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23494 (1991 SE2)
Classification: Main-belt Asteroid          SPK-ID: 2023494
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .229203241903821 4.5391e-08  
a 2.360825692609606 1.1722e-08 au
q 1.81971679029365 1.0783e-07 au
i 2.422045477227409 5.2343e-06 deg
node 168.1129740222415 0.00011069 deg
peri 145.6592006159362 0.0001113 deg
M 329.1705392089073 1.5038e-05 deg
tp 2457713.963908433664
(2016-Nov-21.46390843)
5.5819e-05 JED
period 1324.934202155117
3.63
9.868e-06
2.702e-08
d
yr
n .2717116060664972 2.0237e-09 deg/d
Q 2.901934594925561 1.4409e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1228  
   data-arc span      23110 days (63.27 yr)  
   first obs. used      1953-01-09  
   last obs. used      2016-04-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49504  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 13:41:19  

Additional Information
 Earth MOID = .805967 au 
 Jupiter MOID = 2.38306 au 
 T_jup = 3.514 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.5 mag n/a MPO337457  
rotation period rot_per 4.343 h n/a LCDB (Rev. 2016-February); 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. (2016) Astron. J. 150, A75.]

23494 (1991 SE2)          Discovered 1991-Sep-16 by Holt, H. E. at Palomar
Reference: 20010408/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1991 SE2 = 1994 GM 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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