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1020 Arcadia (A924 EU)
Classification: Main-belt Asteroid          SPK-ID: 2001020
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04380139007444996 2.8893e-08  
a 2.78925405274208 9.5843e-09 au
q 2.667080847961183 8.0186e-08 au
i 4.0592433476997 3.5482e-06 deg
node 180.6874888321489 4.2199e-05 deg
peri 36.77339959215488 5.7622e-05 deg
M 188.4098026730997 3.995e-05 deg
tp 2459811.499355236783
(2022-Aug-19.99935524)
0.00018947 TDB
period 1701.494446847816
4.66
8.7699e-06
2.401e-08
d
yr
n .2115787099199383 1.0905e-09 deg/d
Q 2.911427257522976 1.0004e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2906  
   data-arc span      35211 days (96.40 yr)  
   first obs. used      1924-03-08  
   last obs. used      2020-08-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46523  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:26:38  

Additional Information
 Earth MOID = 1.66108 au 
 Jupiter MOID = 2.05099 au 
 T_jup = 3.325 
[ 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 12.1   n/a MPO452172  
diameter diameter 10.067 km 0.090 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 17.02 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Gartrelle, G. (2012) Minor Planet Bull. 39, 40-46.]
geometric albedo albedo 0.150   0.023 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
SMASSII spectral type spec_B S   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)

1020 Arcadia (A924 EU)          Discovered 1924-Mar-07 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A924 EU = 1954 UA2 = 1975 EQ = 1977 QO2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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