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18481 (1995 YH)
Classification: Main-belt Asteroid          SPK-ID: 2018481
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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1269494776754657 1.5286e-08  
a 2.984771413616917 1.2665e-08 au
q 2.605856241677588 4.4761e-08 au
i 8.832640235921057 3.9216e-07 deg
node 252.2804610450559 8.616e-06 deg
peri 91.7196123514677 1.626e-05 deg
M 32.81496232813524 1.0077e-05 deg
tp 2459028.814170512656
(2020-Jun-28.31417051)
5.2701e-05 TDB
period 1883.497472811397
5.16
1.1988e-05
3.282e-08
d
yr
n .1911337844603779 1.2165e-09 deg/d
Q 3.363686585556246 1.4273e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2270  
   data-arc span      9211 days (25.22 yr)  
   first obs. used      1995-12-17  
   last obs. used      2021-03-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43294  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:29:53  

Additional Information
 Earth MOID = 1.61576 au 
 Jupiter MOID = 2.08595 au 
 T_jup = 3.228 
[ 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 12.73   n/a E2021B10  
diameter diameter 11.152 km 0.468 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 7.323 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.166   0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

18481 (1995 YH)          Discovered 1995-Dec-17 by Kobayashi, T. at Oizumi
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1995 YH = 1998 KY14 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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