60558 Echeclus

60558 Echeclus
174P/Echeclus
Discovery
Discovered bySpacewatch
Discovery siteKitt Peak Obs.
Discovery date3 March 2000
Designations
(60558) Echeclus
Pronunciation/ˈɛkɪkləs/
Named after
Ἔχεκλος Ekheklos
2000 EC98, 2002 GJ27
Centaur
Symbol (astrological)
Orbital characteristics[1]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc13264 days (36.31 yr)
Aphelion15.544 AU (2.3253 Tm)
Perihelion5.8168 AU (870.18 Gm)
10.680 AU (1.5977 Tm)
Eccentricity0.45537
34.90 yr (12749 d)
8.58 km/s
7.51102°
0° 1m 41.657s / day
Inclination4.3445°
173.335°
162.889°
Jupiter MOID0.838867 AU (125.4927 Gm)
TJupiter3.031
Proper orbital elements
0.0282 deg / yr
12765.95745 yr
(4662765.957 d)
Physical characteristics
84 km[2][3]
26.802 h (1.1168 d)[1]
0.04[3]
Temperature~85 K
B–V = 0.841±0.072[4]
V–R = 0.502±0.065[4]
~18.8[5]
9.6[1]

60558 Echeclus /ˈɛkɪkləs/ is a centaur, approximately 84 kilometers (52 miles) in diameter, located in the outer Solar System. It was discovered by Spacewatch in 2000 and initially classified as a minor planet with provisional designation 2000 EC98 (also written 2000 EC98). Research in 2001 by Rousselot and Petit at the Besançon observatory in France indicated that it was not a comet, but in December 2005 a cometary coma was detected. In early 2006[6] the Committee on Small Bodies Nomenclature (CSBN) gave it the cometary designation 174P/Echeclus. It last came to perihelion in April 2015,[1] and was expected to reach about apparent magnitude 16.7 near opposition in September 2015.[7]

  1. ^ a b c d "60558 Echeclus (2000 EC98)". JPL Small-Body Database. Jet Propulsion Laboratory. SPK-ID: 2060558. Retrieved 12 April 2016.
  2. ^ Wm. Robert Johnston (22 August 2008). "List of Known Trans-Neptunian Objects". Johnston's Archive. Archived from the original on 16 December 2006. Retrieved 2006-12-26.
  3. ^ a b John Stansberry; Will Grundy; Mike Brown; Dale Cruikshank; John Spencer; David Trilling; Jean-Luc Margot (2007). "Physical Properties of Kuiper Belt and Centaur Objects: Constraints from Spitzer Space Telescope". arXiv:astro-ph/0702538.
  4. ^ a b Cite error: The named reference Hainaut-2012 was invoked but never defined (see the help page).
  5. ^ "AstDys (60558) Echeclus Ephemerides". Department of Mathematics, University of Pisa, Italy. Retrieved 2010-06-28.
  6. ^ "Homepage of the VdS-Fachgruppe Kometen". Archived from the original on 24 April 2006. Retrieved 2006-04-18.
  7. ^ Cite error: The named reference MPC-eph was invoked but never defined (see the help page).