107 Camilla

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107 Camilla
U–B = 0.298[1]
11.53[20]
7.08[1][11][13][14][15][19]
7.1±0.02[18][21][16]

Camilla (

rotation period of 4.8 hours.[18]

Physical characteristics

Camilla has a very dark surface and primitive carbonaceous composition.

A large number of rotational

rotation period of 4.844 hours with a brightness amplitude between 0.32 and 0.53 magnitude.[16][17][a]

Lightcurve analysis indicates that Camilla's pole most likely points towards ecliptic coordinates (β, λ) = (+51°, 72°) with a 10° uncertainty,[8] which gives it an axial tilt of 29°. Follow-up modeling of photometric data gave similar results.[23][24][25]

Diameter and albedo

10

albedo between 0.160 and 0.294.[18]

Satellites

Camilla is the 6th

trinary asteroid that has been discovered in the asteroid belt, after 87 Sylvia, 45 Eugenia, 216 Kleopatra, 93 Minerva and 130 Elektra
(a quaternary).

S1

S/2001 (107) 1
Discovery[6]
Discovered byA. Storrs, F. Vilas,
R. Landis, E. Wells,
C. Woods, B. Zellner,
and M. Gaffey
Discovery date1 March 2001
Orbital characteristics[10]
Observation arc5642 days
1247.8±1.3 km
Eccentricity0.000±0.004
3.71234±0.00001 d
Inclination16.0°±0.8°
Physical characteristics
Mean diameter
12.7±3.5 km, assuming equal albedos and DCamilla = 254 km[10]
16±6 km[9]
~ 11 ± 2 km[27]
Mass~1.5×1015 kg[30]
13.18[27]

On 1 March 2001, a minor-planet moon of Camilla was found by A. Storrs, F. Vilas, R. Landis, E. Wells, C. Woods, B. Zellner, and M. Gaffey using the Hubble Space Telescope.[6] It has been designated S/2001 (107) 1 but has not yet received an official name.

Later observations in September 2005 with the Very Large Telescope (VLT) allowed the determination of an orbit. Apart from data in infobox, the inclination was found to be 3 ± 1° with respect to an axis pointing towards (β, λ) = (+55°, 75°). Given the ~10° uncertainty in the actual rotational axis of Camilla, one can say that the orbit's inclination is less than 10°.

The satellite is estimated to measure about 11 km in diameter.[27] Assuming a similar density to the primary, this would give it an approximate mass of ~1.5×1015 kg. It has a similar colour to the primary.[6]

S2

S/2016 (107) 1
Discovery[7]
Discovered byM. Marsset, B. Carry, B. Yang, F. Marchis, P. Vernazza, C. Dumas, J. Berthier, F. Vachier
Discovery date2015 May 29
Orbital characteristics[10]
Observation arc428 days
643.8±1.3 km
Eccentricity0.18+0.08
−0.06
1.376±0.005 d
Inclination27.7°±7.3°
Satellite of107 Camilla
Physical characteristics
Mean diameter
4.0±1.2 km, assuming equal albedos and DCamilla = 254 km[10]

In 2016, the discovery of a second satellite of Camilla was reported by astronomers at Cerro Paranal's Very Large Telescope in Chile. It has the provisional designation S/2016 (107) 1.[7]

Observations were taken between 29 May 2015 and 30 July 2016, using the

semi-major axis of 340 kilometers.[5]

Notes

  1. ^ a b Pietschnig (2011) web: Photometric observations from 28 March 2007. Rotation period 4.844±0.003 hours with a brightness amplitude of 0.47 magnitude. Quality code of 3. Summary figures at Collaborative Asteroid Lightcurve Link (CALL)

References

  1. ^ a b c d e f g "JPL Small-Body Database Browser: 107 Camilla" (2018-02-07 last obs.). Jet Propulsion Laboratory. Retrieved 7 July 2018.
  2. ^ a b "107 Camilla". Minor Planet Center. Retrieved 7 July 2018.
  3. ^ Noah Webster (1884) A Practical Dictionary of the English Language
  4. ^
    ISBN 978-3-540-00238-3
    .
  5. ^ a b Johnston, Robert (23 June 2015). "(107) Camilla, S/2001 (107) 1, and S/2016 (107) 1". johnstonsarchive.net. Retrieved 30 March 2017.
  6. ^ a b c d IAUC 7599
  7. ^
    Bibcode:2016IAUC.9282....1M
    . Retrieved 30 March 2017.
  8. ^
    S2CID 119609765
    . Retrieved 30 March 2017.
  9. ^ a b c d Jim Baer (2008). "Recent Asteroid Mass Determinations". Personal Website. Archived from the original on 2 July 2013. Retrieved 5 December 2008.
  10. ^ a b c d e f g M. Pajuelo, Benoit Carry, Frédéric Vachier, Michael Marsset et al. (March 2018) Physical, spectral, and dynamical properties of asteroid (107) Camilla and its satellites, Icarus 309
  11. ^
    doi:10.1093/pasj/63.5.1117. (online, AcuA catalog p. 153
    )
  12. ^
    S2CID 119293330
    . Retrieved 30 March 2017.
  13. ^
    Bibcode:2004PDSS...12.....T
    . Retrieved 7 July 2018.
  14. ^
    S2CID 161887
    . Retrieved 30 March 2017.
  15. ^
    doi:10.1016/j.icarus.2012.07.013
    . Retrieved 30 March 2017.
  16. ^
    ISSN 0019-1035
    . Retrieved 30 March 2017.
  17. ^
    ISSN 1052-8091
    . Retrieved 30 March 2017.
  18. ^ a b c d "LCDB Data for (107) Camilla". Asteroid Lightcurve Database (LCDB). Retrieved 30 March 2017.
  19. ^
    S2CID 35447010
    .
  20. ^ "AstDys (107) Camilla Ephemerides". Department of Mathematics, University of Pisa, Italy. Retrieved 28 June 2010.
  21. ^
    doi:10.1016/j.icarus.2012.07.026
    . Retrieved 30 March 2017.
  22. ISSN 1052-8091
    . Retrieved 30 March 2017.
  23. ^
    S2CID 119271216
    . Retrieved 30 March 2017.
  24. ^
    S2CID 118710558
    . Retrieved 30 March 2017.
  25. S2CID 119112278
    .
  26. doi:10.1086/154242
    . Retrieved 31 March 2017.
  27. ^
    PMID 19081813
    .
  28. S2CID 119271353
    . Retrieved 30 March 2017.
  29. Bibcode:2011epsc.conf.1657H
    . Retrieved 30 March 2017.
  30. ^ Assuming a similar density to the primary.

External links

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