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249920 (2001 SK288)
Classification: Main-belt Asteroid          SPK-ID: 2249920
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1844311732457114 5.5104e-08  
a 2.732632930315558 1.392e-08 au
q 2.228650232927593 1.5153e-07 au
i 12.1139585417904 7.1901e-06 deg
node 342.1944784605882 2.0537e-05 deg
peri 36.6354239782879 2.5383e-05 deg
M 40.78829679246471 1.4948e-05 deg
tp 2458813.559481350020
(2019-Nov-26.05948135)
6.8154e-05 TDB
period 1649.948441250567
4.52
1.2608e-05
3.452e-08
d
yr
n .2181886360807375 1.6672e-09 deg/d
Q 3.236615627703522 1.6488e-08 au
  Orbit Determination Parameters
   # obs. used (total)      375  
   data-arc span      6999 days (19.16 yr)  
   first obs. used      2001-08-17  
   last obs. used      2020-10-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55953  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 00:14:22  

Additional Information
 Earth MOID = 1.24126 au 
 Jupiter MOID = 2.28569 au 
 T_jup = 3.297 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457089.5 (2015-Mar-08.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1856879326256005 5.5957e-08  
q 2.224515150524246 1.5445e-07 au
tp 2457158.249819379579
(2015-May-15.74981938)
6.4595e-05 TDB
node 342.4165630116124 2.0452e-05 deg
peri 35.44505562446017 2.5207e-05 deg
i 12.14777726743297 7.2028e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      375  
   data-arc span      6999 days (19.16 yr)  
   first obs. used      2001-08-17  
   last obs. used      2020-10-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55953  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 00:14:22  

Additional Information
 Jupiter MOID = 2.28569 au 
 T_jup = 3.297 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.13116328500413E-15 -8.619234681803558E-15 -1.728674116458124E-12 2.201550181147303E-14 -3.993924926009606E-13 -1.238786491502928E-14
q -8.619234681803558E-15 2.385479131254148E-14 4.814944317356967E-12 -6.249182365362851E-14 1.110392208108754E-12 3.554250144050564E-14
tp -1.728674116458124E-12 4.814944317356967E-12 4.172550907233579E-9 -1.915490575052873E-11 9.652607376236764E-10 1.74772505222033E-11
node 2.201550181147303E-14 -6.249182365362851E-14 -1.915490575052873E-11 4.182825435804977E-10 -4.122384294648245E-10 1.559675735395397E-12
peri -3.993924926009606E-13 1.110392208108754E-12 9.652607376236764E-10 -4.122384294648245E-10 6.353981074993731E-10 2.222753869505009E-12
i -1.238786491502928E-14 3.554250144050564E-14 1.74772505222033E-11 1.559675735395397E-12 2.222753869505009E-12 5.188028774968953E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.9   n/a MPO494362  
diameter diameter 2.007 km 0.164 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.277   0.060 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

249920 (2001 SK288)          Discovered 2001-Sep-28 by NEAT at Palomar
Reference: 20100923/Numbers.arcLast Updated: 2010-09-27

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