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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 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08788543454814332 3.6787e-08  
a 2.773338151814525 9.207e-09 au
q 2.529602123193361 1.0187e-07 au
i 2.84523258282787 4.1389e-06 deg
node 31.56670266401507 7.9619e-05 deg
peri 297.413736063998 8.2922e-05 deg
M 38.5452102307944 2.3472e-05 deg
tp 2458419.878026133357
(2018-Oct-28.37802613)
0.00011001 TDB
period 1686.951769173202
4.62
8.4006e-06
2.3e-08
d
yr
n .2134026630627625 1.0627e-09 deg/d
Q 3.017074180435689 1.0016e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3038  
   data-arc span      46645 days (127.71 yr)  
   first obs. used      1892-03-19  
   last obs. used      2019-12-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46355  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 20:41:00  

Additional Information
 Earth MOID = 1.51913 au 
 Jupiter MOID = 2.25934 au 
 T_jup = 3.329 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455735.5 (2011-Jun-23.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09112124874300831 3.7092e-08  
q 2.519144328067199 1.0305e-07 au
tp 2455042.391131693277
(2009-Jul-29.89113169)
0.00010636 TDB
node 31.59352853512829 7.9633e-05 deg
peri 296.6072128011435 8.2658e-05 deg
i 2.848086117946369 4.1369e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3038  
   data-arc span      46645 days (127.71 yr)  
   first obs. used      1892-03-19  
   last obs. used      2019-12-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46355  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 20:41:00  

Additional Information
 Jupiter MOID = 2.25934 au 
 T_jup = 3.329 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.375814708494087E-15 -3.809847068192261E-15 3.043263796910371E-13 2.717421790078401E-15 4.700121830925052E-14 4.922787132434572E-17
q -3.809847068192261E-15 1.061968897047512E-14 -9.804997779123529E-13 -6.839577015974949E-15 -1.5460038894226E-13 -6.897940173053549E-17
tp 3.043263796910371E-13 -9.804997779123529E-13 1.131221850474243E-8 5.736531857634637E-12 2.374408307814776E-9 -3.405771064347051E-13
node 2.717421790078401E-15 -6.839577015974949E-15 5.736531857634637E-12 6.341420865646529E-9 -6.331850135188179E-9 -1.641680618478856E-11
peri 4.700121830925052E-14 -1.5460038894226E-13 2.374408307814776E-9 -6.331850135188179E-9 6.832347849993531E-9 1.633360109736895E-11
i 4.922787132434572E-17 -6.897940173053549E-17 -3.405771064347051E-13 -1.641680618478856E-11 1.633360109736895E-11 1.711416964489233E-11

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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