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227995 (2007 JS21)
Classification: Main-belt Asteroid          SPK-ID: 2227995
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 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06932750766105569 4.8835e-08  
a 2.993888420580403 2.5548e-08 au
q 2.786329598166269 1.4293e-07 au
i 2.296929831764202 4.7547e-06 deg
node 59.20470890806711 0.00010634 deg
peri 317.1903913969891 0.00011122 deg
M 86.08250190141577 3.0908e-05 deg
tp 2458748.056636005650
(2019-Sep-21.55663601)
0.00016307 TDB
period 1892.133795373427
5.18
2.4219e-05
6.631e-08
d
yr
n .190261386842864 2.4353e-09 deg/d
Q 3.201447242994537 2.7319e-08 au
  Orbit Determination Parameters
   # obs. used (total)      397  
   data-arc span      7296 days (19.98 yr)  
   first obs. used      2001-02-22  
   last obs. used      2021-02-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52043  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 00:41:57  

Additional Information
 Earth MOID = 1.78665 au 
 Jupiter MOID = 2.166 au 
 T_jup = 3.250 
[ 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 16.0   n/a MPO454639  
diameter diameter 3.537 km 0.660 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.047   0.017 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

227995 (2007 JS21)          Discovered 2007-May-09 by Mt. Lemmon Survey at Mount Lemmon
Reference: 20091202/Numbers.arcLast Updated: 2009-12-04

Alternate Designations
 2007 JS21 = 2001 DV78 = 2004 XP113 = 2004 YM28 = 2006 EP46 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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