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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1673779629065661 4.9368e-08  
a 2.983264501406616 1.128e-08 AU
q 2.483931766349704 1.4755e-07 AU
i 18.2118180025549 6.2316e-06 deg
node 333.72815174513 1.6477e-05 deg
peri 12.87727452705219 2.4191e-05 deg
M 325.5512282914021 1.9526e-05 deg
tp 2457180.597344032250
(2015-Jun-07.09734403)
0.00010238 JED
period 1882.071279639509
5.15
1.0675e-05
2.923e-08
d
yr
n .1912786215349688 1.0849e-09 deg/d
Q 3.482597236463528 1.3169e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1076  
   data-arc span      54377 days (148.88 yr)  
   first obs. used      1865-08-27  
   last obs. used      2014-07-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .64206  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Aug-13 13:51:04  

Additional Information
 Earth MOID = 1.4792 AU 
 T_jup = 3.162 
[ 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 Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) 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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