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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 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08788543389183992 3.7293e-08  
a 2.773338151995108 9.2972e-09 au
q 2.529602125178225 1.0347e-07 au
i 2.845232563295158 4.1603e-06 deg
node 31.56670311633002 8.0574e-05 deg
peri 297.413735518727 8.3844e-05 deg
M 38.5452102350972 2.3473e-05 deg
tp 2458419.878026095552
0.00011001 TDB
period 1686.951769337968
n .2134026630419193 1.0731e-09 deg/d
Q 3.017074178811992 1.0114e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3001  
   data-arc span      46639 days (127.69 yr)  
   first obs. used      1892-03-19  
   last obs. used      2019-11-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4657  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-03 20:05:34  

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,]
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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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2092-Oct-05 12:29 00:04 Amphi 0.0333004122449204 0.033295394896271 0.03330542977762 2.05366217157396 2.05366208751299 2485426.020153036 4.09489917084318 278.727337150227 30.9058710968036 -26.5864045051666 73743.8365179784 T 38 CATAB v2.0f-lin.ifort 2019-Dec-03 20:05:56 2019-Dec-03 20:06

Alternate Designations
 A896 BA = A922 XA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
FirstGov 2019-Dec-10 00:49 UT
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