Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 183 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6308639087606055 3.9259e-08  
a 2.626611456134698 4.9853e-09 au
q .9695770861221766 1.0424e-07 au
i 2.798292970809708 5.2571e-06 deg
node 266.8186772785051 9.8226e-05 deg
peri 95.38820833663982 9.8205e-05 deg
M 78.36583323138804 2.9754e-06 deg
tp 2458262.032921382941
(2018-May-23.53292138)
1.2235e-05 TDB
period 1554.863175414271
4.26
4.4267e-06
1.212e-08
d
yr
n .2315316265073184 6.5917e-10 deg/d
Q 4.283645826147219 8.1303e-09 au
  Orbit Determination Parameters
   # obs. used (total)      980  
   data-arc span      25304 days (69.28 yr)  
   first obs. used      1949-11-19  
   last obs. used      2019-03-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54406  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Apr-30 06:55:16  

Additional Information
 Earth MOID = .0430867 au 
 Jupiter MOID = 1.22029 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 15.99   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 LCDB (Rev. 2019-January); 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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2019-Oct-21 01:22 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin