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1024 Hale (A923 YO13)
Classification: Main-belt Asteroid          SPK-ID: 2001024
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

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Orbit Diagram
Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet was implemented using 2-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet has stopped working because of a recent Java upgrade, here is a possible workaround.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).

Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .22506936089346 4.1393e-08  
a 2.865482526260008 1.3458e-08 au
q 2.220550205423291 1.2239e-07 au
i 16.08891448039469 5.2499e-06 deg
node 58.86310441797645 1.6807e-05 deg
peri 307.9429493742749 1.9702e-05 deg
M 51.77322373126024 1.118e-05 deg
tp 2457345.700963994844
5.4506e-05 JED
period 1771.719942300441
n .2031923846454919 1.4315e-09 deg/d
Q 3.510414847096725 1.6487e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1466  
   data-arc span      31845 days (87.19 yr)  
   first obs. used      1928-12-08  
   last obs. used      2016-02-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50355  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Feb-25 17:43:53  

Additional Information
 Earth MOID = 1.25849 au 
 Jupiter MOID = 2.07231 au 
 T_jup = 3.205 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.8 mag n/a MPO347522  
diameter diameter 41.36 km 3.1 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 11
rotation period rot_per 16.0 h n/a LCDB (Rev. 2016-February); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Alkema, M.S. (2013) Minor Planet Bul. 40, 133-137.]
geometric albedo albedo 0.0594   0.010 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 11
SMASSII spectral type spec_B Ch   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

1024 Hale (A923 YO13)          Discovered 1923-Dec-02 by Van Biesbroeck, G. at Williams Bay
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
FirstGov 2016-May-01 00:27 UT
(server date/time)  
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