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2802 Weisell (1939 BU)
Classification: Main-belt Asteroid          SPK-ID: 2002802
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 48 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1231068953941717 3.5894e-08  
a 3.113283211822008 1.5869e-08 au
q 2.730016581131805 1.1374e-07 au
i 9.613880020784473 3.6565e-06 deg
node 129.3373374855321 2.3568e-05 deg
peri 59.30401653942477 2.847e-05 deg
M 270.0716124329525 1.7912e-05 deg
tp 2459701.711096265768
(2022-May-02.21109627)
0.00010188 TDB
period 2006.440897443531
5.49
1.5341e-05
4.2e-08
d
yr
n .1794221800695387 1.3718e-09 deg/d
Q 3.496549842512211 1.7823e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2944  
   data-arc span      29955 days (82.01 yr)  
   first obs. used      1939-01-18  
   last obs. used      2021-01-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41169  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 01:05:44  

Additional Information
 Earth MOID = 1.74702 au 
 Jupiter MOID = 1.53485 au 
 T_jup = 3.185 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457003.5 (2014-Dec-12.0) TDB
Reference: JPL 48 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1239864870006387 3.5925e-08  
q 2.72488763277494 1.1373e-07 au
tp 2457702.020271199026
(2016-Nov-09.52027120)
9.3805e-05 TDB
node 129.4214389998025 2.3544e-05 deg
peri 60.35253599852122 2.8377e-05 deg
i 9.620695707419825 3.6595e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2944  
   data-arc span      29955 days (82.01 yr)  
   first obs. used      1939-01-18  
   last obs. used      2021-01-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41169  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 01:05:44  

Additional Information
 Jupiter MOID = 1.53485 au 
 T_jup = 3.185 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.290636811096185E-15 -4.055770869983264E-15 -2.032069886561113E-13 -1.612164973779453E-15 2.788703851955717E-15 3.330778062418039E-16
q -4.055770869983264E-15 1.293467805947798E-14 1.167147886700859E-12 5.963216075389998E-15 6.834177632978666E-14 -6.078226029945528E-16
tp -2.032069886561113E-13 1.167147886700859E-12 8.799441843636788E-9 6.321277027798621E-12 1.504881790901483E-9 1.916075792646942E-12
node -1.612164973779453E-15 5.963216075389998E-15 6.321277027798621E-12 5.543411575663776E-10 -5.451625134214467E-10 -4.187413623358179E-13
peri 2.788703851955717E-15 6.834177632978666E-14 1.504881790901483E-9 -5.451625134214467E-10 8.052582387882664E-10 7.082854498893996E-13
i 3.330778062418039E-16 -6.078226029945528E-16 1.916075792646942E-12 -4.187413623358179E-13 7.082854498893996E-13 1.339228987088467E-11

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 11.03   n/a E2021B10  
diameter diameter 18.813 km 0.371 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 14.683 h n/a LCDB (Rev. 2020-October); 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:
[Brinsfield, J.W. (2011) Minor Planet Bull. 38, 154-155.]
geometric albedo albedo 0.199   0.035 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

2802 Weisell (1939 BU)          Discovered 1939-Jan-19 by Vaisala, Y. at Turku
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1939 BU = 1945 GA = 1951 KZ = 1952 OT = 1962 JO = 1969 RQ = 1975 VB6 = 1977 AL = 1978 GM2 = 1983 CZ1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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