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503 Evelyn (A903 BL)
Classification: Main-belt Asteroid          SPK-ID: 2000503
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 55 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1761898229801972 3.1515e-08  
a 2.722686477992164 7.3351e-09 au
q 2.242976829404148 8.6446e-08 au
i 5.010119130874364 3.8146e-06 deg
node 68.89554477883894 4.2673e-05 deg
peri 41.7656828591643 4.419e-05 deg
M 45.62698234044559 1.0889e-05 deg
tp 2458792.523567494177
(2019-Nov-05.02356749)
4.9568e-05 TDB
period 1640.948225404054
4.49
6.6313e-06
1.816e-08
d
yr
n .2193853495355446 8.8656e-10 deg/d
Q 3.202396126580181 8.6275e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3299  
   data-arc span      42884 days (117.41 yr)  
   first obs. used      1903-01-19  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44485  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:15:22  

Additional Information
 Earth MOID = 1.2626 au 
 Jupiter MOID = 1.93377 au 
 T_jup = 3.330 
[ 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 9.3   n/a MPO431497  
diameter diameter 81.68 km 4.9 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 6
rotation period rot_per 38.780 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Kamel, L.; Lundgren, K. (1999) Minor Planet Bull. 26, 4-5.]
[Fauerbach, M.; Bennett, T.; Marks, S.A. (2007) Minor Planet Bull. 34, 57-58.]
[Behrend, R. (2014) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Mansego, E.A.; Rodriguez, P.B.; de Haro, J.L.; Chiner, O.R.; et al. (2016) Minor Planet Bull. 43, 332-336.]
geometric albedo albedo 0.0585   0.008 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 6
B-V BV 0.725   0.037 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=17.75 deg.
U-B UB 0.315   0.039 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=17.75 deg.
Tholen spectral type spec_T XC   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices
SMASSII spectral type spec_B Ch   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

503 Evelyn (A903 BL)          Discovered 1903-Jan-19 by Dugan, R. S. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 A903 BL = 1948 BA = 1948 DA = A899 GA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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