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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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2291489750546369 4.786e-08  
a 2.361143571674944 1.2582e-08 au
q 1.820089942268786 1.1261e-07 au
i 2.421946781835937 5.3553e-06 deg
node 168.1111491166027 0.00011299 deg
peri 145.6192964701166 0.0001136 deg
M 274.8650870202017 1.5611e-05 deg
tp 2457713.891502058525
(2016-Nov-21.39150206)
5.8953e-05 JED
period 1325.201809601194
3.63
1.0593e-05
2.9e-08
d
yr
n .2716567374054056 2.1714e-09 deg/d
Q 2.902197201081103 1.5465e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1157  
   data-arc span      22757 days (62.31 yr)  
   first obs. used      1953-01-09  
   last obs. used      2015-05-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49641  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 16:45:10  

Additional Information
 Earth MOID = .804889 au 
 Jupiter MOID = 2.38146 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. 2015-December); 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.]

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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