65489 Ceto
Synodic rotation period | 4.43 h (0.185 d) | |
0.056±0.006[3] 0.084±0.02[4] | ||
6.54±0.06,[3] 6.4[2] | ||
65489 Ceto, as a binary also (65489) Ceto/Phorcys,
Physical characteristics
65489 Ceto is an example of a close binary TNO system in which the components are of similar size. Combined observations with the infrared Spitzer Space Telescope and the Hubble Space Telescope allow the diameter of Ceto itself to be estimated at 174+16
−18 km and the diameter of Phorcys at 132+6
−14 km, assuming equal albedo for both components.[4]
The binary nature of Ceto enables direct calculation of the system mass, allowing estimation of the masses of the components and providing additional constraints on their composition. The estimated
It has been suggested that
Ceto is listed on Michael Brown's website as possibly a dwarf planet.[5]
Satellite
Discovery | |
---|---|
Discovered by | Keith S. Noll et al. |
Discovery date | 2006 April 11 |
Designations | |
Pronunciation | /ˈfɔːrsɪs/ |
Named after | Phorcys |
(65849) Ceto I Phorcys | |
Adjectives | Phorcynian /fɔːrˈsɪniən/,[6] Phorcyan /ˈfɔːrsiən/[7] [8] |
Orbital characteristics | |
Satellite of | Ceto |
Physical characteristics[9] | |
Dimensions | 171±10[3] 132+6 −14 km.[4] primary/secondary ratio 0.76±0.01 |
ΔM = 0.56±0.03 | |
Ceto's satellite was identified as a
Phorcys's diameter has been estimated to be 171±10[3] and 132+6
−14 km.[4]
See also
References
- Marc W. Buie (2006-05-05). "Orbit Fit and Astrometric record for 65489". SwRI (Space Science Department). Retrieved 2009-01-25.
- ^ a b c "JPL Small-Body Database Browser: 65489 Ceto (2003 FX128)" (2006-05-05 last obs). Retrieved 25 March 2016.
- ^ a b c d e f Santos-Sanz, P., Lellouch, E., Fornasier, S., Kiss, C., Pal, A., Müller, T. G., Vilenius, E., Stansberry, J., Mommert, M., Delsanti, A., Mueller, M., Peixinho, N., Henry, F., Ortiz, J. L., Thirouin, A., Protopapa, S., Duffard, R., Szalai, N., Lim, T., Ejeta, C., Hartogh, P., Harris, A. W., & Rengel, M. (2012). “TNOs are Cool”: A Survey of the Transneptunian Region IV - Size/albedo characterization of 15 scattered disk and detached objects observed with Herschel Space Observatory-PACS
- ^ S2CID 1532765.
- ^ Michael E. Brown. "How many dwarf planets are there in the outer solar system? (updates daily)". California Institute of Technology. Archived from the original on 2011-10-18. Retrieved 2015-10-03.
- ^ Origin of the Homeric Poems, in The Quarterly Review, vol. LXXXVII, Jan. 1831, p. 164
- ^ Henry Tytler (1828) Punics of Caius Silius Italicus, vol. 1, p. 48 [with the stress on the first syllable, consistent with the short 'y' in Greek and Latin]
- ^ The form Phorcian is also found, but derives from the assimilated Latin Phorcus / Phorci rather than Phorcys / Phorcyos.[1]
- ^ Johnston's Archive
- ^
J. L. Elliot; S. D. Kern; K. B. Clancy; A. A. S. Gulbis; R. L. Millis; M. W. Buie; L. H. Wasserman; E. I. Chiang; A. B. Jordan; D. E. Trilling & K. J. Meech (February 2005). "The Deep Ecliptic Survey: A Search for Kuiper Belt Objects and Centaurs. II. Dynamical Classification, the Kuiper Belt Plane, and the Core Population" (PDF). The Astronomical Journal. 129 (2): 1117. doi:10.1086/427395.
External links
- Binary asteroids at johnstonsarchive
- 65489 Ceto at the JPL Small-Body Database