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1580 Betulia (1950 KA)
Classification: Amor [NEO]          SPK-ID: 2001580
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 262 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4872286286895457 2.2234e-08  
a 2.197340691788654 2.7735e-10 au
q 1.12673339976473 4.8911e-08 au
i 52.08396725661309 9.3198e-06 deg
node 62.2983378310743 2.4855e-06 deg
peri 159.513428466402 6.6634e-06 deg
M 255.594737135041 1.9633e-06 deg
tp 2459545.536003469787
(2021-Nov-27.03600347)
6.5023e-06 TDB
period 1189.719347862607
3.26
2.2525e-07
6.167e-10
d
yr
n .3025923724336825 5.729e-11 deg/d
Q 3.267947983812578 4.1248e-10 au
  Orbit Determination Parameters
   # obs. used (total)      1353  
   # delay obs. used      5  
   # Doppler obs. used      6  
   data-arc span      25873 days (70.84 yr)  
   first obs. used      1950-05-22  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51674  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 12:38:46  

Additional Information
 Earth MOID = .135115 au 
 Jupiter MOID = 1.86117 au 
 T_jup = 3.065 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456848.5 (2014-Jul-10.0) TDB
Reference: JPL 262 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4874548884111092 2.2229e-08  
q 1.126013077703313 4.8895e-08 au
tp 2457166.235164268698
(2015-May-23.73516427)
6.3981e-06 TDB
node 62.31411890584181 2.4864e-06 deg
peri 159.465851407158 6.6583e-06 deg
i 52.08919294551276 9.319e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1353  
   # delay obs. used      5  
   # Doppler obs. used      6  
   data-arc span      25873 days (70.84 yr)  
   first obs. used      1950-05-22  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51674  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 12:38:46  

Additional Information
 Jupiter MOID = 1.86117 au 
 T_jup = 3.065 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.941215349199957E-16 -1.086886054726803E-15 6.199939061148399E-14 -5.034012640513059E-14 4.048792862112327E-14 3.573032635511667E-14
q -1.086886054726803E-15 2.390767152294644E-15 -1.359890649166849E-13 1.10686551737982E-13 -8.871402888743497E-14 -7.888548074274026E-14
tp 6.199939061148399E-14 -1.359890649166849E-13 4.093588210558435E-11 -1.072733227820216E-11 4.132649522977532E-11 1.033851975703304E-11
node -5.034012640513059E-14 1.10686551737982E-13 -1.072733227820216E-11 6.182329084975998E-12 -9.612356571034157E-12 -1.794888938585126E-12
peri 4.048792862112327E-14 -8.871402888743497E-14 4.132649522977532E-11 -9.612356571034157E-12 4.433334834966312E-11 5.985694762209799E-12
i 3.573032635511667E-14 -7.888548074274026E-14 1.033851975703304E-11 -1.794888938585126E-12 5.985694762209799E-12 8.684467834158154E-11

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 14.7   n/a MPO435711  
magnitude slope G 0.00   n/a PDS3 (MPC 17262) Fit
diameter diameter 5.8 km n/a Hazards due to Comets and Asteroids (1994), Ed. T. Gehrels, pp.540-543  
rotation period rot_per 6.1324 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Austin, R.R.D. (1976) Southern Stars 26, 228-230.]
[Tedesco, E.F.; Drummond, J.; Candy, M.; Birch, P.; et al. (1978) Icarus 35, 344-359.]
[Drummond, J.D.; Wisniewski, W.Z. (1990) Icarus 83, 349-359.]
[Wisniewski, W.Z.; Michalowski, T.M.; Harris, A.W.; McMillan, R.S. (1997) Icarus 126, 395-449; 1995, Lunar & Planetary Sci. XXVI, 1511-1512.]
[Kaasalainen, M.; et al. (2004) Icarus 167, 178-196.]
[Magri, C.; Ostro, S.J.; Scheeres, D.J.; Nolan, M.C.; et al. (2007) Icarus 196, 152-177.]
[Warner, B.D. (2015) Minor Planet Bull. 42, 256-266.]
geometric albedo albedo 0.08   n/a Hazards due to Comets and Asteroids (1994), Ed. T. Gehrels, pp.540-543  
B-V BV 0.656   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=14; phase (min.=8.86, mean=18.58, max.=39.44) deg.
U-B UB 0.249   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=7; phase (min.=8.86, mean=15.33, max.=39.44) deg.
Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices

1580 Betulia (1950 KA)          Discovered 1950-May-22 by Johnson, E. L. at Johannesburg (UO)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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