C/2001 OG108 (LONEOS)
{{short description|Halley-type comet}}
{{DISPLAYTITLE:C/{{mp|2001 OG|108}} (LONEOS)}}
{{For|other comets of the same name|Comet LONEOS}}
{{Use dmy dates|date=April 2014}}
{{Infobox comet
| name = C/{{mp|2001 OG|108}} (LONEOS)
| discovery_ref = {{r|Abell_2003|French_2002}}
| discoverer = M. E. Van Ness
| discovery_site = Lowell Observatory
(LONEOS)
| discovery_date = 28 July 2001
| designations =
| orbit_ref = {{r|jpldata}}
| epoch = 5 December 2001 (JD 2452248.5)
| observation_arc = 340 days
| obs = 882
| semimajor = 13.300 AU
| perihelion = 0.994 AU
| aphelion = 25.606 AU
| eccentricity = 0.92526
| period = 48.51 years
| inclination = 80.245°
| asc_node = 10.555°
| arg_peri = 116.42°
| tjup = 0.597
| Earth_moid = 0.301 AU
| Jupiter_moid = 0.968 AU
| physical_ref = {{r|jpldata|Knight_2023}}
| dimensions = {{cvt|13.6|±|1.0|km|mi}}
| rotation = {{val|57.2|0.5}} hours
| spectral_type = (V–R) {{=}} {{val|0.46|0.02}}
| albedo = 0.054
| M1 = 13.3
| M2 =
| magnitude =
| last_p = 15 March 2002
| next_p = 7 June 2050 {{r|Horizons2050}}
}}
C/{{mp|2001 OG|108}} (LONEOS) is a Halley-type comet with an orbital period of 48.51 years.{{r|jpldata}} It was discovered on 28 July 2001 by the LONEOS telescope at Lowell Observatory.{{r|French_2002}} Of the short-period comets with known diameters and perihelion inside the orbit of Earth, C/{{mp|2001 OG|108}} is the second largest after Comet Swift–Tuttle.
Orbit
Observations taken in January and February 2002 showed that the "asteroid" had developed a small amount of cometary activity as it approached perihelion.{{r|Abell_2003}} It was subsequently reclassified as a comet.{{r|Abell_2003}} The comet came to perihelion (closest approach to the Sun) on 15 March 2002.{{r|jpldata}} It will come to aphelion in 2026 and the next perihelion passage is calculated to be on 7 June 2050.{{r|Horizons2050}} On 23 March 2147 the comet will pass about {{convert|0.42|AU|e6km LD|abbr=unit}} from Earth{{r|jpldata}} with an uncertainty region of about ±2 million km.{{r|Horizons2147}}
{{anchor|CA}}
| class="wikitable" style="text-align: center; font-size: 0.9em;"
|+C/2001 OG108 (LONEOS) Closest Earth Approach on 2147-Mar-23 11:20 UT{{r|jpldata}} ! Date & time of ! Earth distance ! Sun distance ! Velocity ! Velocity ! Uncertainty ! Reference | ||||||
| 2147-03-23 11:20 ± 13:38 | {{Convert|0.42|AU|e6km e6mi LD|abbr=unit|lk=on}} | {{Convert|1.35|AU|e6km e6mi LD|abbr=unit}} | 40.3 | 35.3 | ± 2 million km | [https://ssd.jpl.nasa.gov/horizons_batch.cgi?batch=1&COMMAND=%272001+OG108%27&START_TIME=%272147-03-23%2011:20%27&STOP_TIME=%272147-03-24%27&STEP_SIZE=%271%20day%27&QUANTITIES=%2719,20,22,39%27 Horizons] |
This comet probably represents the transition between typical Halley-family/long-period comets and extinct comets.{{r|Abell_2003}} Damocloids have been studied as possible extinct cometary candidates due to the similarity of their orbital parameters with those of Halley-family comets.{{r|Abell_2003}}
Physical properties
The comet has a rotational period of 2.38 ± 0.02 days (57.12 hr).{{r|Abell_2003|jpldata}}
