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1244 Deira (1932 KE)
Classification: Main-belt Asteroid          SPK-ID: 2001244
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0985404891305045 3.87e-08  
a 2.34313534311651 6.3498e-09 au
q 2.112241640306836 9.0082e-08 au
i 8.698931452179767 3.3064e-06 deg
node 277.0904588625401 2.8345e-05 deg
peri 261.0367698480725 3.3792e-05 deg
M 250.45381705754 2.0505e-05 deg
tp 2459399.147677121543
(2021-Jul-03.64767712)
7.5275e-05 TDB
period 1310.069962356761
3.59
5.3254e-06
1.458e-08
d
yr
n .2747944845268989 1.117e-09 deg/d
Q 2.574029045926183 6.9755e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2679  
   data-arc span      40846 days (111.83 yr)  
   first obs. used      1908-10-07  
   last obs. used      2020-08-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .38335  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:30:45  

Additional Information
 Earth MOID = 1.13717 au 
 Jupiter MOID = 2.4644 au 
 T_jup = 3.541 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.5   n/a MPO347525  
diameter diameter 31.799 km 0.487 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 210.6 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:
[Oey, J. (2011) http://minorplanet.haoeydental.com.au]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
geometric albedo albedo 0.036   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

1244 Deira (1932 KE)          Discovered 1932-May-25 by Jackson, C. at Johannesburg (UO)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1932 KE = 1930 YR = 1984 YQ6 = A908 TD = A921 GC = A924 BH 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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