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4015 Wilson-Harrington (1979 VA)
Classification: Apollo [NEO, PHA]          SPK-ID: 2004015
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 189 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6314028135232529 3.8393e-08  
a 2.625557507120584 4.7962e-09 au
q .9677731100575491 1.0185e-07 au
i 2.798390803936604 4.9903e-06 deg
node 266.8048419404685 9.7894e-05 deg
peri 95.38603355345562 9.7889e-05 deg
M 217.3430574363347 3.2004e-06 deg
tp 2459816.273706411146
(2022-Aug-24.77370641)
1.5078e-05 TDB
period 1553.927417230894
4.25
4.2579e-06
1.166e-08
d
yr
n .2316710523336551 6.348e-10 deg/d
Q 4.283341904183619 7.8245e-09 au
  Orbit Determination Parameters
   # obs. used (total)      997  
   data-arc span      26104 days (71.47 yr)  
   first obs. used      1949-11-19  
   last obs. used      2021-05-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54955  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-10 05:54:06  

Additional Information
 Earth MOID = .0428218 au 
 Jupiter MOID = 1.22493 au 
 T_jup = 3.082 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.02   n/a E2021B10  
diameter diameter 4 km 0.5 H. Campins et al. (1995) Planet. Space Sci., v.43, pp.733-736 based on ILM thermal model
rotation period rot_per 3.5736 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:
[Harris, A.W.; Young, J.W. (1983) Icarus 54, 59-109.]
[Urakawa, S.; Okumura, S-i.; Nishiyama, K.; Sakamoto, T.; et al. (2011) Icarus 215, 17-26.]
[Urakawa, S.; Okumura, S-i.; Nishiyama, K.; Sakamoto, T.; et al. (2012) ACM 2012, #6088.]
geometric albedo albedo 0.05   0.01 H. Campins et al. (1995) Planet. Space Sci., v.43, pp.733-736 based on ILM thermal model
B-V BV 0.666   0.018 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=17.84, mean=18.14, max.=18.45) deg.
U-B UB 0.279   0.028 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=17.84, mean=18.14, max.=18.45) deg.
Tholen spectral type spec_T CF   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 6 color indices

4015 Wilson-Harrington (1979 VA)          Discovered 1979-Nov-15 by Helin, E. F. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1979 VA = 107P 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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