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2060 Chiron (1977 UB)
Classification: Centaur          SPK-ID: 2002060
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 133 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3779433278717397 7.2458e-08  
a 13.6938534754647 1.4754e-06 au
q 8.518352921559586 8.9878e-07 au
i 6.934689051383724 5.7713e-06 deg
node 209.2593631444583 3.9123e-05 deg
peri 339.7662450797253 4.1741e-05 deg
M 176.7927825261844 3.6208e-05 deg
tp 2450110.812090025227
(1996-Jan-28.31209003)
0.00046573 TDB
period 18509.16989276
50.68
0.0029913
8.19e-06
d
yr
n .01944981877014467 3.1433e-09 deg/d
Q 18.86935402936982 2.033e-06 au
  Orbit Determination Parameters
   # obs. used (total)      3261  
   data-arc span      45945 days (125.79 yr)  
   first obs. used      1895-04-24  
   last obs. used      2021-02-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4379  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 13:17:46  

Additional Information
 Earth MOID = 7.51969 au 
 Jupiter MOID = 3.08334 au 
 T_jup = 3.362 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456813.5 (2014-Jun-05.0) TDB
Reference: JPL 133 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3816347312152278 7.2102e-08  
q 8.435377881266309 8.9247e-07 au
tp 2450121.312214199424
(1996-Feb-07.81221420)
0.00045608 TDB
node 209.3025710304428 3.9246e-05 deg
peri 339.3215031466947 4.1783e-05 deg
i 6.935294642598302 5.7882e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3261  
   data-arc span      45945 days (125.79 yr)  
   first obs. used      1895-04-24  
   last obs. used      2021-02-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4379  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 13:17:46  

Additional Information
 Jupiter MOID = 3.08334 au 
 T_jup = 3.362 
Orbit Covariance (6×6)
  e q tp node peri i
e 5.198703881783559E-15 -3.474485746629453E-14 1.603870762624536E-11 4.33355387735982E-15 4.732161379283474E-13 6.532975845771104E-16
q -3.474485746629453E-14 7.965063363127667E-13 1.073886621116737E-10 -2.188133888831682E-14 6.530880745783671E-12 2.47120954889314E-15
tp 1.603870762624536E-11 1.073886621116737E-10 2.080077206106122E-7 2.393276437438179E-11 6.14132260543162E-9 2.745144264363557E-12
node 4.33355387735982E-15 -2.188133888831682E-14 2.393276437438179E-11 1.540258711619235E-9 -1.528361047816377E-9 -1.742953366901112E-10
peri 4.732161379283474E-13 6.530880745783671E-12 6.14132260543162E-9 -1.528361047816377E-9 1.745802953144615E-9 1.731737084167514E-10
i 6.532975845771104E-16 2.47120954889314E-15 2.745144264363557E-12 -1.742953366901112E-10 1.731737084167514E-10 3.350364137548333E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 5.83   n/a MPCxxxxx  
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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