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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 ]

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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 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1435773881949243 2.1749e-08  
a 2.9060806906675 9.219e-09 au
q 2.488833215217759 6.222e-08 au
i 6.125984444127406 9.2059e-07 deg
node 100.9540250626254 9.1432e-06 deg
peri 324.295525074045 1.2996e-05 deg
M 129.2345211000558 7.0789e-06 deg
tp 2458550.915030854206
(2019-Mar-08.41503085)
3.4165e-05 TDB
period 1809.505594185894
4.95
8.6105e-06
2.357e-08
d
yr
n .1989493711192232 9.467e-10 deg/d
Q 3.323328166117242 1.0543e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3360  
   data-arc span      47492 days (130.03 yr)  
   first obs. used      1891-03-05  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41823  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 10:40:36  

Additional Information
 Earth MOID = 1.50518 au 
 Jupiter MOID = 1.97649 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 10.13   n/a E2021B10 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. 2020-October); 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.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
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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