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JPL Small-Body Database Browser
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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 48 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .170045947848591 3.8596e-08  
a 3.157828624341084 1.2584e-08 au
q 2.620852662771592 1.2475e-07 au
i 6.521811572733982 4.1513e-06 deg
node 141.1599616395411 3.5198e-05 deg
peri 227.50394849 3.6837e-05 deg
M 161.2530117585333 1.1651e-05 deg
tp 2458082.407168192604
(2017-Nov-24.90716819)
6.4554e-05 TDB
period 2049.65734187704
5.61
1.2252e-05
3.354e-08
d
yr
n .175639114228878 1.0499e-09 deg/d
Q 3.694804585910576 1.4724e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2881  
   data-arc span      42201 days (115.54 yr)  
   first obs. used      1904-07-20  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44205  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:30:02  

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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