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JPL Small-Body Database Browser
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2954 Delsemme (1982 BT1)
Classification: Main-belt Asteroid          SPK-ID: 2002954
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1940894776664822 2.5034e-08  
a 2.287431912689336 5.1758e-09 au
q 1.843465447557821 5.809e-08 au
i 3.933389915821028 3.1238e-06 deg
node 164.3646723478989 4.1591e-05 deg
peri 51.08271173928845 4.2336e-05 deg
M 332.2103691104043 8.5319e-06 deg
tp 2459098.044091500050
(2020-Sep-05.54409150)
3.0054e-05 TDB
period 1263.632218777163
3.46
4.2889e-06
1.174e-08
d
yr
n .2848930208097872 9.6695e-10 deg/d
Q 2.731398377820851 6.1804e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2902  
   data-arc span      27827 days (76.19 yr)  
   first obs. used      1944-02-21  
   last obs. used      2020-04-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47919  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:47:47  

Additional Information
 Earth MOID = .840064 au 
 Jupiter MOID = 2.23836 au 
 T_jup = 3.573 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456823.5 (2014-Jun-15.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1942207817022486 2.5007e-08  
q 1.843450819425341 5.8044e-08 au
tp 2456570.643538669616
(2013-Oct-05.14353867)
2.8466e-05 TDB
node 164.3823996851955 4.1585e-05 deg
peri 51.09274186138355 4.2331e-05 deg
i 3.933105758818185 3.1244e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2902  
   data-arc span      27827 days (76.19 yr)  
   first obs. used      1944-02-21  
   last obs. used      2020-04-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47919  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:47:47  

Additional Information
 Jupiter MOID = 2.23836 au 
 T_jup = 3.573 
Orbit Covariance (6×6)
  e q tp node peri i
e 6.253338546356678E-16 -1.447855494382396E-15 -3.971217240987614E-14 2.715829116410865E-15 -8.193334820297767E-15 -5.311063142613525E-16
q -1.447855494382396E-15 3.36909757997067E-15 9.551786663492981E-14 -6.174167583068366E-15 2.033987256260397E-14 1.277676506664644E-15
tp -3.971217240987614E-14 9.551786663492981E-14 8.103377911807701E-10 3.280515370310199E-12 2.322788295786999E-10 8.311582169523217E-14
node 2.715829116410865E-15 -6.174167583068366E-15 3.280515370310199E-12 1.729312543682374E-9 -1.724017611415422E-9 -1.107157284110327E-11
peri -8.193334820297767E-15 2.033987256260397E-14 2.322788295786999E-10 -1.724017611415422E-9 1.791949681924805E-9 1.108228990744799E-11
i -5.311063142613525E-16 1.277676506664644E-15 8.311582169523217E-14 -1.107157284110327E-11 1.108228990744799E-11 9.761676047185085E-12

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 13.4   n/a MPO416740  
diameter diameter 5.317 km 0.052 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 4.691 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Wisniewski, W.Z.; Michalowski, T.M.; Harris, A.W.; McMillan, R.S. (1997) Icarus 126, 395-449; 1995, Lunar & Planetary Sci. XXVI, 1511-1512.]
[Ferrero, A. (2010) Minor Planet Bull. 37, 145.]
[Szabo, R.; Pal, A.; Sarneczky, K.; Szabo, Gy.M.; et al. (2016) Astron. Astrophys. 596, A40.]
geometric albedo albedo 0.274   0.039 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

2954 Delsemme (1982 BT1)          Discovered 1982-Jan-30 by Bowell, E. at Flagstaff (AM)
Discovered at the Anderson Mesa station, which is operated by the Lowell Observatory.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1982 BT1 = 1944 DE = 1951 ER2 = 1976 QJ2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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