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JPL Small-Body Database Browser
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32532 Thereus (2001 PT13)
Classification: Centaur          SPK-ID: 2032532
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 46 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2004810005267258 1.2925e-07  
a 10.61087797895214 2.3267e-06 au
q 8.483598545264815 2.5444e-06 au
i 20.36175113555811 9.9867e-06 deg
node 205.2486552942539 2.8134e-05 deg
peri 86.8611712973421 8.0601e-05 deg
M 220.8292316887668 0.00011849 deg
tp 2463881.074330911703
(2033-Oct-10.57433091)
0.005724 TDB
period 12624.82617900728
34.56
0.0041524
1.137e-05
d
yr
n .02851524408301261 9.3789e-09 deg/d
Q 12.73815741263947 2.7931e-06 au
  Orbit Determination Parameters
   # obs. used (total)      447  
   data-arc span      9004 days (24.65 yr)  
   first obs. used      1995-06-05  
   last obs. used      2020-01-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .535  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 02:47:25  

Additional Information
 Earth MOID = 7.53892 au 
 Jupiter MOID = 3.87165 au 
 T_jup = 3.114 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 9.1   n/a MPO319483  
diameter diameter 86.500 km 1.900 urn:nasa:pds:neowise_diameters_albedos::2.0[centaurs] (http://adsabs.harvard.edu/abs/2013ApJ...773...22B)  
rotation period rot_per 8.335 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Ortiz, J.L.; Baumont, S.; Gutierrez, P.J.; Roos-Serote, M. (2002) Astron. Astrophys. 388, 661-666.]
[Farnham, T.L.; Davies, J.K. (2003) Icarus 164, 418-427.]
[Ortiz, J.L.; Gutierrez, P.J.; Casanova, V.; Sota, A. (2003) Astron. Astrophys. 407, 1149-1155.]
[Rabinowitz, D.L.; Schaefer, B.E.; Tourtellotte, S.W. (2007) Astron. J. 133, 26-43.]
[Brucker, M.; Romanishin, W.J.; Tegler, S.C.; Consolmagno, S.J.; Grundy, W.M. (2008) Bull. Amer. Astron. Soc. 40, 483 (47.09)]
geometric albedo albedo 0.059   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[centaurs] (http://adsabs.harvard.edu/abs/2013ApJ...773...22B)  

32532 Thereus           Discovered 2001 Aug. 9 by the Near-Earth Asteroid Tracking project at Palomar.
The centaur Thereus was a hunter who captured bears and carried them home, alive and struggling.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030614/MPCPages.arcLast Updated: 2005-04-26

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Alternate Designations
 2001 PT13 = 1995 MM6 = 1999 NE2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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