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 ]  
6649 Yokotatakao (1991 RN)
Classification: Main-belt Asteroid          SPK-ID: 2006649
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2548581827947955 5.8163e-08  
a 2.533389282110908 6.812e-09 au
q 1.88773429336031 1.4924e-07 au
i 7.203148360292333 5.5709e-06 deg
node 325.2928527533707 2.2607e-05 deg
peri 349.0587270433447 2.3559e-05 deg
M 67.54086462317849 5.3793e-06 deg
tp 2458724.178017991028
(2019-Aug-28.67801799)
2.1682e-05 TDB
period 1472.825586083656
4.03
5.9404e-06
1.626e-08
d
yr
n .2444281274045928 9.8586e-10 deg/d
Q 3.179044270861506 8.5481e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2149  
   data-arc span      23731 days (64.97 yr)  
   first obs. used      1955-11-11  
   last obs. used      2020-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46911  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:34:11  

Additional Information
 Earth MOID = .874629 au 
 Jupiter MOID = 2.13052 au 
 T_jup = 3.393 
[ 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 13.1   n/a MPO347578  
diameter diameter 7.411 km 0.092 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 7.55878 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.222   0.042 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

6649 Yokotatakao           Discovered 1991 Sept. 5 by A. Natori and T. Urata at the JCPM Yakiimo Station.
Takao Yokota (b. 1956) is a systems engineer who works on space and astronomical technologies and also an active amateur astronomer. He contributed to the International Space Station project and is a staff member of the Japan Spaceguard Association.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020526/MPCPages.arcLast Updated: 2003-10-02

[ show close-approach data ]
Alternate Designations
 1991 RN = 1979 WP4 = 1983 SR = 1987 RB5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Nov-30 13:52 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin