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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 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1940894780757384 2.4906e-08  
a 2.28743191279226 5.1362e-09 au
q 1.843465446704623 5.7851e-08 au
i 3.933389979119795 3.1209e-06 deg
node 164.3646695640751 4.1018e-05 deg
peri 51.0827146186646 4.1778e-05 deg
M 332.2103689343358 8.4532e-06 deg
tp 2459098.044092124650
(2020-Sep-05.54409212)
2.9773e-05 TDB
period 1263.63221886245
3.46
4.256e-06
1.165e-08
d
yr
n .2848930207905588 9.5955e-10 deg/d
Q 2.731398378879898 6.1331e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3013  
   data-arc span      27876 days (76.32 yr)  
   first obs. used      1944-02-21  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47312  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:51:46  

Additional Information
 Earth MOID = .840064 au 
 Jupiter MOID = 2.23836 au 
 T_jup = 3.573 
[ show covariance matrix ]

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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2017-Nov-16 04:13 < 00:01 Hebe 0.0389418031277248 0.0389408031917732 0.0389428030885459 8.85319445589838 8.85319443786648 2458073.675564652 0.125626597699579 79.9109707320485 30.8411663768792 57.9005881284403 164613.021110717 T 38 CATAB v2.0f-lin.ifort 2020-Jun-23 15:52:00 2020-Jun-23 15:52
2170-Jul-04 03:08 < 00:01 Amphi 0.0391687726933806 0.0391628378701432 0.0391747111716575 5.69180327654025 5.6918032507543 2513820.630722343 0.536129979986466 668.738962618293 30.3780513590299 -63.8509863015882 173142.4365718 T 38 CATAB v2.0f-lin.ifort 2020-Jun-23 15:52:00 2020-Jun-23 15:52

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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