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4672 Takuboku (1988 HB)
Classification: Main-belt Asteroid          SPK-ID: 2004672
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 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0482249228802426 2.4097e-08  
a 3.189010695048866 1.6645e-08 au
q 3.035220900215866 8.2443e-08 au
i 15.52800364975465 3.7889e-07 deg
node 91.65527058874508 3.5284e-06 deg
peri 176.687604581495 2.2358e-05 deg
M 217.7635704123743 2.4846e-05 deg
tp 2460022.346541411340
(2023-Mar-18.84654141)
0.00014473 TDB
period 2080.091266111351
5.69
1.6286e-05
4.459e-08
d
yr
n .173069329151603 1.355e-09 deg/d
Q 3.342800489881866 1.7448e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3713  
   data-arc span      18225 days (49.90 yr)  
   first obs. used      1971-04-27  
   last obs. used      2021-03-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .32533  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 21:46:42  

Additional Information
 Earth MOID = 2.01738 au 
 Jupiter MOID = 1.7629 au 
 T_jup = 3.138 
[ 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 11.53   n/a MPCxxxxx  
diameter diameter 28.115 km 0.258 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 4.37653 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:
[McNeill, A.; Mommert, M.; Trilling, D.E.; Llama, J.; Skiff, B. (2019) Ap. J. Suppl. Series 245, id.29.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.108   0.018 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

4672 Takuboku (1988 HB)          Discovered 1988-Apr-17 by Ueda and Kaneda at Kushiro
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1988 HB = 1971 HT = 1979 WS7 = 1981 AN3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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