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538 Friederike (A904 OA)
Classification: Main-belt Asteroid          SPK-ID: 2000538
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 50 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .17004594947526 3.8085e-08  
a 3.1578286234364 1.2063e-08 au
q 2.620852656884004 1.2266e-07 au
i 6.521811660278208 4.1093e-06 deg
node 141.159962307002 3.2999e-05 deg
peri 227.5039484368259 3.4547e-05 deg
M 161.253011576698 1.1494e-05 deg
tp 2458082.407169622418
(2017-Nov-24.90716962)
6.3353e-05 TDB
period 2049.657340996233
5.61
1.1744e-05
3.215e-08
d
yr
n .1756391143043561 1.0064e-09 deg/d
Q 3.694804589988796 1.4114e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3217  
   data-arc span      42336 days (115.91 yr)  
   first obs. used      1904-07-20  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42207  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:15:52  

Additional Information
 Earth MOID = 1.62511 au 
 Jupiter MOID = 1.78309 au 
 T_jup = 3.173 
[ 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 9.6   n/a MPO502158  
diameter diameter 70.640 km 0.353 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 46.728 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Pilcher, F. (2013) Minor Planet Bull. 40, 85-87.]
[Marciniak, A.; Pilcher, F.; Oszkiewicz, D.; Santana-Ros, T.; et al. (2015) Planet. Space Sci. 118, 256-266.]
geometric albedo albedo 0.065   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

538 Friederike (A904 OA)          Discovered 1904-Jul-18 by Gotz, P. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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