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3421 Yangchenning (1975 WK1)
Classification: Main-belt Asteroid          SPK-ID: 2003421
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09310273126885923 2.7415e-08  
a 2.233187980174954 5.4437e-09 au
q 2.025272079783879 6.1018e-08 au
i 2.466584446109235 3.425e-06 deg
node 243.6541397942158 7.4615e-05 deg
peri 204.7293945163755 7.7786e-05 deg
M 108.133956762506 2.1554e-05 deg
tp 2458634.361040290400
(2019-May-30.86104029)
7.257e-05 TDB
period 1218.951284516015
3.34
4.4571e-06
1.22e-08
d
yr
n .2953358387434967 1.0799e-09 deg/d
Q 2.441103880566029 5.9506e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2504  
   data-arc span      24594 days (67.33 yr)  
   first obs. used      1953-03-14  
   last obs. used      2020-07-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45665  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:00:27  

Additional Information
 Earth MOID = 1.04197 au 
 Jupiter MOID = 2.70105 au 
 T_jup = 3.633 
[ 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 13.8   n/a MPO365287  
diameter diameter 3.951 km 0.104 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 4.990 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
[Benishek, V. (2019) Minor Planet Bull. 46, 208-210.]
geometric albedo albedo 0.450   0.087 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

3421 Yangchenning (1975 WK1)          Discovered 1975-Nov-26 by Purple Mountain Observatory at Nanking
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1975 WK1 = 1953 ED1 = 1978 SK7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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