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61 Danae
Classification: Main-belt Asteroid          SPK-ID: 2000061
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1672115822886809 4.7778e-08  
a 2.982636098532021 1.0575e-08 au
q 2.483904797105144 1.4215e-07 au
i 18.21205810003767 5.8001e-06 deg
node 333.7272544548143 1.5975e-05 deg
peri 12.80773034171497 2.2589e-05 deg
M 42.12568901475748 1.6364e-05 deg
tp 2457180.337500005139
(2015-Jun-06.83750001)
8.5361e-05 JED
period 1881.476644106262
5.15
1.0006e-05
2.739e-08
d
yr
n .1913390746187056 1.0176e-09 deg/d
Q 3.481367399958898 1.2343e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1196  
   data-arc span      54892 days (150.29 yr)  
   first obs. used      1865-08-27  
   last obs. used      2015-12-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .63835  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 12:30:50  

Additional Information
 Earth MOID = 1.47671 au 
 Jupiter MOID = 1.92407 au 
 T_jup = 3.163 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 7.68 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 18
diameter diameter 82.04 km 4.3 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 18
rotation period rot_per 11.45 h n/a LCDB (Rev. 2015-December); 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 0.2224   0.025 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 18
B-V BV .852 mag .014 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=7; phase (min.=2.87, mean=6.84, max.=15.66) deg.
U-B UB .402 mag .031 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #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          Discovered 1860-Sep-09 by Goldschmidt, H. at Paris
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1953 RL1 = A917 SM 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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