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1368 Numidia (1935 HD)
Classification: Main-belt Asteroid          SPK-ID: 2001368
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 47 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06242007037956263 1.0916e-08  
a 2.52358345782174 7.0422e-09 au
q 2.366061200775806 2.7298e-08 au
i 14.81986107054061 3.8955e-07 deg
node 18.06189877145163 4.7319e-06 deg
peri 263.407580680328 2.3228e-05 deg
M 81.97022200935932 2.0398e-05 deg
tp 2458867.090058494432
(2020-Jan-18.59005849)
8.3053e-05 TDB
period 1464.282711449773
4.01
6.1292e-06
1.678e-08
d
yr
n .2458541627139525 1.0291e-09 deg/d
Q 2.681105714867672 7.4817e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3112  
   data-arc span      32775 days (89.73 yr)  
   first obs. used      1931-05-20  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .38184  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 12:21:02  

Additional Information
 Earth MOID = 1.40346 au 
 Jupiter MOID = 2.41308 au 
 T_jup = 3.406 
[ 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 10.95   n/a E2021B10 IRAS observations used: 10
diameter diameter 19.591 km 0.213 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 3.64 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Binzel, R.P. (1987) Icarus 72, 135-208.]
[Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
geometric albedo albedo 0.298   0.021 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.860   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=7.87 deg.
U-B UB 0.360   0.030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=7.87 deg.

1368 Numidia (1935 HD)          Discovered 1935-Apr-30 by Jackson, C. at Johannesburg (UO)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1935 HD = 1928 SN = 1931 JF = 1935 KB = 1936 QN = 1953 YK 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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