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3309 Brorfelde (1982 BH)
Classification: Inner Main-belt Asteroid          SPK-ID: 2003309
[ 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.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05342386699424385 4.1302e-08  
a 1.817419076007581 4.0841e-09 au
q 1.72032552101815 7.62e-08 au
i 21.13330265159905 5.659e-06 deg
node 29.78092539556334 9.0634e-06 deg
peri 218.3498923245649 4.8557e-05 deg
M 118.702891192845 4.8023e-05 deg
tp 2458705.419951356491
(2019-Aug-09.91995136)		 0.00011942 TDB
period 894.9134805746514
2.45		 3.0166e-06
8.259e-09		 d
yr
n .4022735245521533 1.356e-09 deg/d
Q 1.914512630997012 4.3023e-09 au
   Orbit Determination Parameters
   # obs. used (total)      2171  
   data-arc span      14170 days (38.80 yr)  
   first obs. used      1982-01-30  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .38824  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 02:11:27  

Additional Information
 Earth MOID = .728198 au 
 Jupiter MOID = 3.0731 au 
 T_jup = 3.964 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457055.5 (2015-Feb-02.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05336650191832987 4.1175e-08  
q 1.720627959939212 7.5971e-08 au
tp 2456916.046120351357
(2014-Sep-15.54612035)		 0.00012035 TDB
node 29.80431611718919 9.0636e-06 deg
peri 218.6315773125043 4.874e-05 deg
i 21.13307379771806 5.6588e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      2171  
   data-arc span      14170 days (38.80 yr)  
   first obs. used      1982-01-30  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .38824  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 02:11:27  

Additional Information
 Jupiter MOID = 3.0731 au 
 T_jup = 3.964 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.695406484044234E-15 -3.124357546600448E-15 -2.326922364279973E-12 5.213246160099762E-15 -8.983164879501571E-13 2.763778191910873E-16
q -3.124357546600448E-15 5.771580957562916E-15 4.183311667585497E-12 -9.632743278623044E-15 1.613172935812009E-12 -4.878523809261742E-16
tp -2.326922364279973E-12 4.183311667585497E-12 1.448439008504052E-8 -2.315680835020833E-11 5.767725350103852E-9 1.170650313568449E-12
node 5.213246160099762E-15 -9.632743278623044E-15 -2.315680835020833E-11 8.214879241596714E-11 -8.480561108794898E-11 -9.116216581751307E-12
peri -8.983164879501571E-13 1.613172935812009E-12 5.767725350103852E-9 -8.480561108794898E-11 2.375545627755906E-9 9.068635822281646E-12
i 2.763778191910873E-16 -4.878523809261742E-16 1.170650313568449E-12 -9.116216581751307E-12 9.068635822281646E-12 3.202199071924503E-11

[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.7   n/a MPO473811  
diameter diameter 5.038 km 0.083 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 2.5041 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Warner, B.D.; Pravec, P.; Kusnirak, P.; Cooney Jr.; et al. (2005) CBET 279.]
[Warner, B.D. (2009) Minor Planet Bull. 36, 108.]
[Warner, B.D.; Pravec, P.; Kusnirak, P.; Harris, A.W.; et al. (2011) Minor Planet Bull. 38, 107-109.]
[Pravec, P.; Scheirich, P.; Vokrouhlicky, D.; Harris, A.W.; et al. (2012) Icarus 218, 125-143. See also supplemental on-line material.]
[Warner, B.D. (2014) Minor Planet Bull. 41, 144-155.]
geometric albedo albedo 0.408   0.060 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
SMASSII spectral type spec_B S   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)

3309 Brorfelde (1982 BH)          Discovered 1982-Jan-28 by Jensen, K. and Augustesen, K. at Brorfelde
Reference: DISCOVERY.DBLast Updated: 2003-08-29
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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