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33128 (1998 BU48)
Classification: TransNeptunian Object          SPK-ID: 2033128
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3823597575009223 5.8297e-06  
a 33.1629496122807 0.0013171 au
q 20.48277224051374 0.00067556 au
i 14.27724693682302 4.6049e-05 deg
node 132.8881390094726 0.00012983 deg
peri 281.8685964873955 0.0040097 deg
M 80.77286049541537 0.005641 deg
tp 2443349.535153924389
(1977-Jul-25.03515392)
0.16471 TDB
period 69755.45139827036
190.98
4.1557
0.01138
d
yr
n .005160886967020995 3.0746e-07 deg/d
Q 45.84312698404765 0.0018208 au
  Orbit Determination Parameters
   # obs. used (total)      155  
   data-arc span      7743 days (21.20 yr)  
   first obs. used      1998-01-22  
   last obs. used      2019-04-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      2  
   norm. resid. RMS      .4735  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 02:59:45  

Additional Information
 Earth MOID = 19.5252 au 
 Jupiter MOID = 15.6318 au 
 T_jup = 4.678 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456579.5 (2013-Oct-14.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3848325060475722 6.1997e-06  
q 20.55667512989267 0.00067012 au
tp 2443455.726257828373
(1977-Nov-08.22625783)
0.16792 TDB
node 132.7064132349429 0.00013035 deg
peri 282.9475181423329 0.0039903 deg
i 14.22791828270015 4.5845e-05 deg
  Orbit Determination Parameters
   # obs. used (total)      155  
   data-arc span      7743 days (21.20 yr)  
   first obs. used      1998-01-22  
   last obs. used      2019-04-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      2  
   norm. resid. RMS      .4735  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 02:59:45  

Additional Information
 Jupiter MOID = 15.6318 au 
 T_jup = 4.678 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.843577640689187E-11 2.832725655696172E-9 9.484738572340924E-7 7.025950837546048E-12 1.892288702413858E-8 9.103343792897361E-12
q 2.832725655696172E-9 4.490657002202544E-7 .0001033554275336085 3.412194935079147E-10 2.652712893043886E-6 9.74883028944882E-10
tp 9.484738572340924E-7 .0001033554275336085 .02819848126052639 1.493393158705159E-7 .0006427585642759966 2.665249877142966E-7
node 7.025950837546048E-12 3.412194935079147E-10 1.493393158705159E-7 1.699207528163039E-8 -1.393238799886481E-8 5.706218594566479E-9
peri 1.892288702413858E-8 2.652712893043886E-6 .0006427585642759966 -1.393238799886481E-8 1.592231592476174E-5 5.413742112661676E-10
i 9.103343792897361E-12 9.74883028944882E-10 2.665249877142966E-7 5.706218594566479E-9 5.413742112661676E-10 2.101761563703779E-9

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 6.7   n/a MPO468138  
rotation period rot_per 12.6 h n/a LCDB (Rev. 2019-August); 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:
[Sheppard, S.S.; Jewitt, D.C. (2002) Astron. J. 124, 1757-1775; Proc. ACM 2002, ESA SP 500, 21-24 (2002ESASP.500...21S); Sheppard, S.S. (2001) IAUC 7619 (2001IAUC.7619....3S).]

33128 (1998 BU48)          Discovered 1998-Jan-22 by Danzl, N. at Steward
Reference: 20020128/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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