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JPL Small-Body Database Browser
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2249 Yamamoto (1942 GA)
Classification: Main-belt Asteroid          SPK-ID: 2002249
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08077193391124507 3.209e-08  
a 3.191993640565212 1.6054e-08 au
q 2.934170141184364 1.0221e-07 au
i 4.104369420732061 4.0319e-06 deg
node 147.8888558027762 5.3525e-05 deg
peri 112.5956019985226 5.9751e-05 deg
M 217.5800374781897 2.7659e-05 deg
tp 2459824.561869894368
(2022-Sep-02.06186989)
0.00016166 TDB
period 2083.010470646216
5.70
1.5715e-05
4.303e-08
d
yr
n .1728267836734957 1.3039e-09 deg/d
Q 3.44981713994606 1.7351e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2870  
   data-arc span      28398 days (77.75 yr)  
   first obs. used      1942-04-06  
   last obs. used      2020-01-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46608  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 18:28:24  

Additional Information
 Earth MOID = 1.92204 au 
 Jupiter MOID = 1.6077 au 
 T_jup = 3.187 
[ 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 11.2   n/a MPO452192  
diameter diameter 33.606 km 0.449 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 31.590 h n/a LCDB (Rev. 2019-August); 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 0.062   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

2249 Yamamoto (1942 GA)          Discovered 1942-Apr-06 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1942 GA = 1932 PK = 1949 OX = 1968 WA = 1971 HY = 1972 RM = 1976 GX5 = 1978 RJ5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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