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277 Elvira (A888 JA)
Classification: Main-belt Asteroid          SPK-ID: 2000277
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09228733391696241 4.1267e-08  
a 2.883744731859903 1.0157e-08 au
q 2.617611618859467 1.1959e-07 au
i 1.162778304562845 3.9888e-06 deg
node 231.2493475357103 0.00020821 deg
peri 137.0426240756332 0.00020909 deg
M 188.4929901395708 2.0436e-05 deg
tp 2459852.644063102678
(2022-Sep-30.14406310)
0.00010281 TDB
period 1788.684106653203
4.90
9.4498e-06
2.587e-08
d
yr
n .2012652757750468 1.0633e-09 deg/d
Q 3.14987784486034 1.1094e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3120  
   data-arc span      44142 days (120.85 yr)  
   first obs. used      1899-08-08  
   last obs. used      2020-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43736  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:10:40  

Additional Information
 Earth MOID = 1.61665 au 
 Jupiter MOID = 2.30904 au 
 T_jup = 3.287 
[ 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 9.9   n/a MPO502155 IRAS observations used: 17
diameter diameter 30.422 km 0.075 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 29.69 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Binzel, R.P. (1987) Icarus 72, 135-208.]
[Slivan, S.M.; Binzel, R.P. (1996) Icarus 124, 452-470.]
[Slivan, S.M.; Binzel, R.P.; Crespo da Silva, L.D.; Kaasalainen, M.; et al. (2003) Icarus 162, 285-307.]
[Slivan, S.M.; Binzel, R.P.; Kaasalianen, M.; Hock, A.N.; et al. (2009) Icarus 200, 514-530.]
[Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.]
geometric albedo albedo 0.196   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.806   0.077 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=5.91, mean=7.63, max.=9.35) deg.
U-B UB 0.436   0.048 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=5.91, mean=7.63, max.=9.35) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices

277 Elvira (A888 JA)          Discovered 1888-May-03 by Charlois, A. at Nice
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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