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1087 Arabis (1927 RD)
Classification: Main-belt Asteroid          SPK-ID: 2001087
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 .09304190776739434 4.3464e-08  
a 3.015302098263612 1.3554e-08 au
q 2.734752638546138 1.2896e-07 au
i 10.05526105443428 4.8262e-06 deg
node 30.40616465825205 2.3395e-05 deg
peri 25.50635399126222 3.4796e-05 deg
M 201.7149796318294 2.5216e-05 deg
tp 2459841.376058590335
0.00013561 TDB
period 1912.470178090164
n .1882382293456226 1.2692e-09 deg/d
Q 3.295851557981085 1.4815e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2433  
   data-arc span      33754 days (92.41 yr)  
   first obs. used      1927-09-02  
   last obs. used      2020-01-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44944  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:45:12  

Additional Information
 Earth MOID = 1.74928 au 
 Jupiter MOID = 2.10891 au 
 T_jup = 3.218 
[ 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 9.8   n/a MPO473777 IRAS observations used: 3
diameter diameter 37.498 km 0.493 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 5.794 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Barucci, M.A.; Di Martino, M.; Dotto, E.; Fulchignoni, M.; et al. (1994) Icarus 109, 267-273.]
[Ditteon, R.; Hawkins, S. (2007) Minor Planet Bull. 34, 59-64.]
[Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.]
[Hanus, J.; Delbo, M.; Ali-Lagoa, V.; Bolin, B.; et al. (2016) Astron. Astrophys., submitted.]
[Hanus, J.; Delbo, M.; Ali-Lagoa, V.; Bolin, B.; et al. (2018) Icarus 299, 84-96.]
geometric albedo albedo 0.098   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
B-V BV 0.823   0.004 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=3.06, mean=4.31, max.=6.82) deg.
U-B UB 0.370   0.067 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=3.06, mean=5.33, max.=6.99) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo

1087 Arabis (1927 RD)          Discovered 1927-Sep-02 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1927 RD = 1973 LB = A917 UE 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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