Critical-list minor planet

{{Short description|Numbered minor planet with uncertain position and orbit}}{{Use dmy dates|date=July 2020}}

A critical-list minor planet (critical list numbered object or critical object) is a numbered minor planet for which existing measurements of the orbit and position are especially in need of improvement.

The IAU's Minor Planet Center (MPC) regularly publishes a list of these critical objects in their Minor Planet Electronic Circular. The list typically contains asteroids that have been observed at a small number of apparitions, especially on opposition, or that have not been adequately observed for more than 10 years, while other observatories create their own, customized lists. The MPC also lists currently observable critical objects on their website, providing differently formatted lists of orbital elements to the worldwide astrometric community.

Lowell Observatory publishes their own critical list, distinctly different from the MPC, instead focusing on objects with high ephemeris uncertainty. Specifically, objects with computed ephemeris uncertainty greater than 2 arcseconds over the next 10 years, and objects whose orbits degrade significantly when temporally isolated observations are ignored, are included in the list.

Minor Planet Center List

{{As of|2024|12}}, the MPC includes 650 objects in their observable critical list. The following list contains all critical objects within the first 100,000 numbered minor planets, the full list can be found in the MPL website:

1915 Quetzálcoatl
{{LoMP|2135|{{mp|(2135) Aristaeus}}}}
{{LoMP|2340|{{mp|(2340) Hathor|}}}}
{{LoMP|3362|{{mp|(3362) Khufu|}}}}
{{mpl|(3753) Cruithne|}}
{{mpl|(5335) Damocles|}}
{{mpl|(5381) Sekhmet|}}
{{mpl|(5590) 1990 VA|}}
{{mpl|(7066) Nessus|}}
{{mpl|(7236) 1987 PA|}}
{{mpl|(7822) 1991 CS|}}
{{mpl|(10370) Hylonome}}
{{LoMP|11885|{{mp|(11885) Summanus}}}}
{{mpl|(14827) Hypnos|}}
{{mpl|(15504) 1999 RG|33}}
{{mpl|(15788) 1993 SB|}}
{{mpl|(15807) 1994 GV|9}}
{{mpl|(15809) 1994 JS|}}
{{mpl|(15810) 1994 JR|1}}
{{mpl|(15820) 1994 TB|}}
{{mpl|(15836) 1995 DA|2}}
{{mpl|(15875) 1996 TP|66}}
{{mpl|(15883) 1997 CR|29}}
{{LoMP|16636|{{mp|(16636) 1993 QP|}}}}
{{mpl|(16684) 1994 JQ|1}}
{{mpl|(19255) 1994 VK|8}}
{{mpl|(19299) 1996 SZ|4}}
{{mpl|(19308) 1996 TO|66}}
{{mpl|(19521) Chaos|}}
{{mpl|(20108) 1995 QZ|9}}
{{mpl|(20161) 1996 TR|66}}
{{LoMP|20255|{{mp|(20255) 1998 FX|2}}}}
{{LoMP|20425|{{mp|(20425) 1998 VD|35}}}}
{{mpl|(20461) Dioretsa}}
{{mpl|(24952) 1997 QJ|4}}
{{mpl|(24978) 1998 HJ|151}}
{{mpl|(26181) 1996 GQ|21}}
{{LoMP|26310|{{mp|(26310) 1998 TX|6}}}}
{{mpl|(26375) 1999 DE|9}}
{{LoMP|26379|{{mp|(26379) 1999 HZ|1}}}}
{{LoMP|26817|{{mp|(26817) 1987 QB|}}}}
{{LoMP|31662| {{mp|(31662) 1999 HP|11}}}}
{{mpl|(32929) 1995 QY|9}}
{{mpl|(33128) 1998 BU|48}}
{{LoMP|35670|{{mp|(35670) 1998 SU|27}}}}
{{mpl|(35671) 1998 SN|165}}
{{LoMP|37117|{{mp|(37117) Narcissus}}}}
{{mpl|(38083) Rhadamanthus}}
{{LoMP|38239|{{mp|(38239) 1999 OR|3}}}}
{{mpl|(40314) 1999 KR|16}}
{{LoMP|41440|{{mp|(41440) 2000 HZ|23}}}}
{{mpl|(42301) 2001 UR|163}}
{{mpl|(45802) 2000 PV|29}}
{{mpl|(48639) 1995 TL|8}}
49036 Pelion
{{mpl|(49673) 1999 RA|215}}
{{LoMP|52387|{{mp|(52387) Huitzilopochtli}}}}
{{mpl|(52747) 1998 HM|151}}
{{mpl|(52760) 1998 ML|14}}
{{mpl|(52975) Cyllarus|}}
{{mpl|(53311) Deucalion|}}
{{LoMP|53409|{{mp|(53409) 1999 LU|7}}}}
{{LoMP|53429|{{mp|(53429) 1999 TF|5}}}}
{{LoMP|54509|{{mp|(54509) YORP|}}}}
{{mpl|(54520) 2000 PJ|30}}
{{mpl|(55576) Amycus|}}
{{mpl|(55637) 2002 UX|25}}
{{mpl|(59358) 1999 CL|158}}
{{mpl|(60454) 2000 CH|105}}
{{mpl|(60458) 2000 CM|114}}
{{mpl|(60620) 2000 FD|8}}
{{mpl|(60621) 2000 FE|8}}
{{mpl|(63252) 2001 BL|41}}
{{mpl|(65407) 2002 RP|120}}
{{LoMP|66253|{{mp|(66253) 1999 GT|3}}}}
{{mpl|(66452) 1999 OF|4}}
{{mpl|(66652) Borasisi|}}
{{LoMP|68347|{{mp|(68347) 2001 KB|67}}}}
{{mpl|(68950) 2002 QF|15}}
{{mpl|(69986) 1998 WW|24}}
{{mpl|(69987) 1998 WA|25}}
{{mpl|(69988) 1998 WA|31}}
{{mpl|(69990) 1998 WU|31}}
{{mpl|(76803) 2000 PK|30}}
{{mpl|(78799) 2002 XW|93}}
{{mpl|(79969) 1999 CP|133}}
{{mpl|(79978) 1999 CC|158}}
{{mpl|(79983) 1999 DF|9}}
{{mpl|(80806) 2000 CM|105}}
{{mpl|(82157) 2001 FM|185}}
{{mpl|(82158) 2001 FP|185}}
{{mpl|(83982) Crantor|}}
{{mpl|(84719) 2002 VR|128}}
{{LoMP|85585|{{mp|(85585) 1998 FG|2}}}}
{{mpl|(85627) 1998 HP|151}}
{{mpl|(85633) 1998 KR|65}}
{{mpl|(85640) 1998 OX|4}}
{{mpl|(85770) 1998 UP|1}}
{{LoMP|85953|{{mp|(85953) 1999 FK|21}}}}
{{mpl|(86047) 1999 OY|3}}
{{LoMP|86450|{{mp|(86450) 2000 CK|33}}}}
{{LoMP|86667|{{mp|(86667) 2000 FO|10}}}}
{{mpl|(87269) 2000 OO|67}}
{{LoMP|88213|{{mp|(88213) 2001 AF|2}}}}
{{mpl|(88267) 2001 KE|76}}
{{mpl|(88268) 2001 KK|76}}
{{mpl|(88269) 2001 KF|77}}
{{mpl|(88611) Teharonhiawako|}}
{{LoMP|89136|{{mp|(89136) 2001 US|16}}}}
{{mpl|(91133) 1998 HK|151}}
{{mpl|(91205) 1998 US|43}}
{{mpl|(91554) 1999 RZ|215}}
{{mpl|(95625) 2002 GX|32}}
{{mpl|(98943) 2001 CC|21}}

