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JPL Small-Body Database Browser
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332 Siri
Classification: Main-belt Asteroid          SPK-ID: 2000332
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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08788543209580453 3.7956e-08  
a 2.773338152357668 9.4154e-09 au
q 2.529602130489934 1.0557e-07 au
i 2.845232659853341 4.1841e-06 deg
node 31.56669977220848 8.1779e-05 deg
peri 297.413738610183 8.5009e-05 deg
M 38.54521026249022 2.3473e-05 deg
tp 2458419.878025931770
(2018-Oct-28.37802593)
0.00011001 TDB
period 1686.951769668772
4.62
8.5908e-06
2.352e-08
d
yr
n .213402663000072 1.0867e-09 deg/d
Q 3.017074174225401 1.0243e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2955  
   data-arc span      46611 days (127.61 yr)  
   first obs. used      1892-03-19  
   last obs. used      2019-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46904  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 01:52:14  

Additional Information
 Earth MOID = 1.51913 au 
 Jupiter MOID = 2.25934 au 
 T_jup = 3.329 
[ 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 9.7   n/a MPO319084  
diameter diameter 40.37 km 1.8 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 6
rotation period rot_per 8.0074 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Higgins, D.; Pravec, P.; Kusnirak, P.; Hornoch, K.; Brinsfield, J.W.; Allen, B.; Warner, B.D. (2008) Minor Planet Bull. 35, 123-126.]
[Behrend, R. (2010) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.1719   0.017 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 6
SMASSII spectral type spec_B Xk   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)

332 Siri          Discovered 1892-Mar-19 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 A896 BA = A922 XA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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