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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 231 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4873502364761739 2.2741e-08  
a 2.197150031438465 2.7446e-10 au
q 1.126368444043296 5.0021e-08 au
i 52.09207037962277 9.5166e-06 deg
node 62.29781712181257 2.5227e-06 deg
peri 159.5179483080446 7.2733e-06 deg
M 195.0724539815504 2.1045e-06 deg
tp 2459545.477652079356
(2021-Nov-26.97765208)
6.9886e-06 TDB
period 1189.564505656448
3.26
2.2289e-07
6.102e-10
d
yr
n .3026317600165265 5.6705e-11 deg/d
Q 3.267931618833634 4.0821e-10 au
  Orbit Determination Parameters
   # obs. used (total)      1220  
   # delay obs. used      5  
   # Doppler obs. used      6  
   data-arc span      25404 days (69.55 yr)  
   first obs. used      1950-05-22  
   last obs. used      2019-12-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51862  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-11 04:52:05  

Additional Information
 Earth MOID = .136136 au 
 Jupiter MOID = 1.86223 au 
 T_jup = 3.065 
[ 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 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. 2019-August); 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

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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