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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 46 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1647772306921218 1.2764e-08  
a 2.98317356311682 7.6861e-09 au
q 2.491614484712481 3.7189e-08 au
i 18.21140976705925 5.0341e-07 deg
node 333.5728614640626 1.7361e-06 deg
peri 12.50245642925221 9.3127e-06 deg
M 26.84748370230781 6.5401e-06 deg
tp 2459060.148423247483
(2020-Jul-29.64842325)		 3.4157e-05 TDB
period 1881.985224058924
5.15		 7.2734e-06
1.991e-08		 d
yr
n .191287367933516 7.3927e-10 deg/d
Q 3.474732641521159 8.9526e-09 au
   Orbit Determination Parameters
   # obs. used (total)      3507  
   data-arc span      56804 days (155.52 yr)  
   first obs. used      1865-08-27  
   last obs. used      2021-03-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41569  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 10:13:37  

Additional Information
 Earth MOID = 1.48435 au 
 Jupiter MOID = 1.94053 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 7.67   n/a E2021B10 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. 2020-October); 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]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
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

[ show close-approach data ]
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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