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4630 Chaonis (1987 WA)
Classification: Main-belt Asteroid          SPK-ID: 2004630
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 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1294595479917464 1.3237e-08  
a 2.668492040425956 1.032e-08 au
q 2.323030267052838 3.8291e-08 au
i 5.909636932701548 6.3896e-07 deg
node 62.76444368145609 1.043e-05 deg
peri 304.8066359736918 1.4425e-05 deg
M 247.0602919028083 1.111e-05 deg
tp 2459700.006857261439
(2022-Apr-30.50685726)
5.0515e-05 TDB
period 1592.198808052255
4.36
9.2363e-06
2.529e-08
d
yr
n .2261024177253279 1.3116e-09 deg/d
Q 3.013953813799073 1.1656e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2800  
   data-arc span      16932 days (46.36 yr)  
   first obs. used      1974-11-12  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46062  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 21:45:34  

Additional Information
 Earth MOID = 1.32701 au 
 Jupiter MOID = 2.46185 au 
 T_jup = 3.363 
[ 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 13.04   n/a E2021B10  
diameter diameter 7.527 km 0.096 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.398 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 0.136   0.036 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

4630 Chaonis (1987 WA)          Discovered 1987-Nov-18 by Baur, J. M. at Chions
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1987 WA = 1974 VJ1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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