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21495 Feaga (1998 JP2)
Classification: Main-belt Asteroid          SPK-ID: 2021495
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 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1681364295977027 3.2342e-08  
a 2.269957804034401 6.3086e-09 au
q 1.888295203526615 7.2688e-08 au
i 8.872767099928009 3.1339e-06 deg
node 93.05016395897138 2.3702e-05 deg
peri 215.6345389518137 2.5612e-05 deg
M 157.527510378289 1.0034e-05 deg
tp 2458653.888188741726
(2019-Jun-19.38818874)
3.4551e-05 TDB
period 1249.180232585582
3.42
5.2075e-06
1.426e-08
d
yr
n .2881889983600396 1.2014e-09 deg/d
Q 2.651620404542187 7.3693e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1893  
   data-arc span      25844 days (70.76 yr)  
   first obs. used      1950-04-20  
   last obs. used      2021-01-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49002  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:52:52  

Additional Information
 Earth MOID = .878849 au 
 Jupiter MOID = 2.59042 au 
 T_jup = 3.579 
[ 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 14.53   n/a E2020-QM5  
diameter diameter 3.588 km 0.139 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.261   0.056 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21495 Feaga           Discovered 1998 May 1 by the Lowell Observatory Near-Earth Object Search at the Anderson Mesa Station.
Lori Michele (Lanier) Feaga (b. 1975) is a spectroscopist from the ultraviolet to the infrared. She has studied planetary satellites, including the discovery of chlorine in the atmosphere of Jupiter I (Io); and comets, most notably demonstrating the chemical heterogeneity in the natural outgassing by comet 9P/Tempel.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20080718/MPCPages.arcLast Updated: 2008-07-18
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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