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145709 Rocknowar (1981 SK9)
Classification: Main-belt Asteroid          SPK-ID: 2145709
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2091925089163496 7.5409e-08  
a 2.556460989875529 1.6343e-08 au
q 2.021668501456692 1.9962e-07 au
i 12.9916751737684 6.4992e-06 deg
node 327.5305223264925 2.0837e-05 deg
peri 66.68015765153989 2.8136e-05 deg
M 125.4215507169308 1.7348e-05 deg
tp 2458480.352102625176
(2018-Dec-27.85210263)
6.8903e-05 TDB
period 1492.990973118778
4.09
1.4317e-05
3.92e-08
d
yr
n .2411267090570409 2.3123e-09 deg/d
Q 3.091253478294365 1.9762e-08 au
  Orbit Determination Parameters
   # obs. used (total)      886  
   data-arc span      14005 days (38.34 yr)  
   first obs. used      1981-09-28  
   last obs. used      2020-02-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47475  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 08:32:15  

Additional Information
 Earth MOID = 1.0652 au 
 Jupiter MOID = 2.53073 au 
 T_jup = 3.371 
[ 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 15.1   n/a MPO453923  
diameter diameter 2.256 km 0.484 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.316   0.155 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

145709 Rocknowar           Discovered 1981 Sept. 28 by E. Colombini at Siding Spring.
"Rock No War" is an international association of volunteers based in Formigine in 1998 with the aim of bringing aid and of intervening in crisis situations involving children worldwide, without any distinction of race, religion or political allegiance. This will be symbolically the minor planet of solidarity.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20081212/MPCPages.arcLast Updated: 2008-12-12

Alternate Designations
 1981 SK9 = 1998 XQ44 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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