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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 90 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2071483652162709 3.7058e-08  
a 2.618808182258433 4.8765e-09 au
q 2.076326348488605 9.7823e-08 au
i 8.70190630326633 4.8495e-06 deg
node 333.3971602376916 2.6808e-05 deg
peri 152.7401252482877 2.9421e-05 deg
M 51.29129972878793 1.1555e-05 deg
tp 2458779.956042122964
(2019-Oct-23.45604212)
4.9567e-05 TDB
period 1547.939421608594
4.24
4.3237e-06
1.184e-08
d
yr
n .2325672406649439 6.496e-10 deg/d
Q 3.161290016028261 5.8867e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2623  
   data-arc span      57249 days (156.74 yr)  
   first obs. used      1863-04-10  
   last obs. used      2020-01-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46061  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 17:13:57  

Additional Information
 Earth MOID = 1.09539 au 
 Jupiter MOID = 1.90905 au 
 T_jup = 3.359 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455185.5 (2009-Dec-20.0) TDB
Reference: JPL 90 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2064173574665596 3.7156e-08  
q 2.080585107368193 9.7863e-08 au
tp 2455683.327852120349
(2011-May-01.82785212)
4.9037e-05 TDB
node 333.4592330848045 2.6775e-05 deg
peri 152.5849286934921 2.9391e-05 deg
i 8.704991845753169 4.8492e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2623  
   data-arc span      57249 days (156.74 yr)  
   first obs. used      1863-04-10  
   last obs. used      2020-01-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46061  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 17:13:57  

Additional Information
 Jupiter MOID = 1.90905 au 
 T_jup = 3.359 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.380538433758805E-15 -3.633341269578705E-15 5.061011230548247E-13 -9.878267667892101E-15 1.532851766630707E-13 -7.108995924640366E-16
q -3.633341269578705E-15 9.577186501012363E-15 -1.323133563277586E-12 2.513052894260484E-14 -4.041821232129244E-13 1.578000436028299E-15
tp 5.061011230548247E-13 -1.323133563277586E-12 2.404653110720561E-9 -1.975908865674236E-11 6.070988746605352E-10 -1.675981378867328E-13
node -9.878267667892101E-15 2.513052894260484E-14 -1.975908865674236E-11 7.169271907729902E-10 -7.133590804640337E-10 2.686586831012885E-11
peri 1.532851766630707E-13 -4.041821232129244E-13 6.070988746605352E-10 -7.133590804640337E-10 8.638101623951769E-10 -2.665871733008288E-11
i -7.108995924640366E-16 1.578000436028299E-15 -1.675981378867328E-13 2.686586831012885E-11 -2.665871733008288E-11 2.351432851778523E-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-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          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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