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95 Arethusa (A867 WA)
Classification: Main-belt Asteroid          SPK-ID: 2000095
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 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1527887291620676 3.617e-08  
a 3.064051147109587 8.2549e-09 au
q 2.595898666255138 1.1131e-07 au
i 12.99563182108477 4.0259e-06 deg
node 243.019902043637 1.9962e-05 deg
peri 153.7846519863108 2.4446e-05 deg
M 147.7093146257104 1.4987e-05 deg
tp 2458196.700327461851
8.047e-05 TDB
period 1959.036116625281
n .1837638402604599 7.4262e-10 deg/d
Q 3.532203627964036 9.5161e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2913  
   data-arc span      54030 days (147.93 yr)  
   first obs. used      1872-09-23  
   last obs. used      2020-08-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42505  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:33:28  

Additional Information
 Earth MOID = 1.61108 au 
 Jupiter MOID = 1.89417 au 
 T_jup = 3.176 
[ 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 8.0   n/a MPO435695  
diameter diameter 147.969 km 5.148 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 8.705 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Carlsson, M.; Lagerkvist, C.-I. (1981) Astron. Astrophys. Suppl. Ser. 45, 1-4.]
[Harris, A.W.; Young, J.W. (1983) Icarus 54, 59-109.]
[Behrend, R. (2006) Observatoire de Geneve web site,]
[Durech, J.; Kaasalainen, M.; Herald, D.; Dunham, D.; et al. (2011) Icarus 214, 652-670.]
[Alton, K.B.(2013) Minor Planet Bull. 40, 87-88.]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
geometric albedo albedo 0.058   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
B-V BV 0.711   0.018 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=6; phase (min.=4.61, mean=12.77, max.=20.53) deg.
U-B UB 0.374   0.049 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=7; phase (min.=4.61, mean=11.82, max.=20.53) deg.
Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
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)

95 Arethusa (A867 WA)          Discovered 1867-Nov-23 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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