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22424 (1995 YS21)
Classification: Main-belt Asteroid          SPK-ID: 2022424
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1034549147607085 3.2722e-08  
a 2.733631053162874 1.1171e-08 au
q 2.450823485570683 9.2113e-08 au
i 4.836861644853918 3.6633e-06 deg
node 107.3113179530057 5.0302e-05 deg
peri 239.8090198193559 5.4817e-05 deg
M 304.8135919935884 2.3406e-05 deg
tp 2459453.568390182330
(2021-Aug-27.06839018)
0.0001078 TDB
period 1650.852515261626
4.52
1.0119e-05
2.77e-08
d
yr
n .2180691471054563 1.3367e-09 deg/d
Q 3.016438620755064 1.2326e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1969  
   data-arc span      10416 days (28.52 yr)  
   first obs. used      1992-03-02  
   last obs. used      2020-09-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50817  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 04:06:07  

Additional Information
 Earth MOID = 1.44612 au 
 Jupiter MOID = 2.35746 au 
 T_jup = 3.340 
[ show covariance matrix ]

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 13.79   n/a E2021B10  
diameter diameter 4.134 km 0.130 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 6.823 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.]
geometric albedo albedo 0.495   0.051 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

22424 (1995 YS21)          Discovered 1995-Dec-20 by JPL/GEODSS NEAT at Haleakala
Reference: 20010309/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1995 YS21 = 1992 EC21 = 1998 MM35 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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