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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 49 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0881308515438062 2.5873e-08  
a 2.774230863772492 8.2563e-09 au
q 2.529735535369114 7.0087e-08 au
i 2.844632578476738 8.5215e-07 deg
node 31.55075128011675 2.1188e-05 deg
peri 297.6879628066995 2.0278e-05 deg
M 166.2533230810927 9.9118e-06 deg
tp 2458421.064540905820
(2018-Oct-29.56454091)		 4.4831e-05 TDB
period 1687.766356026696
4.62		 7.5343e-06
2.063e-08		 d
yr
n .2132996659842802 9.5219e-10 deg/d
Q 3.018726192175871 8.9839e-09 au
   Orbit Determination Parameters
   # obs. used (total)      3663  
   data-arc span      47110 days (128.98 yr)  
   first obs. used      1892-03-19  
   last obs. used      2021-03-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42774  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 10:42:56  

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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