feb. 18.26-29p4)
- 06053 6053 1993 BW3 from Landehen Obs. (Feb. 15.84-91p4) and ATLAS Haleakala (Feb. 18.45-48p4)
Observers on 19 February '18
Seventeen observers appear in today's MPECs.
|Code||Observer / observatory|
|H21||Astronomical Research Obs. Westfield in Illinois, 6 in MPECs 2018-D22, 2018-D23, 2018-D24 & 2018-D26 -- 2018 DC, 2018 DA, 2018 CU14, 2018 AH, 2014 LW14, 2000 WY28|
|T05||ATLAS Haleakala in Hawaii, 14 in MPECs 2018-D22 & 2018-D24 -- 2018 DA, 2018 BA7, 2015 BS509, 2007 LU19, 509935, 505667, 505657, 496861, 311554, 275976, 190208, 17511, 162011, 6053|
|T08||ATLAS Mauna Loa in Hawaii, 1 in MPEC 2018-D22 -- 475967|
|703||Catalina Sky Survey (CSS) in Arizona, 2 in MPEC 2018-D22 -- 475967, 474425|
|470||Ceccano Obs. in Italy, 1 in MPEC 2018-D22 -- 2018 CB|
|807|||Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 3 in MPECs 2018-D22, 2018-D25 & 2018-D26 -- 2018 DC, 2018 DB, 2018 CZ13|
|K26||Contern Obs. in Luxembourg, 1 in MPEC 2018-D22 -- 276033|
|K88||GINOP-KHK in Hungary, 2 in MPECs 2018-D24 & 2018-D26 -- 2018 DC, 2018 DA|
|J95||Great Shefford Obs. in England, 1 in MPEC 2018-D22 -- 2016 VA|
|238||Grorudalen Obs. in Norway, 1 in MPEC 2018-D22 -- 96590|
|Z43||Landehen Obs., 5 in MPEC 2018-D22 -- 2004 CK39, 311554, 276033, 190208, 6053|
|932||McCarthy Obs. in Connecticut, 1 in MPEC 2018-D24 -- 2018 DA|
|G96||Mt. Lemmon Survey (MLS) in Arizona, 6 in MPECs 2018-D22, 2018-D23, 2018-D24, 2018-D25 & 2018-D26 -- 2018 DC, 2018 DB, 2018 DA, 2018 CU14, 2018 AF4, 2017 XH62|
|F51||Pan-STARRS 1 (PS1) in Hawaii, 3 in MPECs 2018-D22 & 2018-D23 -- 2018 CU14, 2018 CT2, 2005 CV38|
|K63||Pascoli Obs. in Italy, 1 in MPEC 2018-D22 -- 2018 BS6|
|I52||Steward Obs. Mt. Lemmon Station in Arizona, 5 in MPEC 2018-D22 -- 2018 CZ2, 2018 CY2, 2018 CU13, 2018 CT3, 2018 CR2|
|T09||UH/Tholen NEO Follow-Up Subaru Telescope in Hawaii, 1 in MPEC 2018-D22 -- 2016 CL136|
|For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.|
Impact Risk Monitoring on 19 February '18
Notes for Today's Latest Risk Assessments
|2018 DB||JPL Sentry||2008||2055-2082||7||2.342465e-07||-7.74||-7.91||0||JPL: Computed at 12:00 today Pacific time based on 15 observations spanning 1.8079 days (2018-Feb-17.40893 to 2018-Feb-19.21684). Diameter approximately 0.010 km. from weighted mean H=27.60.|
|2018 BL11||NEODyS||1700||2091-2117||61||5.92e-05||-6.10||-6.85||0||NEODyS: "Based on 20 optical observations (of which 0 are rejected as outliers) from 2018-01-24.300 to 2018-01-25.427."|
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 19 February '18
Times are UTC for when items were noted or added by The Tracking News.
|2038||Generated Traffic Report|
|2008||Noted that JPL Sentry has posted 2018 DB as an impact risk - see above|
|1830||Grabbed MPEC 2018-D23 - 2018 CU14 - see above|
Grabbed MPEC 2018-D24 - 2018 DA - see above
Grabbed MPEC 2018-D25 - 2018 DB - see above
Grabbed MPEC 2018-D26 - 2018 DC - see above
|1700||Noted that NEODyS has posted 2018 BL11 as an impact risk - see above|
Grabbed MPEC 2018-D22 - Daily Orbit Update - see above