4362 Carlisle

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4362 Carlisle
Discovery
Perihelion
2.0119 AU
2.2382 AU
Eccentricity0.1011
3.35 yr (1,223 d)
21.611°
0° 17m 39.84s / day
Inclination4.7137°
34.379°
171.93°
Known satellites1[6] (>0.33 Ds/Dp P: 1.804 h)
Physical characteristics
Mean diameter
  • <5.31 km (primary)[6]
  • >1.75 km (secondary)[6]
  • 5.20±0.23 km (combined)[7]
  • 5.590±0.174 km (combined)[8][9]
Synodic rotation period
2.63289±0.00007 h[10]
S (assumed)[10]
13.16[1][5]

4362 Carlisle,

Albert Carlisle (1917–1993).[2] In June 2021, the discovery of a companion with an orbital period of 1.8 days and a diameter no less than a third of its primary, was announced.[6]

Orbit and classification

When applying the synthetic

asteroid clan.[12]

Carlisle orbits the Sun in the

semi-major axis of 2.24 AU). Its orbit has an eccentricity of 0.10 and an inclination of 5° with respect to the ecliptic.[5] The first precovery was taken at Mount Wilson Observatory in 1952, extending the body's observation arc by 26 years prior to its official discovery at Bickley.[1]

Naming

This

M.P.C. 22829).[13]

Physical characteristics

Carlisle is an assumed stony

spectral type for members of the Flora family.[10]

Rotation period

Between March and June 2021, a rotational

U=n.a.).[6][10][14]

The collaboration included the following astronomers and observatories: Vladimir Benishek at

Les Barres Observatory (France).[14]

Satellite

The international collaboration also observed

mutual occultation and eclipsing events that had an amplitude of 0.11 in magnitude. This revealed the presence of a satellite at least a third the size of Carlisle, orbiting it once every 1.804±0.001 days (or 43.3 hours) at an estimated average distance of 17 kilometers.[6][14]

Diameter and albedo

According to the surveys carried out by NASA's

albedo of 0.412±0.064 and 0.391±0.055, respectively.[7][8][9] The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.24 – taken from the Flora family's largest member and namesake, the asteroid 8 Flora – and calculates a larger diameter of 6.5 kilometers.[10]

Photometric observations by an international collaboration that discovered a satellite in 2021, gave a secondary-to-primary diameter ratio (Ds/Dp) of at least 0.33.[14] This means, that the moon's size is at least 33% of that of Carlisle's (the primary body). Based on the NEOWISE observations which gave an effective diameter of 5.59 km (3.5 mi), a lower diameter-limit for the moon of 1.75 km (1.1 mi) and an upper diameter-limit for Carlisle of 5.31 km (3.3 mi) can be calculated.[6]

References

  1. ^ a b c d "4362 Carlisle (1978 PR4)". Minor Planet Center. Retrieved 30 August 2021.
  2. ^
    ISBN 978-3-540-00238-3
    .
  3. ^ a b "Asteroid 4362 Carlisle". Small Bodies Data Ferret. Retrieved 30 August 2021.
  4. ^ a b Zappalà, V.; Bendjoya, Ph.; Cellino, A.; Farinella, P.; Froeschle, C. (1997). "Asteroid Dynamical Families". NASA Planetary Data System: EAR-A-5-DDR-FAMILY-V4.1. Retrieved 30 August 2021.} (PDS main page)
  5. ^ a b c "JPL Small-Body Database Browser: 4362 Carlisle (1978 PR4)" (2021-08-09 last obs.). Jet Propulsion Laboratory. Retrieved 30 August 2021.
  6. ^ a b c d e f g Johnston, Wm. Robert (12 July 2021). "Asteroids with Satellites Database – (4362) Carlisle". Johnston's Archive. Retrieved 30 August 2021.
  7. ^
    doi:10.1088/2041-8205/759/1/L8
    . Retrieved 24 May 2016.
  8. ^
    doi:10.1088/0004-637X/741/2/68
    . Retrieved 5 December 2016.
  9. ^
    doi:10.1088/0004-637X/741/2/90
    . Retrieved 24 May 2016.
  10. ^ a b c d e "LCDB Data for (4362) Carlisle". Asteroid Lightcurve Database (LCDB). Retrieved 30 August 2021.
  11. doi:10.2458/azu_uapress_9780816532131-ch016
    .
  12. ^ "Asteroid 4362 Carlisle – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 30 August 2021.
  13. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 24 May 2016.
  14. ^
    Central Bureau Electronic Telegrams
    . Retrieved 30 August 2021.

External links

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