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2060 Chiron (1977 UB)
Classification: Centaur          SPK-ID: 2002060
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 132 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3779433280968109 7.2508e-08  
a 13.6938534815272 1.4762e-06 au
q 8.518352922248708 8.9881e-07 au
i 6.934689146350078 5.772e-06 deg
node 209.2593619987447 3.9152e-05 deg
peri 339.7662462509335 4.1769e-05 deg
M 176.7927823772659 3.6224e-05 deg
tp 2450110.812091645546
(1996-Jan-28.31209165)
0.00046581 TDB
period 18509.16990505147
50.68
0.0029929
8.194e-06
d
yr
n .01944981875722854 3.145e-09 deg/d
Q 18.86935404080569 2.0341e-06 au
  Orbit Determination Parameters
   # obs. used (total)      3249  
   data-arc span      45920 days (125.72 yr)  
   first obs. used      1895-04-24  
   last obs. used      2021-01-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43689  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 01:00:09  

Additional Information
 Earth MOID = 7.51969 au 
 Jupiter MOID = 3.08334 au 
 T_jup = 3.362 
[ 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 5.84   n/a E2021B10  
diameter diameter 166 km n/a Dunham occultation list: Duham 1998 Yeomans E-mail 2001-Apr-04
rotation period rot_per 5.918 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Bus, S.J.; Bowell, E.; Harris, A.W.; Hewitt, A.V. (1989) Icarus 77, 223-238.]
[Luu, J.X.; Jewitt, D.C. (1990) Astron. J. 100, 913-932.]
[Marcialis, R.L.; Buratti, B.J. (1993) Icarus 104, 234-243.]
[Lazzaro, D.; Florczak, M.A.; Angeli, C.A.; Carvano, J.M.; et al. (1997) Planet. Space Sci. 45, 1607-1614.]
geometric albedo albedo 0.15   0.03 Earth, Moon, and Planets, v. 89, Issue 1, p. 117-134 (2002)  
B-V BV 0.704   0.024 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=1.81, mean=2.51, max.=2.88) deg.
U-B UB 0.283   0.060 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=1.81, mean=2.51, max.=2.88) deg.
Tholen spectral type spec_T B   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 4 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B Cb   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

2060 Chiron (1977 UB)          Discovered 1977-Oct-18 by Kowal, C. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1977 UB = 95P 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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