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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1391702519391886 9.8895e-09  
a 1.957596644604131 4.3978e-09 au
q 1.685157426379264 1.9591e-08 au
i 21.96889692137659 9.8793e-07 deg
node 310.4166483889599 1.5517e-06 deg
peri 106.6292522722211 6.9823e-06 deg
M 1.752393924436617 6.1969e-06 deg
tp 2459195.630184778340
(2020-Dec-12.13018478)
1.7217e-05 TDB
period 1000.422025750363
2.74
3.3712e-06
9.23e-09
d
yr
n .3598481348208854 1.2126e-09 deg/d
Q 2.230035862828998 5.0099e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2142  
   data-arc span      13950 days (38.19 yr)  
   first obs. used      1983-01-13  
   last obs. used      2021-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .3409  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 21:49:06  

Additional Information
 Earth MOID = .798515 au 
 Jupiter MOID = 3.06767 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 13.69   n/a E2021B10  
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. 2020-October); 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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