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8942 Takagi (1997 BR2)
Classification: Main-belt Asteroid          SPK-ID: 2008942
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 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08275450482502306 3.7029e-08  
a 2.733885572266106 1.1461e-08 au
q 2.507644225484949 1.0255e-07 au
i 4.385552634483007 4.2278e-06 deg
node 152.3447946407176 4.0528e-05 deg
peri 225.5245070061797 4.5649e-05 deg
M 214.4563692074587 2.1994e-05 deg
tp 2459868.012849972372
(2022-Oct-15.51284997)
0.0001023 TDB
period 1651.083078534611
4.52
1.0382e-05
2.842e-08
d
yr
n .2180386951330829 1.3711e-09 deg/d
Q 2.960126919047263 1.2409e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1835  
   data-arc span      10612 days (29.05 yr)  
   first obs. used      1991-12-30  
   last obs. used      2021-01-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5179  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 21:00:56  

Additional Information
 Earth MOID = 1.50972 au 
 Jupiter MOID = 2.44092 au 
 T_jup = 3.344 
[ 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 14.19   n/a E2021B10  
diameter diameter 4.278 km 0.251 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 332.194 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.242   0.029 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

8942 Takagi           Discovered 1997 Jan. 30 by T. Kobayashi at Oizumi.
Japanese planetary scientist Yasuhiko Takagi (b. 1958) has investigated impact fragmentation phenomena and the origin of minor-planet families based on laboratory experiments. He also contributed to the Near-Infrared Spectrometer on board the Hayabusa spacecraft.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20031110/MPCPages.arcLast Updated: 2003-11-12

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Alternate Designations
 1997 BR2 = 1991 YH2 = 1993 FN38 = 1993 HH8 = 1995 VN3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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