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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 ]

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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 49 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1231069322767685 2.3428e-08  
a 3.113283204935577 1.3956e-08 au
q 2.730016460267172 7.617e-08 au
i 9.613886173313963 1.7689e-07 deg
node 129.3374035435103 1.7949e-06 deg
peri 59.30395204356026 4.7651e-06 deg
M 270.0716209708646 4.1168e-06 deg
tp 2459701.711047017186
(2022-May-02.21104702)
2.4309e-05 TDB
period 2006.440890786306
5.49
1.3491e-05
3.694e-08
d
yr
n .1794221806648484 1.2064e-09 deg/d
Q 3.496549949603982 1.5674e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3050  
   data-arc span      29996 days (82.12 yr)  
   first obs. used      1939-01-18  
   last obs. used      2021-03-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42172  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-16 14:25:19  

Additional Information
 Earth MOID = 1.74702 au 
 Jupiter MOID = 1.53485 au 
 T_jup = 3.185 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457050.5 (2015-Jan-28.0) TDB
Reference: JPL 49 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1240127036734637 2.3519e-08  
q 2.724803592443062 7.6547e-08 au
tp 2457701.962044891850
(2016-Nov-09.46204489)
2.2196e-05 TDB
node 129.4215032807545 1.7956e-06 deg
peri 60.34578888982325 4.6548e-06 deg
i 9.620700987257962 1.7696e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      3050  
   data-arc span      29996 days (82.12 yr)  
   first obs. used      1939-01-18  
   last obs. used      2021-03-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42172  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-16 14:25:19  

Additional Information
 Jupiter MOID = 1.53485 au 
 T_jup = 3.185 
Orbit Covariance (6×6)
  e q tp node peri i
e 5.53144682657556E-16 -1.777888524011679E-15 -2.347575464199449E-13 -1.143818121673927E-14 2.347403900192302E-14 5.6233622941466E-16
q -1.777888524011679E-15 5.859429135925325E-15 7.092408528056529E-13 3.472684611237946E-14 -8.856566815964209E-14 -1.65853916642997E-15
tp -2.347575464199449E-13 7.092408528056529E-13 4.926491396657616E-10 -1.303074029659645E-11 7.723548265920497E-11 1.11665622743429E-12
node -1.143818121673927E-14 3.472684611237946E-14 -1.303074029659645E-11 3.224293665761274E-12 -5.872337787323596E-12 -1.397085649570129E-13
peri 2.347403900192302E-14 -8.856566815964209E-14 7.723548265920497E-11 -5.872337787323596E-12 2.166710411076746E-11 3.841643344979162E-13
i 5.6233622941466E-16 -1.65853916642997E-15 1.11665622743429E-12 -1.397085649570129E-13 3.841643344979162E-13 3.131354884678898E-14

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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