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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09211385891539403 4.1071e-08  
a 3.018112651401858 1.3041e-08 au
q 2.740102648439861 1.2282e-07 au
i 10.04935867864558 4.5832e-06 deg
node 30.34188098229901 2.2503e-05 deg
peri 25.27725653353217 3.2808e-05 deg
M 239.6063084347373 2.434e-05 deg
tp 2459840.975949262970
(2022-Sep-18.47594926)
0.00013123 TDB
period 1915.144711794819
5.24
1.2413e-05
3.398e-08
d
yr
n .1879753513052381 1.2184e-09 deg/d
Q 3.296122654363854 1.4242e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2671  
   data-arc span      34172 days (93.56 yr)  
   first obs. used      1927-09-02  
   last obs. used      2021-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4318  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 19:10:15  

Additional Information
 Earth MOID = 1.75366 au 
 Jupiter MOID = 2.10647 au 
 T_jup = 3.217 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456145.5 (2012-Aug-06.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09591969226223888 4.0707e-08  
q 2.725849610066534 1.2172e-07 au
tp 2456024.160184078433
(2012-Apr-06.66018408)
0.0001189 TDB
node 30.46713060309864 2.2461e-05 deg
peri 26.38763472052802 3.2156e-05 deg
i 10.06436561886046 4.5885e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2671  
   data-arc span      34172 days (93.56 yr)  
   first obs. used      1927-09-02  
   last obs. used      2021-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4318  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 19:10:15  

Additional Information
 Jupiter MOID = 2.10647 au 
 T_jup = 3.217 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.657082524842863E-15 -4.930710892400007E-15 -7.345969162967759E-13 2.52854219974105E-15 -1.917136146003406E-13 -1.08863136065412E-15
q -4.930710892400007E-15 1.481694864533197E-14 2.496959359623623E-12 -8.191484408716601E-15 6.282371514280807E-13 3.061965298528766E-15
tp -7.345969162967759E-13 2.496959359623623E-12 1.413655285133099E-8 9.987796449649565E-16 2.748814540866594E-9 -3.513252282435026E-12
node 2.52854219974105E-15 -8.191484408716601E-15 9.987796449649565E-16 5.044868121001411E-10 -4.966098525318582E-10 -9.642514040625078E-12
peri -1.917136146003406E-13 6.282371514280807E-13 2.748814540866594E-9 -4.966098525318582E-10 1.034026983676029E-9 8.872641073200597E-12
i -1.08863136065412E-15 3.061965298528766E-15 -3.513252282435026E-12 -9.642514040625078E-12 8.872641073200597E-12 2.105412925332455E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 9.86   n/a E2021B10 IRAS observations used: 3
diameter diameter 37.498 km 0.493 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 5.794 h n/a LCDB (Rev. 2020-October); 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] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
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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