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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08807345889365502 3.5864e-08  
a 2.774153085256661 9.0956e-09 au
q 2.529823827537602 9.9005e-08 au
i 2.844655407322926 4.0743e-06 deg
node 31.55964211710984 7.7947e-05 deg
peri 297.5986338604495 8.1282e-05 deg
M 123.6895220283265 2.3407e-05 deg
tp 2458420.638236771793
(2018-Oct-29.13823677)
0.00010975 TDB
period 1687.69537903419
4.62
8.3001e-06
2.272e-08
d
yr
n .2133086364234851 1.0491e-09 deg/d
Q 3.018482342975719 9.8967e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3148  
   data-arc span      46705 days (127.87 yr)  
   first obs. used      1892-03-19  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45638  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:24:42  

Additional Information
 Earth MOID = 1.52028 au 
 Jupiter MOID = 2.26034 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-August); 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

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