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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .569471666372691 6.3462e-07  
a 20.36226848134155 4.72e-05 au
q 8.766533518143854 8.8539e-06 au
i 24.61260328237832 1.3266e-05 deg
node 119.4454732441123 2.9707e-05 deg
peri 354.8444897371594 0.00012916 deg
M 115.0137311140557 0.00042581 deg
tp 2448478.276449929752
(1991-Aug-09.77644993)
0.0024707 TDB
period 33561.21430577225
91.89
0.11669
0.0003195
d
yr
n .01072666789467397 3.7297e-08 deg/d
Q 31.95800344453925 7.4079e-05 au
  Orbit Determination Parameters
   # obs. used (total)      392  
   data-arc span      14881 days (40.74 yr)  
   first obs. used      1977-07-22  
   last obs. used      2018-04-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      1  
   norm. resid. RMS      .54502  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 17:11:55  

Additional Information
 Earth MOID = 7.78359 au 
 Jupiter MOID = 3.50738 au 
 T_jup = 3.212 
[ 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. 2020-October); 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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