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432 Pythia (A897 YC)
Classification: Main-belt Asteroid          SPK-ID: 2000432
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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 81 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .146545496316014 4.0897e-08  
a 2.369575811396893 5.7542e-09 au
q 2.022325148057313 9.7004e-08 au
i 12.12113897192558 4.7065e-06 deg
node 88.74934330756142 1.9624e-05 deg
peri 174.0768198435171 2.4375e-05 deg
M 22.70289227055928 1.5683e-05 deg
tp 2458916.479932455250
(2020-Mar-07.97993246)
5.7937e-05 TDB
period 1332.307089142739
3.65
4.853e-06
1.329e-08
d
yr
n .27020797452308 9.8425e-10 deg/d
Q 2.716826474736472 6.5975e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2676  
   data-arc span      43879 days (120.13 yr)  
   first obs. used      1900-09-22  
   last obs. used      2020-11-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42369  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:53:35  

Additional Information
 Earth MOID = 1.00692 au 
 Jupiter MOID = 2.3634 au 
 T_jup = 3.501 
[ 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 8.9   n/a MPO473767 IRAS observations used: 27
diameter diameter 46.90 km 0.8 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 27
rotation period rot_per 8.252 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Lagerkvist, C.-I.; Rickman, H. (1981) Astron. Astrophys. Suppl. Ser. 45, 177-179.]
[Harris, A.W.; Young, J.W. (1989) Icarus 81, 314-364.]
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.2338   0.009 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 27
B-V BV 0.870   0.008 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=9.49, mean=14.21, max.=22.41) deg.
U-B UB 0.440   0.016 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=9.49, mean=14.21, max.=22.41) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices
SMASSII spectral type spec_B S   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)

432 Pythia (A897 YC)          Discovered 1897-Dec-18 by Charlois, A. at Nice
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A897 YC = 1936 PR 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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