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3497 Innanen (1941 HJ)
Classification: Main-belt Asteroid          SPK-ID: 2003497
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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1514154112715906 5.9332e-08  
a 2.688409547353067 1.9748e-08 AU
q 2.281342910074132 1.5927e-07 AU
i 11.31808838823607 8.3928e-06 deg
node 161.9613500306559 3.1045e-05 deg
peri 62.22732814939014 4.2135e-05 deg
M 248.7227489833003 3.0523e-05 deg
tp 2457498.174579311608
0.00013844 JED
period 1610.05818273936
n .2235944041397898 2.4637e-09 deg/d
Q 3.095476184632002 2.2739e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1172  
   data-arc span      26947 days (73.78 yr)  
   first obs. used      1941-04-19  
   last obs. used      2015-01-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52276  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Mar-09 13:48:21  

Additional Information
 Earth MOID = 1.30101 AU 
 T_jup = 3.329 
[ 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 12.0 mag n/a MPO279551  
rotation period rot_per 7.181 h n/a LCDB (Rev. 2015-Feb); Warner et al., 2009 Published Reference List:
[Sauppe, J.; Torno, S.; Lemke-Oliver, R.; Ditteon, R. (2007) Minor Planet Bul. 34, 119-122.]
[Fleenor, M.L. (2007) Minor Planet Bul. 34, 66-67.]
[Brinsfield, J.W. (2007) Minor Planet Bul. 34, 108-110.]
[Behrend, R. (2007) Observatoire de Geneve web site,]

3497 Innanen (1941 HJ)          Discovered 1941-Apr-19 by Oterma, L. at Turku
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1941 HJ = 1945 EB = 1985 GV 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
FirstGov 2015-Mar-29 09:23 UT
(server date/time)  
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