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515 Athalia (A903 SH)
Classification: Main-belt Asteroid          SPK-ID: 2000515
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 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .175692145982081 3.5455e-08  
a 3.120856744502979 1.2537e-08 au
q 2.5725467257586 1.151e-07 au
i 2.038477950544569 3.6118e-06 deg
node 121.091405576079 0.00011469 deg
peri 300.3011745747818 0.00011517 deg
M 357.4314027075679 1.0677e-05 deg
tp 2459014.868211008698
(2020-Jun-14.36821101)
5.9751e-05 TDB
period 2013.766805085047
5.51
1.2134e-05
3.322e-08
d
yr
n .1787694578592461 1.0772e-09 deg/d
Q 3.669166763247359 1.4739e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2861  
   data-arc span      42690 days (116.88 yr)  
   first obs. used      1903-09-20  
   last obs. used      2020-08-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45379  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:17:17  

Additional Information
 Earth MOID = 1.58623 au 
 Jupiter MOID = 1.66671 au 
 T_jup = 3.191 
[ 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 10.8   n/a MPO502158 IRAS observations used: 8
diameter diameter 41.190 km 0.146 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 10.636 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Pilcher, F. (2015) Minor Planet Bull. 42, 91-94.]
geometric albedo albedo 0.039   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.875   0.029 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=9.50 deg.
U-B UB 0.415   0.050 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=9.50 deg.
Tholen spectral type spec_T I   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B Cb   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)

515 Athalia (A903 SH)          Discovered 1903-Sep-20 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A903 SH = 1931 TQ = 1937 WO = 1937 WQ = 1937 WR = 1937 YH = 1953 TD = 1974 QA3 = 1977 CF 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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