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JPL Small-Body Database Browser
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4548 Wielen (2538 P-L)
Classification: Main-belt Asteroid          SPK-ID: 2004548
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06362518660467038 3.6358e-08  
a 2.285439912175708 7.7557e-09 au
q 2.140028371289767 8.3756e-08 au
i 8.282136494530711 4.2635e-06 deg
node 26.21621196697517 2.3409e-05 deg
peri 201.2196014494117 4.1884e-05 deg
M 234.3324574330566 3.7353e-05 deg
tp 2459441.028245912159
(2021-Aug-14.52824591)
0.00013187 TDB
period 1261.981934944703
3.46
6.4239e-06
1.759e-08
d
yr
n .2852655731682674 1.4521e-09 deg/d
Q 2.430851453061649 8.2492e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1920  
   data-arc span      25332 days (69.36 yr)  
   first obs. used      1950-12-09  
   last obs. used      2020-04-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48779  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 02:09:23  

Additional Information
 Earth MOID = 1.13322 au 
 Jupiter MOID = 2.54212 au 
 T_jup = 3.586 
[ 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 13.9   n/a MPO431549  
diameter diameter 5.220 km 0.090 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.179   0.030 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
SMASSII spectral type spec_B Xc   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)

4548 Wielen (2538 P-L)          Discovered 1960-Sep-24 by van Houten and Gehrels at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 2538 P-L = 1981 UB15 = 1981 WU5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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