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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 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1756921474631097 3.3769e-08  
a 3.120856743854032 1.1723e-08 au
q 2.572546720601589 1.0886e-07 au
i 2.03847782874708 3.579e-06 deg
node 121.0913978648074 0.0001107 deg
peri 300.3011819756779 0.0001112 deg
M 357.4314032242311 1.0206e-05 deg
tp 2459014.868208114107
(2020-Jun-14.36820811)
5.7107e-05 TDB
period 2013.766804456937
5.51
1.1346e-05
3.106e-08
d
yr
n .1787694579150058 1.0073e-09 deg/d
Q 3.669166767106475 1.3782e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3019  
   data-arc span      42776 days (117.11 yr)  
   first obs. used      1903-09-20  
   last obs. used      2020-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44411  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:28:46  

Additional Information
 Earth MOID = 1.58623 au 
 Jupiter MOID = 1.66671 au 
 T_jup = 3.191 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456393.5 (2013-Apr-11.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1700341777378944 3.3434e-08  
q 2.59451336618163 1.0704e-07 au
tp 2456994.359382996887
(2014-Dec-02.85938300)
5.9351e-05 TDB
node 121.2085477705344 0.00011041 deg
peri 299.6246874199055 0.00011096 deg
i 2.038079187851269 3.5825e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3019  
   data-arc span      42776 days (117.11 yr)  
   first obs. used      1903-09-20  
   last obs. used      2020-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44411  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:28:46  

Additional Information
 Jupiter MOID = 1.66671 au 
 T_jup = 3.191 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.117818280103375E-15 -3.564810745567592E-15 -1.323661899504385E-13 -3.091906582246881E-15 -2.335371408015283E-14 -1.775510491945626E-16
q -3.564810745567592E-15 1.145814071708868E-14 4.017723218783658E-13 1.20509972664876E-14 6.0439461492931E-14 6.980069222112707E-16
tp -1.323661899504385E-13 4.017723218783658E-13 3.522535959040939E-9 -6.356939602367731E-12 6.77629511062181E-10 -2.139389634535385E-13
node -3.091906582246881E-15 1.20509972664876E-14 -6.356939602367731E-12 1.219069497437908E-8 -1.218366610783514E-8 -2.828921749202625E-12
peri -2.335371408015283E-14 6.0439461492931E-14 6.77629511062181E-10 -1.218366610783514E-8 1.231242167756095E-8 2.786895483671619E-12
i -1.775510491945626E-16 6.980069222112707E-16 -2.139389634535385E-13 -2.828921749202625E-12 2.786895483671619E-12 1.283403989679173E-11

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

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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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