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18455 (1995 DF)
Classification: Main-belt Asteroid          SPK-ID: 2018455
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1472066495508621 4.5161e-08  
a 2.234963067374902 8.3224e-09 au
q 1.905961642356725 1.0468e-07 au
i 4.510679601529676 3.2807e-06 deg
node 116.9162529106466 4.9265e-05 deg
peri 56.10876625430235 5.0614e-05 deg
M 250.3498677987421 1.3203e-05 deg
tp 2459572.215449553209
(2021-Dec-23.71544955)
4.5997e-05 TDB
period 1220.404929321371
3.34
6.8167e-06
1.866e-08
d
yr
n .2949840592664476 1.6477e-09 deg/d
Q 2.563964492393079 9.5475e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1107  
   data-arc span      15147 days (41.47 yr)  
   first obs. used      1979-07-24  
   last obs. used      2021-01-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49831  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:38:19  

Additional Information
 Earth MOID = .915498 au 
 Jupiter MOID = 2.40452 au 
 T_jup = 3.621 
[ 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 15.4   n/a MPO337414  
diameter diameter 2.588 km 0.298 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.219   0.065 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

18455 (1995 DF)          Discovered 1995-Feb-20 by Kobayashi, T. at Oizumi
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1995 DF = 1979 OC3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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