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18760 (1999 HY7)
Classification: Main-belt Asteroid          SPK-ID: 2018760
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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1908340993271285 3.2707e-08  
a 2.404020655631098 1.0522e-08 au
q 1.945251539049924 7.7753e-08 au
i 2.292127838419642 4.3192e-06 deg
node 72.35615930951954 9.4925e-05 deg
peri 260.2534415926023 9.5819e-05 deg
M 198.7677119256313 1.5756e-05 deg
tp 2459810.254810934942
(2022-Aug-18.75481093)
6.1884e-05 TDB
period 1361.462611231621
3.73
8.9379e-06
2.447e-08
d
yr
n .2644215103889874 1.7359e-09 deg/d
Q 2.862789772212271 1.2529e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1452  
   data-arc span      10462 days (28.64 yr)  
   first obs. used      1992-07-23  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54077  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:37:23  

Additional Information
 Earth MOID = .934555 au 
 Jupiter MOID = 2.50001 au 
 T_jup = 3.498 
[ 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 14.59   n/a E2021B10  
diameter diameter 3.092 km 0.845 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.185   0.092 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18760 (1999 HY7)          Discovered 1999-Apr-19 by Spacewatch at Kitt Peak
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 HY7 = 1992 OR8 = 1996 TS38 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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