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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 46 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1437014749903069 2.1614e-08  
a 2.905591592457806 8.9664e-09 au
q 2.488053794902184 6.1993e-08 au
i 6.126099060996873 9.0745e-07 deg
node 100.9522777101959 9.0464e-06 deg
peri 324.2339669511622 1.2819e-05 deg
M 168.3077533244015 7.1542e-06 deg
tp 2458550.730724863615
(2019-Mar-08.23072486)
3.4057e-05 TDB
period 1809.048799209152
4.95
8.3738e-06
2.293e-08
d
yr
n .1989996069522162 9.2114e-10 deg/d
Q 3.323129390013427 1.0255e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3685  
   data-arc span      47638 days (130.43 yr)  
   first obs. used      1891-03-05  
   last obs. used      2021-08-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40374  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 06:27:50  

Additional Information
 Earth MOID = 1.5047 au 
 Jupiter MOID = 1.9777 au 
 T_jup = 3.261 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456944.5 (2014-Oct-14.0) TDB
Reference: JPL 46 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1420852768924919 2.1681e-08  
q 2.496148452765985 6.2289e-08 au
tp 2456744.592224514084
(2014-Mar-28.09222451)
3.1266e-05 TDB
node 101.0300180106694 9.0331e-06 deg
peri 325.2430662040936 1.2802e-05 deg
i 6.128672352746954 9.0798e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      3685  
   data-arc span      47638 days (130.43 yr)  
   first obs. used      1891-03-05  
   last obs. used      2021-08-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40374  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 06:27:50  

Additional Information
 Jupiter MOID = 1.9777 au 
 T_jup = 3.261 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.700644666836788E-16 -1.340438720793555E-15 3.255126155021115E-13 -2.794413194001941E-14 5.358825718784858E-14 1.919468104348591E-15
q -1.340438720793555E-15 3.879956717770595E-15 -9.030288322026528E-13 7.926205428284076E-14 -1.448737292855575E-13 -5.400372118424178E-15
tp 3.255126155021115E-13 -9.030288322026528E-13 9.775774468649376E-10 -1.484094601754415E-10 3.142652995481061E-10 -7.486668544967142E-12
node -2.794413194001941E-14 7.926205428284076E-14 -1.484094601754415E-10 8.159628791017571E-11 -1.070861017555605E-10 2.805513826590494E-12
peri 5.358825718784858E-14 -1.448737292855575E-13 3.142652995481061E-10 -1.070861017555605E-10 1.63896036348957E-10 -4.457826528884424E-12
i 1.919468104348591E-15 -5.400372118424178E-15 -7.486668544967142E-12 2.805513826590494E-12 -4.457826528884424E-12 8.244237544190228E-13

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 10.12   n/a MPO614063 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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