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1170 Siva (1930 SQ)
Classification: Mars-crossing Asteroid          SPK-ID: 2001170
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3011696375244672 3.3166e-08  
a 2.325154368032966 5.0898e-09 au
q 1.624888469824046 7.6747e-08 au
i 22.1658540595031 6.2686e-06 deg
node .8556397929593276 9.5419e-06 deg
peri 59.55265114807754 1.3716e-05 deg
M 316.8603682230067 9.1388e-06 deg
tp 2458755.685109392733
(2019-Sep-29.18510939)
3.3075e-05 TDB
period 1295.018920657035
3.55
4.2522e-06
1.164e-08
d
yr
n .2779882164326618 9.1279e-10 deg/d
Q 3.025420266241886 6.6227e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1616  
   data-arc span      32532 days (89.07 yr)  
   first obs. used      1930-11-12  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42236  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 20:55:02  

Additional Information
 Earth MOID = .721885 au 
 Jupiter MOID = 2.69501 au 
 T_jup = 3.419 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.1   n/a MPO502164 IRAS observations used: 2
diameter diameter 10.37 km 0.8 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 2
rotation period rot_per 5.22 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Behrend, R. (2001) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Collaborative Asteroid Lightcurve Link (CALL) (2011) http://www.minorplanetobserver.com/DATA/submissions_results.htm]
geometric albedo albedo 0.1751   0.032 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 2
B-V BV 0.864   0.021 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=19.15 deg.
U-B UB 0.452   0.036 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=19.15 deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices

1170 Siva (1930 SQ)          Discovered 1930-Sep-29 by Delporte, E. at Uccle
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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