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4293 Masumi (1989 VT)
Classification: Main-belt Asteroid          SPK-ID: 2004293
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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2237572559398264 3.4268e-08  
a 2.720481573326157 1.0431e-08 au
q 2.111754081643834 9.7255e-08 au
i 9.371321365401682 3.7201e-06 deg
node 58.03789156793777 2.4542e-05 deg
peri 53.24988183957176 2.6369e-05 deg
M 302.5339932792958 1.1131e-05 deg
tp 2459462.122823504032
(2021-Sep-04.62282350)
5.1422e-05 TDB
period 1638.95530307517
4.49
9.4263e-06
2.581e-08
d
yr
n .2196521157865211 1.2633e-09 deg/d
Q 3.329209065008479 1.2765e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2346  
   data-arc span      25925 days (70.98 yr)  
   first obs. used      1950-03-14  
   last obs. used      2021-03-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40349  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 16:10:21  

Additional Information
 Earth MOID = 1.14331 au 
 Jupiter MOID = 1.88738 au 
 T_jup = 3.303 
[ 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 12.19   n/a E2021B10  
diameter diameter 15.795 km 0.286 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 36. h n/a LCDB (Rev. 2020-October); 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:
[Behrend, R. (2017) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.112   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

4293 Masumi (1989 VT)          Discovered 1989-Nov-01 by Oshima, Y. at Gekko
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1989 VT = 1941 FC = 1950 EV = 1957 SE = 1962 WQ = 1971 UF3 = 1977 FR1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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