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4461 Sayama (1990 EL)
Classification: Main-belt Asteroid          SPK-ID: 2004461
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1309623134611957 3.1571e-08  
a 2.851948021242913 1.2037e-08 au
q 2.478450310509862 9.11e-08 au
i 16.03013569390063 8.1372e-07 deg
node 133.1703137514366 3.467e-06 deg
peri 150.3752249379181 1.3041e-05 deg
M 40.2877832761814 9.9251e-06 deg
tp 2459003.629018174403
(2020-Jun-03.12901817)
4.8515e-05 TDB
period 1759.182255607405
4.82
1.1138e-05
3.049e-08
d
yr
n .2046405361653107 1.2956e-09 deg/d
Q 3.225445731975964 1.3614e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2526  
   data-arc span      28778 days (78.79 yr)  
   first obs. used      1942-03-15  
   last obs. used      2020-12-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43251  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-16 16:31:52  

Additional Information
 Earth MOID = 1.47204 au 
 Jupiter MOID = 2.0532 au 
 T_jup = 3.235 
[ 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 11.48   n/a E2021B10  
diameter diameter 17.233 km 0.157 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 40.73 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Behrend, R. (2010) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Warner, B.D. (2010) Minor Planet Bull. 37, 161-165.]
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
[Behrend, R. (2019) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.136   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
SMASSII spectral type spec_B X   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

4461 Sayama (1990 EL)          Discovered 1990-Mar-05 by Sugie, A. at Dynic
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1990 EL = 1932 EJ = 1942 FA = 1943 OJ = 1975 BN = 1977 QC3 = 1980 EL = 1987 VP = 1988 VG7 = 1988 XC3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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