Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Near-Earth Object (NEO) Program
Search JPL
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
4015 Wilson-Harrington (1979 VA)
Classification: Apollo [NEO, PHA]          SPK-ID: 2004015
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 153 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6235036964040729 2.946e-08  
a 2.640452479979323 3.1009e-09 AU
q .9941205985329139 7.7872e-08 AU
i 2.784742594841732 5.5903e-06 deg
node 270.4063145247812 7.8987e-05 deg
peri 91.44810348118504 7.9077e-05 deg
M 24.51559511285644 2.4704e-06 deg
tp 2456693.777522114776
(2014-Feb-05.27752211)
1.0617e-05 JED
period 1567.169463429925
4.29
2.7607e-06
7.558e-09
d
yr
n .2297135111426303 4.0465e-10 deg/d
Q 4.286784361425733 5.0343e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      873  
   data-arc span      23262 days (63.69 yr)  
   first obs. used      1949-11-19  
   last obs. used      2013-07-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .65871  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-09 17:57:32  

Additional Information
 Earth MOID = .0472717 AU 
 T_jup = 3.083 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.99 mag n/a PDS3 (MPC 17270)  
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 Asteroid Lightcurve DataBase (Rev. 2013-Sep-12) 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 .666 mag .018 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=3; phase (min.=17.84, mean=18.14, max.=18.45) deg.
U-B UB .279 mag .028 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #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 (675)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1979 VA = 107P 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2014-Jul-22 15:27 UT
(server date/time)  
NASA Home Page
Site Manager:   Donald K. Yeomans
Webmaster  Alan B. Chamberlin