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3497 Innanen (1941 HJ)
Classification: Main-belt Asteroid          SPK-ID: 2003497
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1501493514782391 2.2678e-08  
a 2.688251810054156 9.9955e-09 au
q 2.284612544164322 6.2583e-08 au
i 11.32249961999931 9.0701e-07 deg
node 161.9208630282765 4.4133e-06 deg
peri 62.49251943293505 7.8765e-06 deg
M 20.20792606085653 4.6701e-06 deg
tp 2459110.130352009730
(2020-Sep-17.63035201)
2.0818e-05 TDB
period 1609.916484181674
4.41
8.979e-06
2.458e-08
d
yr
n .2236140840454772 1.2472e-09 deg/d
Q 3.09189107594399 1.1496e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2900  
   data-arc span      29189 days (79.92 yr)  
   first obs. used      1941-04-19  
   last obs. used      2021-03-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43062  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 21:01:05  

Additional Information
 Earth MOID = 1.30186 au 
 Jupiter MOID = 1.94685 au 
 T_jup = 3.329 
[ 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 12.22   n/a E2021B10  
diameter diameter 18.212 km 0.163 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 7.181 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Behrend, R. (2007) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Brinsfield, J.W. (2007) Minor Planet Bull. 34, 108-110.]
[Fleenor, M.L. (2007) Minor Planet Bull. 34, 66-67.]
[Sauppe, J.; Torno, S.; Lemke-Oliver, R.; Ditteon, R. (2007) Minor Planet Bull. 34, 119-122.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.086   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

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 | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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