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2902 Westerlund (1980 FN3)
Classification: Main-belt Asteroid          SPK-ID: 2002902
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1985674411684208 1.6537e-08  
a 2.20305881899568 5.4005e-09 au
q 1.765603066564184 3.7023e-08 au
i 4.377855776293895 2.7462e-07 deg
node 178.3909040298457 1.8957e-05 deg
peri 158.7892252961308 2.1079e-05 deg
M 13.53781422818011 6.3802e-06 deg
tp 2459155.585805539018
(2020-Nov-02.08580554)
2.1116e-05 TDB
period 1194.366367673748
3.27
4.3918e-06
1.202e-08
d
yr
n .3014150513139175 1.1083e-09 deg/d
Q 2.640514571427175 6.4729e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2918  
   data-arc span      19105 days (52.31 yr)  
   first obs. used      1968-10-23  
   last obs. used      2021-02-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45725  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 14:26:47  

Additional Information
 Earth MOID = .755475 au 
 Jupiter MOID = 2.74773 au 
 T_jup = 3.634 
[ 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 14.05   n/a E2021B10  
diameter diameter 4.120 km 0.099 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 30. h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Owings, L.E. (2018) Minor Planet Bull. 45, 227-231.]
geometric albedo albedo 0.247   0.041 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
SMASSII spectral type spec_B Sq   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)

2902 Westerlund (1980 FN3)          Discovered 1980-Mar-16 by Lagerkvist, C.-I. at La Silla
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1980 FN3 = 1968 UF2 = 1981 SB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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