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21376 (1998 BP8)
Classification: Main-belt Asteroid          SPK-ID: 2021376
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1643715512526477 1.7581e-08  
a 2.241104755290655 6.1519e-09 au
q 1.872730890143844 3.9768e-08 au
i 5.148379704036985 1.0508e-06 deg
node 1.891729458073024 4.0822e-06 deg
peri 301.6558145812716 7.3394e-06 deg
M 143.8103723344443 5.9399e-06 deg
tp 2458710.969931780850
(2019-Aug-15.46993178)
1.9884e-05 TDB
period 1225.438900533914
3.36
5.0458e-06
1.381e-08
d
yr
n .2937722964752881 1.2096e-09 deg/d
Q 2.609478620437465 7.1631e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1955  
   data-arc span      15144 days (41.46 yr)  
   first obs. used      1979-09-23  
   last obs. used      2021-03-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47986  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:44:17  

Additional Information
 Earth MOID = .862012 au 
 Jupiter MOID = 2.62877 au 
 T_jup = 3.611 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.4   n/a MPO250423  
rotation period rot_per 5.71196 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]

21376 (1998 BP8)          Discovered 1998-Jan-25 by Kobayashi, T. at Oizumi
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 BP8 = 1979 SD5 = 1999 RD52 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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