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4024 Ronan (1981 WQ)
Classification: Main-belt Asteroid          SPK-ID: 2004024
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 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1554206392512481 1.6794e-08  
a 2.28130520792935 6.6057e-09 au
q 1.926743294185769 3.9527e-08 au
i 7.764320065972819 9.2952e-07 deg
node 54.43761650289571 1.1667e-05 deg
peri 75.30322009874624 1.2416e-05 deg
M 55.20509073031201 7.732e-06 deg
tp 2459007.503184998773
(2020-Jun-07.00318500)
2.679e-05 TDB
period 1258.558811901243
3.45
5.4663e-06
1.497e-08
d
yr
n .2860414599586059 1.2424e-09 deg/d
Q 2.635867121672931 7.6323e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2601  
   data-arc span      32855 days (89.95 yr)  
   first obs. used      1931-04-09  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41888  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 21:22:09  

Additional Information
 Earth MOID = .958748 au 
 Jupiter MOID = 2.44426 au 
 T_jup = 3.577 
[ 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 13.24   n/a E2021B10  
diameter diameter 11.859 km 0.075 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 356. h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Stephens, R.D.; Warner, B.D. (2010) Minor Planet Bull. 37, 124-125.]
geometric albedo albedo 0.055   0.003 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

4024 Ronan (1981 WQ)          Discovered 1981-Nov-24 by Bowell, E. at Flagstaff (AM)
Discovered at the Anderson Mesa station, which is operated by the Lowell Observatory.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1981 WQ = 1931 GJ = 1957 WB1 = 1976 JX1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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