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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1435773883662744 2.1737e-08  
a 2.906080690881549 9.1963e-09 au
q 2.488833214903118 6.22e-08 au
i 6.125984474398502 9.1922e-07 deg
node 100.9540252996085 9.1347e-06 deg
peri 324.2955247071546 1.298e-05 deg
M 129.2345211688668 7.0774e-06 deg
tp 2458550.915030436566
(2019-Mar-08.41503044)
3.4157e-05 TDB
period 1809.505594385814
4.95
8.5893e-06
2.352e-08
d
yr
n .1989493710972427 9.4436e-10 deg/d
Q 3.32332816685998 1.0517e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3372  
   data-arc span      47500 days (130.05 yr)  
   first obs. used      1891-03-05  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41758  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 18:12:44  

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

[ 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 1.99455966345094 1.99455946336052 1.99455986354135 2.71114377592008 2.54969953805073 2419707.955674911 1.43339166055432 32.6114672342267 6.81720243545031 -80.8815457752362 6876642.78911183 T 42 CATAB v2.0g-lin.ifort 2021-May-03 18:13:34 2021-May-03 18:13
1972-Jul-26 23:39 < 00:01 Jupiter 1.98399691004801 1.98399671442197 1.98399710567405 2.82343434338646 2.66794430671969 2441525.485191070 0.594482746901326 24.3215310237697 5.09110408537722 87.2277094221522 6566120.63244283 T 42 CATAB v2.0g-lin.ifort 2021-May-03 18:13:34 2021-May-03 18:13
2032-Apr-20 03:08 < 00:01 Jupiter 1.99184614125239 1.99184597980819 1.9918463026966 2.97668556022602 2.83022384734483 2463342.630772877 0.280054073538297 15.0793902460438 4.32203123778794 -79.6648953226912 8882808.47735922 T 42 CATAB v2.0g-lin.ifort 2021-May-03 18:13:34 2021-May-03 18:13
2185-Oct-02 18:10 00:02 Jupiter 1.98686665265171 1.98686625604476 1.98686704925889 2.71854711508882 2.55692726125366 2519390.257032298 2.4148746629828 53.5163203020053 8.47270403435941 -70.8207905465271 6785657.61971162 T 42 CATAB v2.0g-lin.ifort 2021-May-03 18:13:34 2021-May-03 18:13

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