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364 Isara (A893 FE)
Classification: Main-belt Asteroid          SPK-ID: 2000364
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 81 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .148590063428983 2.1179e-08  
a 2.220609596715029 4.278e-09 au
q 1.890649075888134 4.7246e-08 au
i 6.004634276429505 9.0613e-07 deg
node 105.5266777783088 9.3358e-06 deg
peri 313.0997636625519 1.0544e-05 deg
M 17.65650580274461 5.8974e-06 deg
tp 2459337.219889279951
(2021-May-02.71988928)
1.9729e-05 TDB
period 1208.667224287404
3.31
3.4928e-06
9.563e-09
d
yr
n .297848731864344 8.6071e-10 deg/d
Q 2.550570117541923 4.9137e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3254  
   data-arc span      46724 days (127.92 yr)  
   first obs. used      1893-03-20  
   last obs. used      2021-02-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44283  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 09:18:58  

Additional Information
 Earth MOID = .90887 au 
 Jupiter MOID = 2.75856 au 
 T_jup = 3.628 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 9.87   n/a E2021B10 IRAS observations used: 15
diameter diameter 25.901 km 0.665 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 9.156 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Yang, X.-y.; Zhang, Y.-y.; Li, X.-q. (1965) Acta Astron. Sin. 13, 66-74.]
[Behrend, R. (2009) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Warner, B.D. (2009) Minor Planet Bull. 36, 172-176.]
[Kryszczynska, A.; Colas, F.; Polinska, M.; Hirsch, R.; et al. (2012) Astron. Astrophys. 546, A72.]
[Hanus, J.; Broz, M.; Durech, J.; Warner, B.D.; et al. (2013) Astron. Astrophys. 559, A134.]
[Erasmus, N.; Navarro-Meza, S.; McNeill, A.; Trilling, D.E.; et al. (2020) Ap. J. Suppl. Ser. 247, A13.]
geometric albedo albedo 0.300   0.037 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.912   0.069 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=17.26, mean=21.88, max.=26.49) deg.
U-B UB 0.538   0.021 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=17.26, mean=21.88, max.=26.49) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices

364 Isara (A893 FE)          Discovered 1893-Mar-19 by Charlois, A. at Nice
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A893 FE = 1976 AB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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