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1558 Jarnefelt (1942 BD)
Classification: Outer Main-belt Asteroid          SPK-ID: 2001558
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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02930847263260172 3.5517e-08  
a 3.229800604048048 1.558e-08 au
q 3.135140081435546 1.1478e-07 au
i 10.49523879429827 3.9979e-06 deg
node 110.8242460677393 2.1709e-05 deg
peri 293.161938126805 7.3445e-05 deg
M 205.4522866871398 7.1253e-05 deg
tp 2459510.669078259806
(2021-Oct-23.16907826)
0.00042098 TDB
period 2120.127571931308
5.80
1.5341e-05
4.2e-08
d
yr
n .1698011028987571 1.2286e-09 deg/d
Q 3.324461126660551 1.6036e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2716  
   data-arc span      39007 days (106.80 yr)  
   first obs. used      1913-01-07  
   last obs. used      2019-10-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42128  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 02:06:07  

Additional Information
 Earth MOID = 2.16427 au 
 Jupiter MOID = 1.85537 au 
 T_jup = 3.160 
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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 10.3   n/a MPO435711  
diameter diameter 54.977 km 0.559 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 18.22 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Hawkins, S.; Ditteon, R. (2008) Minor Planet Bull. 35, 1-4.]
geometric albedo albedo 0.049   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

1558 Jarnefelt (1942 BD)          Discovered 1942-Jan-20 by Oterma, L. at Turku
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1942 BD = 1929 WD1 = 1934 VX = 1937 EF = 1943 GQ = 1951 RC2 = 1972 BO = A913 AA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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