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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3012591599888718 3.2659e-08  
a 2.325267563988051 5.023e-09 au
q 1.62475941091164 7.5464e-08 au
i 22.16614071065199 6.09e-06 deg
node .8499314160412794 9.5343e-06 deg
peri 59.53155576712008 1.3593e-05 deg
M 68.06399774458797 8.9474e-06 deg
tp 2458755.637217546810
(2019-Sep-29.13721755)
3.1884e-05 TDB
period 1295.11349030564
3.55
4.1965e-06
1.149e-08
d
yr
n .2779679176340307 9.0069e-10 deg/d
Q 3.025775717064461 6.5362e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1648  
   data-arc span      32562 days (89.15 yr)  
   first obs. used      1930-11-12  
   last obs. used      2020-01-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41815  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 17:53:10  

Additional Information
 Earth MOID = .722264 au 
 Jupiter MOID = 2.69682 au 
 T_jup = 3.418 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456467.5 (2013-Jun-24.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3003206864855082 3.2579e-08  
q 1.626904333332904 7.521e-08 au
tp 2456163.650035889330
(2012-Aug-24.15003589)
3.0043e-05 TDB
node .9419569014044542 9.5162e-06 deg
peri 59.28148410550001 1.365e-05 deg
i 22.18952969089053 6.0938e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1648  
   data-arc span      32562 days (89.15 yr)  
   first obs. used      1930-11-12  
   last obs. used      2020-01-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41815  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 17:53:10  

Additional Information
 Jupiter MOID = 2.69682 au 
 T_jup = 3.418 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.061413065388733E-15 -2.447674351725738E-15 -2.759081771203163E-13 3.823323475368783E-16 -9.342248466906886E-14 -4.042466581030375E-15
q -2.447674351725738E-15 5.656484808098384E-15 6.563305509634013E-13 -5.429228611011062E-16 2.204975604084798E-13 8.799331508427354E-15
tp -2.759081771203163E-13 6.563305509634013E-13 9.025637965698918E-10 -3.410548924609057E-12 3.003905175172648E-10 -7.227761301131108E-12
node 3.823323475368783E-16 -5.429228611011062E-16 -3.410548924609057E-12 9.055783757089692E-11 -8.408302796047438E-11 -3.556552686730643E-13
peri -9.342248466906886E-14 2.204975604084798E-13 3.003905175172648E-10 -8.408302796047438E-11 1.863288882398977E-10 -1.398577174074365E-12
i -4.042466581030375E-15 8.799331508427354E-15 -7.227761301131108E-12 -3.556552686730643E-13 -1.398577174074365E-12 3.713446578927186E-11

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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