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2389 Dibaj (1977 QC1)
Classification: Main-belt Asteroid          SPK-ID: 2002389
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 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2342880688290253 4.2713e-08  
a 2.443524485182764 7.7824e-09 au
q 1.871035852412856 1.0414e-07 au
i 7.835250489173776 4.7427e-06 deg
node 333.7742702500417 2.2699e-05 deg
peri 337.6190136180236 2.3957e-05 deg
M 89.5137359363097 6.9437e-06 deg
tp 2458653.594925998472
(2019-Jun-19.09492600)
2.6964e-05 TDB
period 1395.158243975073
3.82
6.6652e-06
1.825e-08
d
yr
n .2580352455032565 1.2327e-09 deg/d
Q 3.016013117952672 9.6057e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2338  
   data-arc span      31098 days (85.14 yr)  
   first obs. used      1935-09-22  
   last obs. used      2020-11-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42601  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 02:06:03  

Additional Information
 Earth MOID = .859812 au 
 Jupiter MOID = 2.28763 au 
 T_jup = 3.449 
[ 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 12.9   n/a MPO502176  
diameter diameter 5.820 km 0.236 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 209.3 h n/a LCDB (Rev. 2020-October); 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:
[Polakis, T. (2020) Minor Planet Bull. 47, 94-101.]
geometric albedo albedo 0.434   0.104 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

2389 Dibaj (1977 QC1)          Discovered 1977-Aug-19 by Chernykh, N. at Nauchnyj
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1977 QC1 = 1935 SH = 1950 ND1 = 1958 UL = 1973 QW 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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