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2379 Heiskanen (1941 ST)
Classification: Main-belt Asteroid          SPK-ID: 2002379
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2769671422352646 4.1311e-08  
a 3.165219704161212 1.6268e-08 au
q 2.288557848152931 1.3359e-07 au
i .4691738401391223 4.7161e-06 deg
node 151.3258147327325 0.0004583 deg
peri 176.6978144631114 0.00045835 deg
M 310.9196188415758 8.3055e-06 deg
tp 2459280.920425439343
(2021-Mar-07.42042544)
4.8522e-05 TDB
period 2056.8575625423
5.63
1.5858e-05
4.342e-08
d
yr
n .1750242732195008 1.3494e-09 deg/d
Q 4.041881560169492 2.0774e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2674  
   data-arc span      28621 days (78.36 yr)  
   first obs. used      1941-09-21  
   last obs. used      2020-01-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48278  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 16:19:57  

Additional Information
 Earth MOID = 1.27726 au 
 Jupiter MOID = 1.32829 au 
 T_jup = 3.143 
[ 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 10.90   n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 7
diameter diameter 33.157 km 0.415 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 3.76 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Garceran, A.C.; Aznar, A.; Mansego, E.A.; Rodriguez, P.B.; et al. (2016) Minor Planet Bull. 43, 92-97.]
[Schmidt, R.E. (2016) Minor Planet Bull. 43, 129-131.]
geometric albedo albedo 0.070   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.661   0.027 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=6.64, mean=8.18, max.=9.73) deg.
U-B UB 0.322   0.036 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=6.64, mean=8.18, max.=9.73) deg.
Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo

2379 Heiskanen (1941 ST)          Discovered 1941-Sep-21 by Vaisala, Y. at Turku
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1941 ST = 1935 QD1 = 1953 VL = 1953 XT = 1964 RD = 1965 YD = 1966 BH = 1970 RM = 1971 YA = 1974 FR = 1975 NK = 1976 US5 = 2010 VT27 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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