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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 47 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1647772301259816 1.2756e-08  
a 2.983173561805355 7.6087e-09 au
q 2.49161448530601 3.7187e-08 au
i 18.2114097681126 5.0341e-07 deg
node 333.5728614707612 1.7361e-06 deg
peri 12.50245666152748 9.3108e-06 deg
M 26.84748378642512 6.5397e-06 deg
tp 2459060.148422900292
(2020-Jul-29.64842290)
3.4156e-05 TDB
period 1881.985222817885
5.15
7.2001e-06
1.971e-08
d
yr
n .1912873680596568 7.3183e-10 deg/d
Q 3.4747326383047 8.8624e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3510  
   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      .4165  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 17:47:44  

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 7.66   n/a MPCxxxxx 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

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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1992-Jan-02 20:41 < 00:01 Jupiter 1.93168741478785 1.93168727185618 1.93168755771962 4.96481962408768 4.87570067916962 2448624.361715395 0.247393290623089 65.5733802541364 6.22050343283251 -87.509323863895 19510892.1668965 T 47 CATAB v2.0g-lin.ifort 2021-May-03 17:48:54 2021-May-03 17:48
2110-Jul-31 06:43 00:01 Jupiter 1.93026916270495 1.93026903856671 1.9302692868432 4.96661660022004 4.87746443492991 2491932.780101611 1.00789356543977 175.927380839839 5.95330877095334 89.7674798076124 20199848.461564 T 47 CATAB v2.0g-lin.ifort 2021-May-03 17:48:54 2021-May-03 17:48

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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