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332 Siri (A892 FH)
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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 47 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08813082459117295 3.5512e-08  
a 2.774230866290426 8.6848e-09 au
q 2.529735612437967 9.791e-08 au
i 2.844634807636389 3.7594e-06 deg
node 31.55081007863598 7.718e-05 deg
peri 297.6879059630996 8.0112e-05 deg
M 166.2533185527908 2.2431e-05 deg
tp 2458421.064561074445
(2018-Oct-29.56456107)
0.00010482 TDB
period 1687.766358324458
4.62
7.9254e-06
2.17e-08
d
yr
n .2132996656938893 1.0016e-09 deg/d
Q 3.018726120142885 9.4501e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3480  
   data-arc span      47055 days (128.83 yr)  
   first obs. used      1892-03-19  
   last obs. used      2021-01-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43708  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:45:38  

Additional Information
 Earth MOID = 1.51827 au 
 Jupiter MOID = 2.25977 au 
 T_jup = 3.328 
[ 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 9.71   n/a E2021B10  
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. 2020-October); 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 (A892 FH)          Discovered 1892-Mar-19 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A892 FH = A896 BA = A922 XA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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