Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
15806 Kohei (1994 GN1)
Classification: Main-belt Asteroid          SPK-ID: 2015806
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1167564881505041 2.3437e-08  
a 3.017140723522652 1.4413e-08 au
q 2.664869968388276 6.8791e-08 au
i 10.33102384463959 8.7767e-07 deg
node 128.9748226831075 6.4943e-06 deg
peri 43.31019234271904 1.1459e-05 deg
M 66.20130396236438 7.4157e-06 deg
tp 2458848.489336356430
(2019-Dec-30.98933636)
3.8397e-05 TDB
period 1914.219680381646
5.24
1.3716e-05
3.755e-08
d
yr
n .1880661888964726 1.3476e-09 deg/d
Q 3.369411478657028 1.6096e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2326  
   data-arc span      13694 days (37.49 yr)  
   first obs. used      1983-02-15  
   last obs. used      2020-08-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45614  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 01:09:46  

Additional Information
 Earth MOID = 1.68234 au 
 Jupiter MOID = 1.65095 au 
 T_jup = 3.213 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456935.5 (2014-Oct-05.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1180593970835205 2.3469e-08  
q 2.660968686752425 6.893e-08 au
tp 2456930.714026638004
(2014-Sep-30.21402664)
3.5149e-05 TDB
node 128.9995188832644 6.4938e-06 deg
peri 42.74289454522393 1.1391e-05 deg
i 10.33159550793883 8.7784e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2326  
   data-arc span      13694 days (37.49 yr)  
   first obs. used      1983-02-15  
   last obs. used      2020-08-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45614  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 01:09:46  

Additional Information
 Jupiter MOID = 1.65095 au 
 T_jup = 3.213 
Orbit Covariance (6×6)
  e q tp node peri i
e 5.507959014467714E-16 -1.591219355048007E-15 1.182612266054597E-13 -1.301240148194553E-14 -6.578665708571502E-15 3.153259957589255E-15
q -1.591219355048007E-15 4.751313958102186E-15 -3.405126167491414E-13 4.432776877203977E-14 1.770570559509777E-14 -9.290972432387496E-15
tp 1.182612266054597E-13 -3.405126167491414E-13 1.235479289391308E-9 -9.781775251768729E-11 3.397492203967688E-10 4.196155538503337E-12
node -1.301240148194553E-14 4.432776877203977E-14 -9.781775251768729E-11 4.216917017709633E-11 -6.011748174109443E-11 -2.425776444684287E-12
peri -6.578665708571502E-15 1.770570559509777E-14 3.397492203967688E-10 -6.011748174109443E-11 1.297483287239699E-10 3.021585511142642E-12
i 3.153259957589255E-15 -9.290972432387496E-15 4.196155538503337E-12 -2.425776444684287E-12 3.021585511142642E-12 7.705946040921541E-13

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 12.77   n/a E2021B10  
diameter diameter 9.653 km 0.147 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 145.700 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 0.157   0.017 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

15806 Kohei           Discovered 1994 Apr. 15 by K. Endate and K. Watanabe at Kitami.
Kohei Mori (b. 1956) is an amateur astronomer and junior high school teacher. He has been a member of the Astronomical Society of Shikoku since 1983, and promotes the astronomical education in his local community.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2015-08-29Last Updated: 2015-09-02

[ show close-approach data ]
Alternate Designations
 1994 GN1 = 1983 CT2 = 1999 HT3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-May-12 05:30 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin