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9869 Yadoumaru (1992 CD1)
Classification: Main-belt Asteroid          SPK-ID: 2009869
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 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .131365527801882 3.0949e-08  
a 2.362400073429426 6.5594e-09 au
q 2.052062140904165 7.2857e-08 au
i 2.91883806864052 3.6671e-06 deg
node 187.7224664642665 5.9878e-05 deg
peri 310.8175641909125 6.1291e-05 deg
M 349.6255153416071 1.3127e-05 deg
tp 2459238.720171377963
(2021-Jan-24.22017138)
4.839e-05 TDB
period 1326.25977570227
3.63
5.5237e-06
1.512e-08
d
yr
n .2714400350484699 1.1305e-09 deg/d
Q 2.672738005954687 7.4211e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2186  
   data-arc span      10577 days (28.96 yr)  
   first obs. used      1992-02-09  
   last obs. used      2021-01-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47664  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 01:51:20  

Additional Information
 Earth MOID = 1.06661 au 
 Jupiter MOID = 2.34967 au 
 T_jup = 3.537 
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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 13.98   n/a E2021B10  
diameter diameter 5.491 km 0.032 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 7.57860 h n/a LCDB (Rev. 2020-October); 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 0.213   0.024 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

9869 Yadoumaru           Discovered 1992 Feb. 9 by K. Endate and K. Watanabe at Kitami.
Yasushi Yadoumaru (b. 1965) is a research fellow at the Misato Observatory. His primary field of study is spectroscopic observations of planetary nebulae. His doctoral dissertation was on the evolution of planetary nebulae, focusing on their expansion velocities.
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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Alternate Designations
 1992 CD1 = 1952 DJ1 = 1996 HL15 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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