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78 Diana
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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 89 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2073652078287202 3.723e-08  
a 2.619441852338711 4.9045e-09 au
q 2.076260748233246 9.838e-08 au
i 8.70097360457383 4.8545e-06 deg
node 333.4009198668907 2.7124e-05 deg
peri 152.7725034220486 2.9707e-05 deg
M 318.2551675352949 1.1622e-05 deg
tp 2458780.060907577909
(2019-Oct-23.56090758)
5.0087e-05 TDB
period 1548.501285343552
4.24
4.349e-06
1.191e-08
d
yr
n .2324828551370108 6.5293e-10 deg/d
Q 3.162622956444176 5.9215e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2572  
   data-arc span      57219 days (156.66 yr)  
   first obs. used      1863-04-10  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46503  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 20:36:24  

Additional Information
 Earth MOID = 1.0957 au 
 Jupiter MOID = 1.90908 au 
 T_jup = 3.359 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455127.5 (2009-Oct-23.0) TDB
Reference: JPL 89 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .20631532885917 3.7305e-08  
q 2.081511226542245 9.8295e-08 au
tp 2455683.067678500451
(2011-May-01.56767850)
4.9508e-05 TDB
node 333.4598799656492 2.7082e-05 deg
peri 152.4872056559455 2.9677e-05 deg
i 8.705390695256739 4.8539e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2572  
   data-arc span      57219 days (156.66 yr)  
   first obs. used      1863-04-10  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46503  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 20:36:24  

Additional Information
 Jupiter MOID = 1.90908 au 
 T_jup = 3.359 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.391691889687825E-15 -3.664059182399582E-15 4.798901480272355E-13 -9.069272803275052E-15 1.476951579941808E-13 -6.801768262045753E-16
q -3.664059182399582E-15 9.661881028831854E-15 -1.249385784393483E-12 2.314388184762111E-14 -3.886844351532641E-13 1.507030430639495E-15
tp 4.798901480272355E-13 -1.249385784393483E-12 2.451059922347197E-9 -1.874186282449236E-11 6.138381820909922E-10 -8.097935883961937E-14
node -9.069272803275052E-15 2.314388184762111E-14 -1.874186282449236E-11 7.334463353230485E-10 -7.294587837180717E-10 2.774095508950294E-11
peri 1.476951579941808E-13 -3.886844351532641E-13 6.138381820909922E-10 -7.294587837180717E-10 8.807270191157175E-10 -2.750648360268948E-11
i -6.801768262045753E-16 1.507030430639495E-15 -8.097935883961937E-14 2.774095508950294E-11 -2.750648360268948E-11 2.356063745721681E-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 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-January); 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          Discovered 1863-Mar-15 by Luther, R. at Dusseldorf
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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