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30800 (1989 ST)
Classification: Mars-crossing Asteroid          SPK-ID: 2030800
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2752408772271184 3.1438e-08  
a 2.272505855649877 6.3444e-09 au
q 1.647019350437042 6.9831e-08 au
i 4.488357343417101 3.0556e-06 deg
node 292.3930708545446 4.8328e-05 deg
peri 23.06177175673219 4.8855e-05 deg
M 71.37919384924867 9.2783e-06 deg
tp 2458952.400961431448
(2020-Apr-12.90096143)
3.1647e-05 TDB
period 1251.284149738531
3.43
5.24e-06
1.435e-08
d
yr
n .2877044355394623 1.2048e-09 deg/d
Q 2.897992360862713 8.0906e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1984  
   data-arc span      23853 days (65.31 yr)  
   first obs. used      1955-10-23  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44739  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 06:40:14  

Additional Information
 Earth MOID = .632408 au 
 Jupiter MOID = 2.40923 au 
 T_jup = 3.556 
[ 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 14.71   n/a E2021B10  
rotation period rot_per 2.740 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

30800 (1989 ST)          Discovered 1989-Sep-29 by Ueda, S., Kaneda, H. at Kushiro
Reference: 20011130/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1989 ST = 1999 NV12 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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