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JPL Small-Body Database Browser
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1157 Arabia (1929 QC)
Classification: Main-belt Asteroid          SPK-ID: 2001157
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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1451409645113388 3.6321e-08  
a 3.185227232012319 1.7258e-08 au
q 2.722920279370269 1.2048e-07 au
i 9.548293761699215 4.5407e-06 deg
node 336.0852787597392 2.3509e-05 deg
peri 312.7659417007009 2.8258e-05 deg
M 10.21431708253731 1.7016e-05 deg
tp 2458941.586355238685
(2020-Apr-02.08635524)
9.7992e-05 TDB
period 2076.390613556818
5.68
1.6876e-05
4.62e-08
d
yr
n .1733777824122055 1.4091e-09 deg/d
Q 3.647534184654369 1.9763e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2570  
   data-arc span      32885 days (90.03 yr)  
   first obs. used      1929-08-31  
   last obs. used      2019-09-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46676  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:47:01  

Additional Information
 Earth MOID = 1.71808 au 
 Jupiter MOID = 1.65529 au 
 T_jup = 3.160 
[ show covariance matrix ]

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 10.0   n/a MPO448923  
diameter diameter 29.113 km 4.433 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 15.225 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Caspari, P.V. (2008) Minor Planet Bull. 35, 185-186.]
geometric albedo albedo 0.247   0.242 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

1157 Arabia (1929 QC)          Discovered 1929-Aug-31 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1929 QC = 1955 EC 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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