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| | discovery_site = ]<ref name="MPC-object"/> | | discovery_site = ]<ref name="MPC-object"/> | ||
| | discovered = 1 February 2005 | | discovered = 1 February 2005 | ||
| | mp_category = ] |
| mp_category = ]{{·}}]{{·}}]{{·}}] | ||
| | aphelion = 59 |
| aphelion = 59.197 AU | ||
| | perihelion = 37 |
| perihelion = 37.126 AU | ||
| | semimajor = 48 |
| semimajor = 48.183 AU | ||
| | eccentricity = 0 |
| eccentricity = 0.229 | ||
| | period = 328.08 |
| period = 328.08 ] | ||
| | inclination = 11 |
| inclination = 11.7° | ||
| | mean_diameter = |
| mean_diameter = 313 km | ||
| | mean_radius = |
| mean_radius = 156 km | ||
| | density = 0.192 | | density = 0.192 | ||
| }} | }} | ||
| '''{{mp|612931|2005 CA|79}}''', also written '''2005 CA79''' is a ] |
'''{{mp|612931|2005 CA|79}}''', also written '''2005 CA79''' is a ] from the ] in the outermost regions of the ]. It was discovered in February 1, 2005 by a team led by ] on the ]. It is classified as a ], a ] in a ] mean-motion ] with ]. The ] measures approximately 340 km in diameter.<ref name=A>{{cite web|language=en | url = http://www.minorplanetcenter.org/iau/lists/TNOs.html | title = List Of Transneptunian Objects | publisher = ] | date = November 18, 2014}}</ref><ref>{{cite web|language=en | url = http://web.gps.caltech.edu/~mbrown/dps.html | title = How many dwarf planets are there in the outer solar system? (updates daily) | date = April 15, 2015}}</ref> As of 2021, it has not been ]. | ||
| == Orbit and classification == | |||
| == Discovery == | |||
| {{mp|2005 CA|79}} orbits the sun at a distance of 37.1-59.1 AU per 326.5 Earth years. (174,276 days, ] of 48.1 AU). Its orbit has an eccentricity of 0.229 and an inclination of 11.7° respective to the ]. Its ] began with ] in 2005. | |||
| 2005 CA79 was discovered by a team led by Mike Brown on February 5, 2005. It was not announced until 2008. It was numbered in 2017.<ref name=A/> | |||
| {{mp|2005 CA|79}} is a trans-Neptunian object and belongs to the ] a mid-sized group of objects locked in a 1:2 mean-motion ] with the planet ] (for every orbit a twotino makes, Neptune orbits twice). These objects are therefore protected from Neptune's scattering effect. Twotinos are located in the outer ridge of the ], a disc of mostly non-resonant ]s. | |||
| == Twotino == | |||
| 2005 CA79 is a ], an object in a 1:2 orbital resonance with Neptune. It takes 328 years to complete an orbit around the Sun. | |||
| == Numbering and naming == | |||
| {{mp|2005 CA|79}} was numbered by the ] in late-2021, receiving the number {{LoMP|612931|(612931)}} in the ]. As of 2020, it has not been ].<ref name=A/> | |||
| == Physical characteristics == | == Physical characteristics == | ||
| === Colour and rotation period === | |||
| {{mp|612931|2005 CA|79}}'s orbit has an ] of 0,229 and has a semi-major axis of 48,183 AU. It's ] is located over 58,120 AU and its ] is located over 37,126 AU.<ref name=A/> It is today 44,372 AU from the Sun. | |||
| As of 2021, no ] nor a rotational ] has been obtained from ]. The body's color, ], ], ], and shape remain unknown. | |||
| === Diameter and albedo === | |||
| According to ] and Johnston's Archive, {{mp|2005 CA|79}} measures approximately 449 km and 339 km in diameter with ]s of 0.030 and 0.040 respectively. On his website ] estimates a diameter of 449 km and lists it as a ] which is the category with the second lowest certainity on his 5-class taxonomic system (see ]). | |||
| == See also == | == See also == | ||
| * |
* {{mpl|(308193) 2005 CB|79}} | ||
| * ] | * ] | ||
Revision as of 04:55, 22 January 2025
| Discovery | |
|---|---|
| Discovered by | Mike Brown |
| Discovery site | Palomar Observatory |
| Discovery date | 1 February 2005 |
| Designations | |
| Minor planet category | TNO · twotino · distant · p-DP |
| Orbital characteristics | |
| Aphelion | 59.197 AU |
| Perihelion | 37.126 AU |
| Semi-major axis | 48.183 AU |
| Eccentricity | 0.229 |
| Orbital period (sidereal) | 328.08 yr |
| Inclination | 11.7° |
| Physical characteristics | |
| Mean diameter | 313 km |
| Mean radius | 156 km |
| Mean density | 0.192 |
(612931) 2005 CA79, also written 2005 CA79 is a resonant trans-Neptunian object from the Kuiper belt in the outermost regions of the Solar System. It was discovered in February 1, 2005 by a team led by Michael E. Brown on the Palomar Observatory. It is classified as a twotino, a minor planet in a 1:2 mean-motion orbital resonance with Neptune. The dwarf planet candidate measures approximately 340 km in diameter. As of 2021, it has not been named.
Orbit and classification
2005 CA79 orbits the sun at a distance of 37.1-59.1 AU per 326.5 Earth years. (174,276 days, semi-major axis of 48.1 AU). Its orbit has an eccentricity of 0.229 and an inclination of 11.7° respective to the elliptic. Its observation arc began with Palomar Observatories in 2005.
2005 CA79 is a trans-Neptunian object and belongs to the twotinos a mid-sized group of objects locked in a 1:2 mean-motion orbital resonance with the planet Neptune (for every orbit a twotino makes, Neptune orbits twice). These objects are therefore protected from Neptune's scattering effect. Twotinos are located in the outer ridge of the Kuiper belt, a disc of mostly non-resonant trans-Neptunian objects.
Numbering and naming
2005 CA79 was numbered by the Minor Planet Center in late-2021, receiving the number (612931) in the minor planet catalog. As of 2020, it has not been named.
Physical characteristics
Colour and rotation period
As of 2021, no spectrum nor a rotational lightcurve has been obtained from photometry. The body's color, rotation period, axial tilt, pole, and shape remain unknown.
Diameter and albedo
According to Michael E. Brown and Johnston's Archive, 2005 CA79 measures approximately 449 km and 339 km in diameter with geometric albedos of 0.030 and 0.040 respectively. On his website Mike Brown estimates a diameter of 449 km and lists it as a "probable" dwarf planet which is the category with the second lowest certainity on his 5-class taxonomic system (see here).
See also
References
- "(612931) = 2005 CA79". Minor Planet Center. Retrieved 22 November 2024.
- ^ "List Of Transneptunian Objects". Minor Planet Center. November 18, 2014.
- "How many dwarf planets are there in the outer solar system? (updates daily)". April 15, 2015.
External links
| Minor planets navigator | |
|---|---|