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78 Diana (A863 EA)
Classification: Main-belt Asteroid          SPK-ID: 2000078
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 91 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2071483622386742 3.6488e-08  
a 2.618808182473894 4.7727e-09 au
q 2.076326356457188 9.6201e-08 au
i 8.70190501121758 4.8371e-06 deg
node 333.3971837668952 2.6474e-05 deg
peri 152.7401020343127 2.9099e-05 deg
M 51.2912993674118 1.1424e-05 deg
tp 2458779.956043649603
(2019-Oct-23.45604365)
4.902e-05 TDB
period 1547.939421799628
4.24
4.2316e-06
1.159e-08
d
yr
n .2325672406362423 6.3576e-10 deg/d
Q 3.161290008490601 5.7613e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2669  
   data-arc span      57360 days (157.04 yr)  
   first obs. used      1863-04-10  
   last obs. used      2020-04-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4694  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 00:57:44  

Additional Information
 Earth MOID = 1.09539 au 
 Jupiter MOID = 1.90905 au 
 T_jup = 3.359 
[ 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 8.4   n/a MPO502153 IRAS observations used: 26
magnitude slope G 0.08   n/a PDS3 (MPC 17257) Fit
diameter diameter 120.60 km 2.7 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 26
rotation period rot_per 7.2991 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Harris, A.W.; Young, J.W. (1989) Icarus 81, 314-364.]
[Licchelli, D. (2006) Minor Planet Bull. 33, 11-13.]
[Fleenor, M.L. (2007) Minor Planet Bull. 34, 66-67.]
[Benishek, V.; Protitch-Benishek, V. (2008) Minor Planet Bull. 35, 28-30.]
[Fauerbach, M.; Marks, S.A.; Lucas, M.P. (2008) Minor Planet Bull. 35, 44-46.]
geometric albedo albedo 0.0706   0.003 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 26
B-V BV 0.713   0.030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=1.69, mean=8.62, max.=16.99) deg.
U-B UB 0.380   0.010 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=1.69, mean=9.58, max.=16.99) deg.
Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices
SMASSII spectral type spec_B Ch   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)

78 Diana (A863 EA)          Discovered 1863-Mar-15 by Luther, R. at Dusseldorf
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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