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16875 (1998 BD4)
Classification: Main-belt Asteroid          SPK-ID: 2016875
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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1595790613905574 3.5465e-08  
a 2.600254624170582 1.405e-08 au
q 2.185308431868984 9.44e-08 au
i 12.2388409178826 5.8233e-06 deg
node 316.2080498336397 1.9633e-05 deg
peri 93.61593561069331 2.8675e-05 deg
M 227.4221376447949 2.0966e-05 deg
tp 2459764.515130208409
(2022-Jul-04.01513021)
9.1406e-05 TDB
period 1531.518484820821
4.19
1.2413e-05
3.398e-08
d
yr
n .2350608259502123 1.9051e-09 deg/d
Q 3.01520081647218 1.6292e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1327  
   data-arc span      11099 days (30.39 yr)  
   first obs. used      1990-03-02  
   last obs. used      2020-07-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50365  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 01:45:09  

Additional Information
 Earth MOID = 1.23537 au 
 Jupiter MOID = 2.4251 au 
 T_jup = 3.365 
[ 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 14.31   n/a E2021B10  
diameter diameter 3.634 km 0.200 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.323 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 0.336   0.059 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

16875 (1998 BD4)          Discovered 1998-Jan-20 by Shimizu, Y., Urata, T. at Nachi-Katsuura
Reference: 20000913/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 BD4 = 1990 EC2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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