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2640 Hallstrom (1941 FN)
Classification: Main-belt Asteroid          SPK-ID: 2002640
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08888158432266917 5.0056e-08  
a 2.397145071567144 8.4464e-09 au
q 2.184083019754978 1.2116e-07 au
i 6.655143043532877 4.5851e-06 deg
node 4.505606433969901 3.1021e-05 deg
peri 192.1519586762326 3.7346e-05 deg
M 353.6661531017189 2.0949e-05 deg
tp 2458624.350910570050
(2019-May-20.85091057)		 7.8897e-05 TDB
period 1355.62604261057
3.71		 7.1648e-06
1.962e-08		 d
yr
n .2655599617330581 1.4036e-09 deg/d
Q 2.61020712337931 9.1971e-09 au
   Orbit Determination Parameters
   # obs. used (total)      2092  
   data-arc span      28543 days (78.15 yr)  
   first obs. used      1941-03-18  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46134  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-29 22:09:47  

Additional Information
 Earth MOID = 1.18356 au 
 Jupiter MOID = 2.35055 au 
 T_jup = 3.514 
[ show covariance matrix ]

[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.0   n/a MPO384774  
rotation period rot_per 22.9 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Hasegawa, S.; Miyasaka, S.; Yoshizumi, C.; Sekiguchi, T.; et al. (2012) arXiv:1204.0548.]
SMASSII spectral type spec_B V   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)

2640 Hallstrom (1941 FN)          Discovered 1941-Mar-18 by Oterma, L. at Turku
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1941 FN = 1967 ET = 1976 SG5 = 1978 EM6 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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