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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08807346179814235 3.5543e-08  
a 2.774153084508201 9.0304e-09 au
q 2.52982381879757 9.797e-08 au
i 2.844655497315168 4.0304e-06 deg
node 31.55964137778674 7.7521e-05 deg
peri 297.5986354766951 8.0858e-05 deg
M 123.689521601697 2.3389e-05 deg
tp 2458420.638239006519
(2018-Oct-29.13823901)
0.00010966 TDB
period 1687.695378351186
4.62
8.2406e-06
2.256e-08
d
yr
n .2133086365098103 1.0415e-09 deg/d
Q 3.018482350218834 9.8257e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3247  
   data-arc span      46785 days (128.09 yr)  
   first obs. used      1892-03-19  
   last obs. used      2020-04-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45089  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:03:38  

Additional Information
 Earth MOID = 1.52028 au 
 Jupiter MOID = 2.26034 au 
 T_jup = 3.329 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455957.5 (2012-Jan-31.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09083304850952 3.5839e-08  
q 2.520603423818515 9.9102e-08 au
tp 2456728.199602453911
(2014-Mar-11.69960245)
0.0001056 TDB
node 31.59727207573967 7.7507e-05 deg
peri 296.6071126355662 8.0599e-05 deg
i 2.847997717860091 4.0286e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3247  
   data-arc span      46785 days (128.09 yr)  
   first obs. used      1892-03-19  
   last obs. used      2020-04-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45089  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:03:38  

Additional Information
 Jupiter MOID = 2.26034 au 
 T_jup = 3.329 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.284448433643184E-15 -3.539854174931565E-15 2.628347740947186E-13 2.548351295488053E-15 3.056349259812231E-14 3.637750282413332E-17
q -3.539854174931565E-15 9.821197562684672E-15 -7.838225788184846E-13 -6.358375667827505E-15 -1.049662146246715E-13 -2.3890637621204E-17
tp 2.628347740947186E-13 -7.838225788184846E-13 1.115158587708662E-8 1.1244069042365E-11 2.349268904337698E-9 -5.07575722853077E-13
node 2.548351295488053E-15 -6.358375667827505E-15 1.1244069042365E-11 6.007382159826051E-9 -5.997199403122971E-9 -2.234283421071486E-14
peri 3.056349259812231E-14 -1.049662146246715E-13 2.349268904337698E-9 -5.997199403122971E-9 6.496199907353041E-9 -9.287441418664415E-14
i 3.637750282413332E-17 -2.3890637621204E-17 -5.07575722853077E-13 -2.234283421071486E-14 -9.287441418664415E-14 1.622961214747761E-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-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 (A892 FH)          Discovered 1892-Mar-19 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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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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