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22305 (1990 SD2)
Classification: Main-belt Asteroid          SPK-ID: 2022305
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 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2024753529559792 3.2058e-08  
a 2.287735407647871 8.3771e-09 au
q 1.824525373514477 7.3552e-08 au
i 7.448898890988336 3.708e-06 deg
node 149.4799602710401 2.3803e-05 deg
peri 190.1764127328529 2.5082e-05 deg
M 283.4778396370372 9.2998e-06 deg
tp 2459469.153089553607
(2021-Sep-11.65308955)
3.3471e-05 TDB
period 1263.883713953651
3.46
6.942e-06
1.901e-08
d
yr
n .2848363310844923 1.5645e-09 deg/d
Q 2.750945441781264 1.0073e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1681  
   data-arc span      24230 days (66.34 yr)  
   first obs. used      1954-02-10  
   last obs. used      2020-06-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50289  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 04:04:06  

Additional Information
 Earth MOID = .814191 au 
 Jupiter MOID = 2.64247 au 
 T_jup = 3.562 
[ 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 14.68   n/a E2021B10  
diameter diameter 2.932 km 0.438 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 2.751 h n/a LCDB (Rev. 2020-October); 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.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.247   0.091 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

22305 (1990 SD2)          Discovered 1990-Sep-17 by Holt, H. E. at Palomar
Reference: 20010309/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1990 SD2 = 1976 QH2 = 2000 LS5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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