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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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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 102 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2066670049357609 7.7219e-09  
a 2.61960644822191 3.7677e-09 au
q 2.078220229457481 2.0103e-08 au
i 8.702155727048719 2.9306e-07 deg
node 333.3922484786294 2.2236e-06 deg
peri 152.8037033660965 8.6078e-06 deg
M 143.3502197511078 5.9835e-06 deg
tp 2458779.836327048277
(2019-Oct-23.33632705)
2.5602e-05 TDB
period 1548.647240639508
4.24
3.3411e-06
9.147e-09
d
yr
n .2324609443344499 5.0152e-10 deg/d
Q 3.160992666986339 4.5464e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3069  
   data-arc span      57830 days (158.33 yr)  
   first obs. used      1863-04-10  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4589  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 06:10:22  

Additional Information
 Earth MOID = 1.09781 au 
 Jupiter MOID = 1.9084 au 
 T_jup = 3.359 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457244.5 (2015-Aug-10.0) TDB
Reference: JPL 102 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2077574572854924 7.7614e-09  
q 2.075117245429276 2.0311e-08 au
tp 2457233.162199376992
(2015-Jul-29.66219938)
2.5512e-05 TDB
node 333.4188212630787 2.2229e-06 deg
peri 153.0356016972358 8.5366e-06 deg
i 8.704941583408603 2.9307e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      3069  
   data-arc span      57830 days (158.33 yr)  
   first obs. used      1863-04-10  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4589  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 06:10:22  

Additional Information
 Jupiter MOID = 1.9084 au 
 T_jup = 3.359 
Orbit Covariance (6×6)
  e q tp node peri i
e 6.023890361237056E-17 -1.558543820751098E-16 2.218473771538766E-14 3.430513201862108E-15 3.623862109206293E-15 2.521961512993008E-16
q -1.558543820751098E-16 4.125540495318508E-16 -6.950869273038821E-14 -8.912848920070229E-15 -1.323466754937287E-14 -6.445555644764068E-16
tp 2.218473771538766E-14 -6.950869273038821E-14 6.508488560811783E-10 -2.278820410479343E-11 2.124389129688295E-10 -7.678530043431363E-13
node 3.430513201862108E-15 -8.912848920070229E-15 -2.278820410479343E-11 4.94121631167242E-12 -1.0884208020153E-11 1.811324600034936E-13
peri 3.623862109206293E-15 -1.323466754937287E-14 2.124389129688295E-10 -1.0884208020153E-11 7.287363647785087E-11 -4.197185673848824E-13
i 2.521961512993008E-16 -6.445555644764068E-16 -7.678530043431363E-13 1.811324600034936E-13 -4.197185673848824E-13 8.589150059802545E-14

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 8.39   n/a E2021B10 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. 2020-October); 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.]
[Franco, L.; Marchini, A.; Saya, L.-F.; Galli, G.; et al. (2020) Minor Planet Bull. 47, 242-246.]
[Pilcher, F. (2020) Minor Planet Bull. 47, 344-346.]
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

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