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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 
[ 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 10.12   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

[ hide close-approach data ]
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
1912-Nov-01 10:56 00:01 Jupiter 1.9945596668649 1.9945594669983 1.99455986673151 2.71114377957188 2.54969954221884 2419707.955659629 1.40479639607686 31.7382217377558 6.81221713544276 -80.8886056057009 6907480.07079047 T 46 CATAB v2.0g-lin.ifort 2021-Aug-25 06:28:52 2021-Aug-25 06:28
1972-Jul-26 23:39 < 00:01 Jupiter 1.9839969126366 1.98399671756328 1.98399710770992 2.82343437588193 2.66794434131781 2441525.485189368 0.584603782163695 23.750733215979 5.0889806285114 87.1770450506397 6596187.25975617 T 46 CATAB v2.0g-lin.ifort 2021-Aug-25 06:28:52 2021-Aug-25 06:28
2032-Apr-20 03:08 < 00:01 Jupiter 1.99184614513617 1.99184598390833 1.991846306364 2.97668560636933 2.83022389616899 2463342.630777189 0.271574929548185 14.8545623164069 4.31355611428317 -79.470120165682 8994048.63623628 T 46 CATAB v2.0g-lin.ifort 2021-Aug-25 06:28:52 2021-Aug-25 06:28
2185-Oct-02 18:10 00:02 Jupiter 1.98686665148471 1.98686626234695 1.98686704062269 2.71854714181662 2.55692728957295 2519390.257049222 2.35810285173908 52.5505433862773 8.39513007231777 -70.9837400659492 6794199.04376647 T 46 CATAB v2.0g-lin.ifort 2021-Aug-25 06:28:52 2021-Aug-25 06:28

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