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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3012591606913503 2.9956e-08  
a 2.325267563982345 4.6308e-09 au
q 1.624759409274203 6.8534e-08 au
i 22.16613953132904 5.1451e-06 deg
node .8499330047482647 8.957e-06 deg
peri 59.53155486545865 1.2829e-05 deg
M 68.06399732588162 7.7587e-06 deg
tp 2458755.637219054023
(2019-Sep-29.13721905)
2.7733e-05 TDB
period 1295.113490300872
3.55
3.8689e-06
1.059e-08
d
yr
n .2779679176350539 8.3037e-10 deg/d
Q 3.025775718690487 6.0259e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2159  
   data-arc span      32725 days (89.60 yr)  
   first obs. used      1930-11-12  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .38292  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:27:23  

Additional Information
 Earth MOID = .722264 au 
 Jupiter MOID = 2.69682 au 
 T_jup = 3.418 
[ 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 15.9294 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
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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