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JPL Small-Body Database Browser
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778 Theobalda (A914 BG)
Classification: Main-belt Asteroid          SPK-ID: 2000778
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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2553330460377172 4.0307e-08  
a 3.178937087339996 1.5002e-08 au
q 2.367249397667206 1.3116e-07 au
i 13.71207768393718 5.1284e-06 deg
node 321.2347980951027 1.9592e-05 deg
peri 134.9743159521147 2.147e-05 deg
M 266.591975523979 9.6305e-06 deg
tp 2459537.659193220620
(2021-Nov-19.15919322)
5.7363e-05 TDB
period 2070.243007966254
5.67
1.4655e-05
4.012e-08
d
yr
n .1738926293264738 1.2309e-09 deg/d
Q 3.990624777012787 1.8832e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2162  
   data-arc span      38642 days (105.80 yr)  
   first obs. used      1914-01-25  
   last obs. used      2019-11-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42626  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:36:49  

Additional Information
 Earth MOID = 1.40546 au 
 Jupiter MOID = 1.28835 au 
 T_jup = 3.105 
[ 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 9.7   n/a MPO492758 IRAS observations used: 19
diameter diameter 55.317 km 0.797 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 11.659 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Binzel, R.P.; Mulholland, J.D. (1983) Icarus 56, 519-533.]
geometric albedo albedo 0.079   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.617   0.019 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=6; phase (min.=6.61, mean=10.22, max.=21.13) deg.
U-B UB 0.256   0.023 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=6; phase (min.=6.61, mean=10.22, max.=21.13) deg.
Tholen spectral type spec_T F   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo

778 Theobalda (A914 BG)          Discovered 1914-Jan-25 by Kaiser, F. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 A914 BG = 1940 PG = 1948 CA = A923 RQ 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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