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14827 Hypnos (1986 JK)
Classification: Apollo [NEO, PHA]          SPK-ID: 2014827
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbit Diagram
Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet was implemented using 2-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet has stopped working because of a recent Java upgrade, here is a possible workaround.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).


Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 48 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6656337851109047 3.7723e-08  
a 2.842312421662539 6.9813e-08 AU
q .9503732459635614 9.3315e-08 AU
i 1.980776591718274 1.6261e-05 deg
node 57.97824365529511 0.00020307 deg
peri 238.1274469675273 0.0002077 deg
M .9166727462717069 5.5487e-05 deg
tp 2456996.043253160757
(2014-Dec-04.54325316)
0.00026961 JED
period 1750.274423072922
4.79
6.4486e-05
1.766e-07
d
yr
n .2056820320598385 7.578e-09 deg/d
Q 4.734251597361516 1.1628e-07 AU
  Orbit Determination Parameters
   # obs. used (total)      180  
   # delay obs. used      0  
   # Doppler obs. used      10  
   data-arc span      5288 days (14.48 yr)  
   first obs. used      1986-05-04  
   last obs. used      2000-10-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .61447  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Sep-08 06:15:44  

Additional Information
 Earth MOID = .0150366 AU 
 T_jup = 2.933 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 18.3 mag n/a PDS3 (MPO 12)  
diameter diameter 0.9 km n/a Hazards due to Comets and Asteroids (1994), Ed. T. Gehrels, pp.540-543 based on assumed dark albedo (0.06)
B-V BV .684 mag .020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=1; phase=4.74 deg.
U-B UB .492 mag .039 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=1; phase=4.74 deg.

14827 Hypnos           Discovered 1986 May 5 by C. S. Shoemaker and E. M. Shoemaker at Palomar.
Hypnos was the Greek god of sleep and twin brother of death. He entered the sleep of mortals and gave them, at the bidding of the Olympians, dreams of foolishness or inspiration, depending on the individual and their divine protectors or enemies.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030106/MPCPages.arcLast Updated: 2003-10-02

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Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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