References

{{reflist|refs=

{{cite journal

|last1 = Monet |first1 = A. K. B.

|date = December 1994

|title = CCD Astrometry of "Critical List" Minor Planets

|journal = American Astronomical Society Meeting Abstracts

|volume = 185

|page = 43.11

|bibcode = 1994AAS...185.4311M}}

{{cite web

|title = Minor Planet Electronic Circulars – Sample MPECs

|work = Minor Planet Center

|url = https://www.minorplanetcenter.net/iau/services/MPEC.html

|access-date = 4 July 2020}}

{{cite web

|title = Critical Lists of Asteroids

|publisher = Lowell Observatory

|url = https://asteroid.lowell.edu/critlists/legacy/

|access-date = 29 November 2023}}

{{cite web

|title = Observable Critical-List Minor Planets

|work = Minor Planet Center

|url = https://minorplanetcenter.net/iau/Ephemerides/CritList/index.html

|access-date = 30 December 2024}}

{{cite web

|title = Orbital Elements: Critical-List Minor Planets

|work = Minor Planet Center

|url = https://minorplanetcenter.net/iau/Ephemerides/CritList/SoftwareCritList.html

|access-date = 4 July 2020}}

{{cite web

|title = Data Available from the Minor Planet Center – MPCORB.DAT

|work = Minor Planet Center

|date = 26 June 2020

|url = https://minorplanetcenter.net/data

|access-date = 15 August 2023}} ([https://www.minorplanetcenter.net/iau/info/MPOrbitFormat.html doc])

}}

External links

[https://www.minorplanetcenter.net/mpec/J98/J98G21.html MPEC 1998-G21 : CRITICAL-LIST MINOR PLANETS], Minor Planet Circular (1998)
[https://ntrs.nasa.gov/search.jsp?R=19940033930 Asteroid orbit determination using Bayesian probabilities], Karri Muinonen, Edward Bowell (1993)

Category:Minor planets

Critical-list minor planet

Minor Planet Center List

See also

References

External links