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297300 (1998 SC15)
Classification: Apollo [NEO, PHA]          SPK-ID: 2297300
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 62 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4144752719813891 4.9772e-08  
a 1.272870061586421 4.9885e-09 au
q .7452968966134215 6.4298e-08 au
i 16.08206107303018 1.1863e-05 deg
node 198.7479536454356 1.051e-05 deg
peri 277.4197262609562 1.3332e-05 deg
M 78.82834949016589 7.8939e-06 deg
tp 2457485.643793754253
1.0936e-05 JED
period 524.5350754632675
n .6863220723267157 4.0347e-09 deg/d
Q 1.80044322655942 7.0562e-09 au
  Orbit Determination Parameters
   # obs. used (total)      241  
   # delay obs. used      1  
   # Doppler obs. used      2  
   data-arc span      6091 days (16.68 yr)  
   first obs. used      1998-09-23  
   last obs. used      2015-05-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55316  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-05 00:33:06  

Additional Information
 Earth MOID = .000880889 au 
 Jupiter MOID = 3.41331 au 
 T_jup = 4.953 
[ 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 19.2 mag n/a MPO241747  
diameter diameter 0.320 km 0.03 Pers. comm. Mike Nolan (Arecibo). Arecibo resolved at 0.2 us with a delay depth of 0.5-0.6 us.
rotation period rot_per 15 h n/a Pers. comm. Mike Nolan (Arecibo). Probable contact binary (bilobate) as per Arecibo radar

297300 (1998 SC15)          Discovered 1998-Sep-23 by LINEAR at Socorro
Reference: 20111012/Numbers.arcLast Updated: 2011-10-13

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
FirstGov 2016-Apr-29 15:55 UT
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