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4090 Risehvezd (1986 RH1)
Classification: Main-belt Asteroid          SPK-ID: 2004090
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.

Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 45 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2090743250823407 2.5417e-08  
a 2.358330179797995 6.3678e-09 au
q 1.865263889135414 6.0043e-08 au
i 1.329104053391341 2.9656e-06 deg
node 266.5209301462683 0.00015189 deg
peri 4.412993080877278 0.00015218 deg
M 219.5806427973766 1.0961e-05 deg
tp 2459716.476378328494
4.1181e-05 TDB
period 1322.83397316953
n .2721429954943134 1.1022e-09 deg/d
Q 2.851396470460577 7.6991e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3041  
   data-arc span      32815 days (89.84 yr)  
   first obs. used      1931-03-20  
   last obs. used      2021-01-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44683  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 01:15:19  

Additional Information
 Earth MOID = .84726 au 
 Jupiter MOID = 2.25438 au 
 T_jup = 3.523 
[ 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 13.19   n/a E2021B10  
diameter diameter 7.195 km 0.299 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 4.55 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:
[Chang, C.K.; Ip, W.-H.; Lin, H.-W.; Cheng, Y.C.; et al. (2015) Astrophys. J. Supp. Ser. 219, A27.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.149   0.032 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

4090 Říšehvězd           Discovered 1986 Sept. 2 by A. Mrkos at Klet.
Named for Říše hvězd (the Realm of Stars), Czech popular journal for astronomy. Originally published by the Czech Astronomical Society in Prague, the journal has described new findings from astronomy, astrophysics and space exploration and provided information about Czech and Slovak amateur and professional astronomy for more than three-quarters of a century. Name suggested by J. Ticha, M. Tichy and Z. Moravec.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19960828/MPCPages.arcLast Updated: 2003-09-26

[ show close-approach data ]
Alternate Designations
 1986 RH1 = 1931 FF = 1971 KB = 1982 KX = 1988 AR3 = 1989 GU 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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