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61 Danae (A860 RC)
Classification: Main-belt Asteroid          SPK-ID: 2000061
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 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1650231348983689 4.8898e-08  
a 2.984005916950234 9.223e-09 au
q 2.491575905979824 1.4491e-07 au
i 18.20999758815464 5.5892e-06 deg
node 333.5718492597779 1.5965e-05 deg
peri 12.47044352093064 2.2993e-05 deg
M 348.6174388933621 1.9113e-05 deg
tp 2459060.029938860198
(2020-Jul-29.52993886)
0.00010007 TDB
period 1882.772935624619
5.15
8.7289e-06
2.39e-08
d
yr
n .1912073374267876 8.8647e-10 deg/d
Q 3.476435927920643 1.0745e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3157  
   data-arc span      56492 days (154.67 yr)  
   first obs. used      1865-08-27  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40191  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 00:57:26  

Additional Information
 Earth MOID = 1.48612 au 
 Jupiter MOID = 1.93828 au 
 T_jup = 3.163 
[ 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 7.5   n/a MPO492748 IRAS observations used: 18
diameter diameter 85.937 km 2.151 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 11.45 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Wood, H.J.; Kuiper, G.P. (1963) Astrophys. J. 137, 1279-1285.]
[Behrend, R. (2010) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.203   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.852   0.014 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=7; phase (min.=2.87, mean=6.84, max.=15.66) deg.
U-B UB 0.402   0.031 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=7; phase (min.=2.87, mean=6.84, max.=15.66) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B S   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)

61 Danae (A860 RC)          Discovered 1860-Sep-09 by Goldschmidt, H. at Paris
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 A860 RC = 1953 RL1 = A917 SM 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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