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JPL Small-Body Database Browser
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1236 Thais (1931 VX)
Classification: Main-belt Asteroid          SPK-ID: 2001236
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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2415055310081752 3.9832e-08  
a 2.430785103823057 5.9363e-09 au
q 1.843737056557508 9.7143e-08 au
i 13.17473577863728 4.1752e-06 deg
node 48.61003115655809 1.6366e-05 deg
peri 306.1720067488283 1.7739e-05 deg
M 64.18993650016125 7.3853e-06 deg
tp 2458353.678651029697
(2018-Aug-23.17865103)
2.8184e-05 TDB
period 1384.261933785927
3.79
5.0708e-06
1.388e-08
d
yr
n .260066387157962 9.5267e-10 deg/d
Q 3.017833151088607 7.3699e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2263  
   data-arc span      32160 days (88.05 yr)  
   first obs. used      1931-11-10  
   last obs. used      2019-11-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42578  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-03 20:19:19  

Additional Information
 Earth MOID = .873401 au 
 Jupiter MOID = 2.51314 au 
 T_jup = 3.432 
[ 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 11.93   n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 7
diameter diameter 22.34 km 1.3 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 7
rotation period rot_per 72. h n/a LCDB (Rev. 2019-January); Warner et al., 2009 lower-limit; Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Schober, H.J.; Schroll, A. (1983) Astron. Astrophys. 120, 106-108.]
geometric albedo albedo 0.0599   0.007 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 7
B-V BV 0.785   0.035 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=13.94, mean=16.65, max.=19.36) deg.
U-B UB 0.383   0.040 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=19.36 deg.
Tholen spectral type spec_T T   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo

1236 Thais (1931 VX)          Discovered 1931-Nov-06 by Neujmin, G. at Simeis
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1931 VX = 1957 LQ = 1964 JH = 1965 WA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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