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4736 Johnwood (1983 AF2)
Classification: Inner Main-belt Asteroid          SPK-ID: 2004736
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1395323625507317 3.4129e-08  
a 1.957630628414255 7.2964e-09 au
q 1.684477801829941 6.7204e-08 au
i 21.96121260739133 7.0054e-06 deg
node 310.4379176893597 1.1854e-05 deg
peri 106.4173022151304 3.2864e-05 deg
M 146.0950052441177 3.159e-05 deg
tp 2458194.498702703530
(2018-Mar-16.99870270)
8.6588e-05 TDB
period 1000.448076801134
2.74
5.5932e-06
1.531e-08
d
yr
n .3598387645974351 2.0118e-09 deg/d
Q 2.23078345499857 8.3144e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1226  
   data-arc span      13264 days (36.31 yr)  
   first obs. used      1983-01-13  
   last obs. used      2019-05-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40263  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 00:40:31  

Additional Information
 Earth MOID = .798739 au 
 Jupiter MOID = 3.06977 au 
 T_jup = 3.785 
[ 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 13.6   n/a MPO381296  
diameter diameter 2.839 km 0.180 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 6.210 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Warner, B.D. (2005) Minor Planet Bull. 32, 54-58.]
[Warner, B.D. (2010) Minor Planet Bull. 37, 57-64.]
[Behrend, R. (2012) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Warner, B.D. (2013) Minor Planet Bull. 40, 137-145.]
geometric albedo albedo 0.957   0.098 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

4736 Johnwood (1983 AF2)          Discovered 1983-Jan-13 by Shoemaker, C. S. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1983 AF2 = 1987 SG7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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