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JPL Small-Body Database Browser
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35380 (1997 WJ21)
Classification: Main-belt Asteroid          SPK-ID: 2035380
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2212004722786911 4.3715e-08  
a 2.273159846458418 6.7688e-09 au
q 1.770335814856859 9.9529e-08 au
i 5.726613903336164 4.5294e-06 deg
node 209.0479573604433 3.4995e-05 deg
peri 326.4670735496762 3.6237e-05 deg
M 127.7790964728522 7.3113e-06 deg
tp 2458556.175047660305
(2019-Mar-13.67504766)
2.5527e-05 TDB
period 1251.824337921143
3.43
5.5914e-06
1.531e-08
d
yr
n .2875802851044086 1.2845e-09 deg/d
Q 2.775983878059977 8.2661e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1321  
   data-arc span      15597 days (42.70 yr)  
   first obs. used      1976-10-22  
   last obs. used      2019-07-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50137  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 03:48:33  

Additional Information
 Earth MOID = .777679 au 
 Jupiter MOID = 2.20201 au 
 T_jup = 3.572 
[ 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 MPO474208  
rotation period rot_per 4.035 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Erasmus, N.; McNeill, A.; Mommert, N.; Trilling, D.E.; et al. (2019) Ap. J. Suppl. Series 242, A15.]
[Stephens, R. D.; Warner, B. D. (2019) MPB 46, 298-301.]

35380 (1997 WJ21)          Discovered 1997-Nov-30 by Kobayashi, T. at Oizumi
Reference: 20020227/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1997 WJ21 = 1976 UB8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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