In 2003, the comet was estimated to have a mean absolute V magnitude (H) of 13.05 ± 0.10, with an albedo of 0.03, giving an effective radius of {{cvt|8.9|±|0.7|km|mi}}.{{r|Abell_2003}} Using data from Fernandez (2004–2005) JPL lists the comet with an albedo of 0.05 and a diameter of {{cvt|13.6|±|1.0|km|mi}}{{r|jpldata}}
See also
References
{{Reflist|refs=
| author1= P. A. Abell
| author2= Y. R. Fernández
| author3= P. Pravec
| author4= L. M. French
| author5= T. L. Farnham
| author6= M. J. Gaffey
| author7= P. S. Hardersen
| author8= P. Kušnirák
| author9= L. Šarounová
| author10= S. S. Sheppard
| display-authors= 5
| title= Physical Characteristics of Asteroid-like Comet Nucleus C/2001 OG108 (LONEOS)
| conference= 34th Annual Lunar and Planetary Science Conference
| year= 2003
| page= 1253
| bibcode= 2003LPI....34.1253A }}
| author1= L. M. French
| title= Pre-Activity BVRI Colors of High-Inclination Comet C/2001 OG108 (LONEOS)
| journal= American Astronomical Society, DPS Meeting No. 34, #16.01
| volume= 34
| pages= 868
| year= 2002
| bibcode= 2002DPS....34.1601F }}
| title= C/{{mp|2001 OG|108}} (LONEOS) – JPL Small-Body Database Lookup
| url= https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=2001OG108
| website= ssd.jpl.nasa.gov
| publisher= Jet Propulsion Laboratory
| access-date= 18 May 2011 }}
| author1= M. M. Knight
| author2= R. Kokotanekova
| author3= N. H. Samarasinha
| title= Physical and Surface Properties of Comet Nuclei from Remote Observations
| year= 2023
| arxiv= 2304.09309
| class= astro-ph.EP }}
|title=Horizons Batch for 2147-Mar-23 Earth Approach
|publisher=JPL Horizons
|url=https://ssd.jpl.nasa.gov/horizons_batch.cgi?batch=1&COMMAND=%272001+OG108%27&START_TIME=%272147-03-23%2011:20%27&STOP_TIME=%272147-03-24%27&STEP_SIZE=%271%20day%27&QUANTITIES=%2720,39%27
|archive-url=https://web.archive.org/web/20230120204501/https://ssd.jpl.nasa.gov/horizons_batch.cgi?batch=1&COMMAND=%272001+OG108%27&START_TIME=%272147-03-23%2011:20%27&STOP_TIME=%272147-03-24%27&STEP_SIZE=%271%20day%27&QUANTITIES=%2720,39%27
|archive-date=2023-01-20
|url-status=live
|accessdate=2023-01-20}}
|title=Horizons Batch for C/2001 OG108 (LONEOS) on 2050-Jun-07
|publisher=JPL Horizons
|type=Perihelion occurs when rdot flips from negative to positive
|url=https://ssd.jpl.nasa.gov/horizons_batch.cgi?batch=1&COMMAND=%272001+OG108%27&START_TIME=%272050-06-06%27&STOP_TIME=%272050-06-08%27&STEP_SIZE=%271%20hours%27&QUANTITIES=%2719%27
|accessdate=2023-01-20}} (JPL#42/Soln.date: 2021-Apr-15)
|title=JPL Small-Body Database Search Engine: comets and q < 1 (au) and period < 200 (years)
|publisher=JPL Solar System Dynamics
|url=https://ssd.jpl.nasa.gov/sbdb_query.cgi?obj_group=all;obj_kind=com;obj_numbered=all;OBJ_field=0;ORB_field=0;combine_mode=AND;c1_group=ORB;c1_item=Bi;c1_op=%3C;c1_value=1;c2_group=ORB;c2_item=Bs;c2_op=%3C;c2_value=200;table_format=HTML;max_rows=200;format_option=comp;c_fields=AcBgBiBjBnBqBsCiCkAp;.cgifields=format_option;.cgifields=obj_kind;.cgifields=obj_group;.cgifields=obj_numbered;.cgifields=combine_mode;.cgifields=ast_orbit_class;.cgifields=table_format;.cgifields=com_orbit_class&query=1&c_sort=ApD
|access-date=24 July 2020}}
}}
External links
- {{JPL Small Body|id=1000373}}
{{Comets}}
{{Authority control}}
{{DEFAULTSORT:LONEOS, 2001 OG108}}