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307 Nike (A891 EB)
Classification: Main-belt Asteroid          SPK-ID: 2000307
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1434746233435968 3.3802e-08  
a 2.906724997053014 9.6214e-09 au
q 2.489683722937416 9.7882e-08 au
i 6.125987010836908 3.435e-06 deg
node 100.9563264971407 3.9768e-05 deg
peri 324.3777492620378 4.2102e-05 deg
M 89.36580030641115 1.3912e-05 deg
tp 2458551.161953074506
(2019-Mar-08.66195307)
6.9748e-05 TDB
period 1810.107405053619
4.96
8.9873e-06
2.461e-08
d
yr
n .198883225931743 9.8747e-10 deg/d
Q 3.323766271168613 1.1002e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3171  
   data-arc span      47221 days (129.28 yr)  
   first obs. used      1891-03-05  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42461  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:11:28  

Additional Information
 Earth MOID = 1.50661 au 
 Jupiter MOID = 1.97523 au 
 T_jup = 3.261 
[ 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 10.1   n/a MPO502155 IRAS observations used: 17
diameter diameter 61.313 km 0.789 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 11.857 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Pilcher, F. (2016) Minor Planet Bull. 43, 304-306.]
geometric albedo albedo 0.043   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.669   0.074 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=8.03, mean=8.58, max.=9.13) deg.
U-B UB 0.267   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=8.03 deg.
Tholen spectral type spec_T CX   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices

307 Nike (A891 EB)          Discovered 1891-Mar-05 by Charlois, A. at Nice
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A891 EB = 1957 LM 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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