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JPL Small-Body Database Browser
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5145 Pholus (1992 AD)
Classification: Centaur          SPK-ID: 2005145
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5695299611292995 1.6112e-06  
a 20.39273171513441 9.8894e-05 au
q 8.778460014093676 1.1674e-05 au
i 24.6297476692798 1.7174e-05 deg
node 119.4214824866564 4.8107e-05 deg
peri 355.0412065723731 0.00019775 deg
M 108.1588305545624 0.00082696 deg
tp 2448494.692586891224
(1991-Aug-26.19258689)
0.0039039 TDB
period 33636.55699738606
92.09
0.24468
0.0006699
d
yr
n .01070264117781068 7.7853e-08 deg/d
Q 32.00700341617515 0.00015522 au
  Orbit Determination Parameters
   # obs. used (total)      334  
   data-arc span      14881 days (40.74 yr)  
   first obs. used      1977-07-22  
   last obs. used      2018-04-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      1  
   norm. resid. RMS      .56251  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 18:37:02  

Additional Information
 Earth MOID = 7.79583 au 
 Jupiter MOID = 3.52113 au 
 T_jup = 3.214 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 7.1   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 LCDB (Rev. 2019-January); Warner et al., 2009 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 | Mission Design | Physical Parameters | Discovery Circumstances ]
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