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18607 (1998 BT33)
Classification: Main-belt Asteroid          SPK-ID: 2018607
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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1560733647688607 2.0606e-08  
a 2.334976577334463 7.8106e-09 au
q 1.970548926253395 4.849e-08 au
i 6.074167418785057 1.9761e-07 deg
node 81.60642565549423 4.9983e-06 deg
peri 309.8159715817687 8.2997e-06 deg
M 247.0315116987099 6.4113e-06 deg
tp 2459609.456425295850
(2022-Jan-29.95642530)
2.4591e-05 TDB
period 1303.233453154252
3.57
6.5391e-06
1.79e-08
d
yr
n .2762360029422833 1.386e-09 deg/d
Q 2.69940422841553 9.0297e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1802  
   data-arc span      8200 days (22.45 yr)  
   first obs. used      1998-01-31  
   last obs. used      2020-07-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50166  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:33:14  

Additional Information
 Earth MOID = .982134 au 
 Jupiter MOID = 2.73271 au 
 T_jup = 3.544 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456917.5 (2014-Sep-17.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1549482102995968 2.0494e-08  
q 1.973369352586845 4.812e-08 au
tp 2457002.518804889158
(2014-Dec-11.01880489)
1.8585e-05 TDB
node 81.69212625365425 5.0004e-06 deg
peri 309.6643864889107 8.3666e-06 deg
i 6.073593177459121 1.9759e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      1802  
   data-arc span      8200 days (22.45 yr)  
   first obs. used      1998-01-31  
   last obs. used      2020-07-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50166  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:33:14  

Additional Information
 Jupiter MOID = 2.73271 au 
 T_jup = 3.544 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.199907433483146E-16 -9.766429605502126E-16 -3.22352605073565E-13 2.732920704633615E-14 -1.302736172958781E-13 -3.004028765232217E-15
q -9.766429605502126E-16 2.315570632567467E-15 7.766278260529139E-13 -6.454669121130549E-14 3.130855366433033E-13 7.158700066882417E-15
tp -3.22352605073565E-13 7.766278260529139E-13 3.454084572023721E-10 -1.05848324037027E-11 1.224412315699603E-10 2.575392761334919E-12
node 2.732920704633615E-14 -6.454669121130549E-14 -1.05848324037027E-11 2.500355710561594E-11 -2.921573121434302E-11 -4.014185200781815E-13
peri -1.302736172958781E-13 3.130855366433033E-13 1.224412315699603E-10 -2.921573121434302E-11 6.999928393888612E-11 1.236955797150646E-12
i -3.004028765232217E-15 7.158700066882417E-15 2.575392761334919E-12 -4.014185200781815E-13 1.236955797150646E-12 3.904334537877041E-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 14.23   n/a E2021B10  
diameter diameter 5.117 km 0.353 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 20.761 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.155   0.032 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18607 (1998 BT33)          Discovered 1998-Jan-31 by Kobayashi, T. at Oizumi
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 BT33 = 1978 NK6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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