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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2555389887847856 3.6701e-08  
a 3.178131693060686 1.41e-08 au
q 2.365995133991079 1.2153e-07 au
i 13.71334072860376 4.8121e-06 deg
node 321.2373408267109 1.68e-05 deg
peri 135.0368816735783 1.9011e-05 deg
M 301.333852528299 9.6967e-06 deg
tp 2459537.741746333820
(2021-Nov-19.24174633)		 5.6946e-05 TDB
period 2069.456303377324
5.67		 1.3772e-05
3.771e-08		 d
yr
n .173958734674651 1.1577e-09 deg/d
Q 3.990268252130292 1.7703e-08 au
   Orbit Determination Parameters
   # obs. used (total)      2727  
   data-arc span      39072 days (106.97 yr)  
   first obs. used      1914-01-25  
   last obs. used      2021-01-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .38536  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:49:45  

Additional Information
 Earth MOID = 1.404 au 
 Jupiter MOID = 1.28813 au 
 T_jup = 3.105 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456690.5 (2014-Feb-02.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2499765647666094 3.6648e-08  
q 2.391645647265831 1.2104e-07 au
tp 2457460.097684891293
(2016-Mar-12.59768489)		 5.3293e-05 TDB
node 321.709691549388 1.678e-05 deg
peri 134.2336765830734 1.9181e-05 deg
i 13.68663339664341 4.8114e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      2727  
   data-arc span      39072 days (106.97 yr)  
   first obs. used      1914-01-25  
   last obs. used      2021-01-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .38536  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:49:45  

Additional Information
 Jupiter MOID = 1.28813 au 
 T_jup = 3.105 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.343111575524567E-15 -4.421827361613611E-15 -1.557649254455297E-14 -9.185983172038415E-15 6.624825702089026E-14 -3.567846745830441E-15
q -4.421827361613611E-15 1.465040514356768E-14 2.090596087904324E-13 4.164298199838733E-14 -2.113105668597818E-13 1.646937750254774E-14
tp -1.557649254455297E-14 2.090596087904324E-13 2.840133056852095E-9 -6.69079464738328E-12 5.043191592956623E-10 1.024233420661016E-12
node -9.185983172038415E-15 4.164298199838733E-14 -6.69079464738328E-12 2.815817187041614E-10 -2.744647987390847E-10 1.84386103198775E-11
peri 6.624825702089026E-14 -2.113105668597818E-13 5.043191592956623E-10 -2.744647987390847E-10 3.679217743004119E-10 -1.795443374854083E-11
i -3.567846745830441E-15 1.646937750254774E-14 1.024233420661016E-12 1.84386103198775E-11 -1.795443374854083E-11 2.314968406988924E-11

[ 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 9.81   n/a E2021B10 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. 2020-October); 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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