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5145 Pholus (1992 AD)
Classification: Centaur          SPK-ID: 2005145
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5736380615300314 1.4604e-06  
a 20.33842632949316 8.72e-05 AU
q 8.671530875271353 9.4341e-06 AU
i 24.73203268132474 1.4628e-05 deg
node 119.2539858297347 4.3355e-05 deg
peri 354.9434423597743 0.0001629 deg
M 90.96941827410897 0.00061673 deg
tp 2448534.712488290592
(1991-Oct-05.21248829)
0.0031001 JED
period 33502.28639510598
91.72
0.21546
0.0005899
d
yr
n .01074553526748517 6.9107e-08 deg/d
Q 32.00532178371497 0.00013722 AU
  Orbit Determination Parameters
   # obs. used (total)      325  
   data-arc span      11593 days (31.74 yr)  
   first obs. used      1977-07-22  
   last obs. used      2009-04-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      1  
   fit RMS      .60377  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-09 18:09:15  

Additional Information
 Earth MOID = 7.68867 AU 
 T_jup = 3.198 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 7.1 mag n/a MPO169571  
diameter diameter 190 km 26 Earth, Moon, and Planets, v. 89, Issue 1, p. 117-134 (2002)  
rotation period rot_per 9.980 h n/a Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) Published Reference List:
[Buie, M.W.; Bus, S.J. (1992) Icarus 100, 288-294.]
[Hoffmann, M.; Fink, U.; Grundy, W.M. (1992) in Observations and Physical Properties of Small Solar System Bodies. A. Brahic, J.-C. Gerard, J. Surdej, eds. Universite de Liege, Institut d'Astrophysique, Liege, pp. 203-208.]
[Farnham, T.L. (2001) Icarus 152, 238-245.]
[Tegler, S.C.; Romanishin, W.; Consolmagno, G.J.; Rall, J.; et al. (2005) Icarus 175, 390-396.]
geometric albedo albedo 0.044   0.013 Earth, Moon, and Planets, v. 89, Issue 1, p. 117-134 (2002)  
Tholen spectral type spec_T Z   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 3 color indices

5145 Pholus (1992 AD)          Discovered 1992-Jan-09 by Spacewatch at Kitt Peak
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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