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22417 (1995 WK1)
Classification: Main-belt Asteroid          SPK-ID: 2022417
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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1351872067337735 2.7448e-08  
a 2.619895455787161 9.6394e-09 au
q 2.265719107184789 7.5146e-08 au
i 4.864264815992105 5.3772e-06 deg
node 43.20468414210731 4.1044e-05 deg
peri 54.28222745860439 4.6948e-05 deg
M 302.1532503165556 2.2656e-05 deg
tp 2459449.386207573532
(2021-Aug-22.88620757)
9.792e-05 TDB
period 1548.903529010457
4.24
8.5483e-06
2.34e-08
d
yr
n .2324224803270943 1.2827e-09 deg/d
Q 2.974071804389534 1.0943e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1713  
   data-arc span      16378 days (44.84 yr)  
   first obs. used      1976-05-03  
   last obs. used      2021-03-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46668  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 04:06:02  

Additional Information
 Earth MOID = 1.28636 au 
 Jupiter MOID = 2.19417 au 
 T_jup = 3.387 
[ 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 14.31   n/a E2021B10  
diameter diameter 4.925 km 0.376 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 2.95 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:
[Chang, C.-H.; Lin, H.-W.; Ip, W.-H.; Chen, W.-P.; et al. (2019) Ap. J. Supp. Ser. 241, A6.]
geometric albedo albedo 0.152   0.049 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

22417 (1995 WK1)          Discovered 1995-Nov-18 by Kobayashi, T. at Oizumi
Reference: 20010309/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1995 WK1 = 1976 JO5 = 1999 UB1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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