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3998 Tezuka (1989 AB)
Classification: Main-belt Asteroid          SPK-ID: 2003998
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 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1965039188103029 1.4474e-08  
a 2.278892614006828 5.0498e-09 au
q 1.831081284806632 3.3513e-08 au
i 6.489602539747509 1.3696e-06 deg
node 5.501650879963774 7.1298e-06 deg
peri 76.0079492026656 1.1986e-05 deg
M 113.6946544395296 5.3277e-06 deg
tp 2458803.654222798308
(2019-Nov-16.15422280)
1.8338e-05 TDB
period 1256.562856863196
3.44
4.1766e-06
1.143e-08
d
yr
n .2864958151784633 9.5227e-10 deg/d
Q 2.726703943207025 6.0421e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2419  
   data-arc span      28257 days (77.36 yr)  
   first obs. used      1943-10-05  
   last obs. used      2021-02-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40751  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 15:49:02  

Additional Information
 Earth MOID = .859078 au 
 Jupiter MOID = 2.54001 au 
 T_jup = 3.573 
[ 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 12.97   n/a E2021B10  
diameter diameter 6.859 km 0.130 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 3.0789 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[LeCrone, C.; Duncan, A.; Hudson, E.; Johnson, J.; et al. (2006) Minor Planet Bull. 33, 66-67.]
[Omae, Y.; Ebisu, D.; Kawano, M.; Kanda, T.; et al. (2016) Minor Planet Bull. 43, 272-274.]
[Franco, L.; Marchini, A.; Saya, L.-F.; Galli, G.; et al. (2020) Minor Planet Bull. 47, 242-246.]
geometric albedo albedo 0.260   0.055 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

3998 Tezuka (1989 AB)          Discovered 1989-Jan-01 by Kojima, T. at Chiyoda
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1989 AB = 1943 TJ = 1950 WD = 1974 SW4 = 1976 JU7 = 1981 UF20 = 1984 SR4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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