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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09211385902751186 4.1117e-08  
a 3.018112651458694 1.3048e-08 au
q 2.740102648153077 1.2295e-07 au
i 10.0493586017976 4.5858e-06 deg
node 30.34188100106585 2.2503e-05 deg
peri 25.27725649909693 3.281e-05 deg
M 239.6063084324698 2.434e-05 deg
tp 2459840.975949293125
(2022-Sep-18.47594929)
0.00013123 TDB
period 1915.144711848917
5.24
1.2419e-05
3.4e-08
d
yr
n .1879753512999282 1.219e-09 deg/d
Q 3.29612265476431 1.425e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2665  
   data-arc span      34006 days (93.10 yr)  
   first obs. used      1927-09-02  
   last obs. used      2020-10-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43164  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 11:57:28  

Additional Information
 Earth MOID = 1.75366 au 
 Jupiter MOID = 2.10647 au 
 T_jup = 3.217 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456142.5 (2012-Aug-03.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09592883433856284 4.075e-08  
q 2.725857991075619 1.2184e-07 au
tp 2456024.184777856558
(2012-Apr-06.68477786)
0.0001189 TDB
node 30.46756013391409 2.246e-05 deg
peri 26.39276837520936 3.2157e-05 deg
i 10.06442071569723 4.5911e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2665  
   data-arc span      34006 days (93.10 yr)  
   first obs. used      1927-09-02  
   last obs. used      2020-10-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43164  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 11:57:28  

Additional Information
 Jupiter MOID = 2.10647 au 
 T_jup = 3.217 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.660559410355366E-15 -4.94059584639015E-15 -7.373109561265473E-13 2.531428207585506E-15 -1.924775903142435E-13 -1.092687714789261E-15
q -4.94059584639015E-15 1.484512076614908E-14 2.504714804989963E-12 -8.162732478992929E-15 6.303721080389644E-13 3.068104362132446E-15
tp -7.373109561265473E-13 2.504714804989963E-12 1.413714442481923E-8 3.592280689557921E-14 2.749041104268468E-9 -3.514948844390977E-12
node 2.531428207585506E-15 -8.162732478992929E-15 3.592280689557921E-14 5.04472908686723E-10 -4.965882708055125E-10 -9.648503210518502E-12
peri -1.924775903142435E-13 6.303721080389644E-13 2.749041104268468E-9 -4.965882708055125E-10 1.034091878837325E-9 8.878155257055065E-12
i -1.092687714789261E-15 3.068104362132446E-15 -3.514948844390977E-12 -9.648503210518502E-12 8.878155257055065E-12 2.107815280424921E-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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