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120728 (1997 SG32)
Classification: Main-belt Asteroid          SPK-ID: 2120728
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09869441603327792 4.848e-08  
a 2.423640881619407 1.0499e-08 au
q 2.184441060133601 1.1464e-07 au
i 4.07789956055804 3.6411e-06 deg
node 143.5351942738458 7.1849e-05 deg
peri 230.4040181052785 7.5474e-05 deg
M 46.59139003986315 2.1794e-05 deg
tp 2459022.137316388509
(2020-Jun-21.63731639)
8.3417e-05 TDB
period 1378.163777582053
3.77
8.9553e-06
2.452e-08
d
yr
n .2612171396868441 1.6974e-09 deg/d
Q 2.662840703105214 1.1535e-08 au
  Orbit Determination Parameters
   # obs. used (total)      685  
   data-arc span      9542 days (26.12 yr)  
   first obs. used      1994-12-28  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57781  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 17:07:52  

Additional Information
 Earth MOID = 1.18568 au 
 Jupiter MOID = 2.76963 au 
 T_jup = 3.502 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457613.5 (2016-Aug-13.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1001747370724423 4.8675e-08  
q 2.180882498387638 1.1531e-07 au
tp 2457642.887222190816
(2016-Sep-11.38722219)
8.2139e-05 TDB
node 143.6179647582842 7.191e-05 deg
peri 230.0946387011122 7.5396e-05 deg
i 4.07648906776817 3.6403e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      685  
   data-arc span      9542 days (26.12 yr)  
   first obs. used      1994-12-28  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57781  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 17:07:52  

Additional Information
 Jupiter MOID = 2.76963 au 
 T_jup = 3.502 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.36927087804801E-15 -5.595847369108685E-15 9.371315185081611E-13 1.079690679309503E-14 1.790716665706113E-13 -2.085108365062804E-15
q -5.595847369108685E-15 1.329587613846667E-14 -2.345965481930237E-12 -2.340578533623638E-14 -4.641714346504016E-13 5.058269882990471E-15
tp 9.371315185081611E-13 -2.345965481930237E-12 6.746816050746602E-9 -1.375604667917484E-11 1.886188104162205E-9 -2.865166716148941E-12
node 1.079690679309503E-14 -2.340578533623638E-14 -1.375604667917484E-11 5.171112104836889E-9 -5.162179596368599E-9 2.53176269843013E-11
peri 1.790716665706113E-13 -4.641714346504016E-13 1.886188104162205E-9 -5.162179596368599E-9 5.684551228394072E-9 -2.601504009417255E-11
i -2.085108365062804E-15 5.058269882990471E-15 -2.865166716148941E-12 2.53176269843013E-11 -2.601504009417255E-11 1.325208627085832E-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 16.18   n/a E2021B55  
rotation period rot_per 4.48 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Erasmus, N.; McNeill, A.; Mommert, N.; Trilling, D.E.; et al. (2019) Ap. J. Suppl. Series 242, A15.]

120728 (1997 SG32)          Discovered 1997-Sep-28 by AMOS at Haleakala
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

[ show close-approach data ]
Alternate Designations
 1997 SG32 = 2001 TB158 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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