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1555 Dejan (1941 SA)
Classification: Main-belt Asteroid          SPK-ID: 2001555
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2761402773454976 3.236e-08  
a 2.691081583639694 7.9265e-09 au
q 1.947965568774068 8.8029e-08 au
i 6.020622434347088 3.5395e-06 deg
node 318.0378456316915 3.3609e-05 deg
peri 47.5962152824167 3.4045e-05 deg
M 295.620208097121 7.0534e-06 deg
tp 2459288.860513959521
(2021-Mar-15.36051396)
3.2355e-05 TDB
period 1612.459157712584
4.41
7.1242e-06
1.95e-08
d
yr
n .2232614688428399 9.8642e-10 deg/d
Q 3.434197598505319 1.0115e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2705  
   data-arc span      32223 days (88.22 yr)  
   first obs. used      1932-08-01  
   last obs. used      2020-10-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41982  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:17:50  

Additional Information
 Earth MOID = .951907 au 
 Jupiter MOID = 2.06684 au 
 T_jup = 3.308 
[ 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 11.6   n/a MPO435711  
diameter diameter 23.199 km 0.314 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 16.960 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:
[Brines, P.; Lozano, J.; Rodrigo, O.; Fornas, A.; et al. (2017) Minor Planet Bull. 44, 145-149.]
geometric albedo albedo 0.053   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

1555 Dejan (1941 SA)          Discovered 1941-Sep-15 by Rigaux, F. at Uccle
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1941 SA = 1932 PC = 1934 CD1 = 1954 NJ 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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