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4844 Matsuyama (1991 BA2)
Classification: Main-belt Asteroid          SPK-ID: 2004844
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 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2185472424846626 2.2864e-08  
a 2.555376718259589 8.0319e-09 au
q 1.996906182974449 5.9657e-08 au
i 5.955770901882603 3.2452e-07 deg
node 248.1603478494873 5.5614e-06 deg
peri 355.559879628637 7.7512e-06 deg
M 48.49997728637522 2.9759e-06 deg
tp 2458999.488982556067
(2020-May-29.98898256)
1.2077e-05 TDB
period 1492.041240607849
4.08
7.0346e-06
1.926e-08
d
yr
n .2412801940067943 1.1376e-09 deg/d
Q 3.113847253544728 9.7873e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2835  
   data-arc span      23897 days (65.43 yr)  
   first obs. used      1955-06-23  
   last obs. used      2020-11-25  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43984  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 16:50:55  

Additional Information
 Earth MOID = .982403 au 
 Jupiter MOID = 1.91543 au 
 T_jup = 3.397 
[ 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 12.55   n/a E2021B10  
diameter diameter 7.578 km 0.263 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 2.7232 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Behrend, R. (2004) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.337   0.045 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
SMASSII spectral type spec_B S   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)

4844 Matsuyama (1991 BA2)          Discovered 1991-Jan-23 by Ueda and Kaneda at Kushiro
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1991 BA2 = 1955 MQ = 1963 MA = 1980 TF6 = 1983 FB = 1985 YV1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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