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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09872210178366538 3.8799e-08  
a 2.34272832338951 6.972e-09 au
q 2.111449259396375 9.0358e-08 au
i 8.69887080195533 4.1233e-06 deg
node 277.0907598795035 2.8604e-05 deg
peri 261.1448658992342 3.572e-05 deg
M 140.3967038896503 2.2e-05 deg
tp 2458089.717828297130
(2017-Dec-02.21782830)
7.9702e-05 TDB
period 1309.7286240962
3.59
5.8467e-06
1.601e-08
d
yr
n .2748661007912414 1.227e-09 deg/d
Q 2.574007387382645 7.6603e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2230  
   data-arc span      40496 days (110.87 yr)  
   first obs. used      1908-10-07  
   last obs. used      2019-08-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41184  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-23 19:16:13  

Additional Information
 Earth MOID = 1.13678 au 
 Jupiter MOID = 2.46572 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-January); 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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