Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
100715 (1998 BK21)
Classification: Main-belt Asteroid          SPK-ID: 2100715
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0985264245147647 4.7505e-08  
a 2.807190953581622 1.6966e-08 au
q 2.530608465995032 1.3786e-07 au
i .4140558815472087 5.3089e-06 deg
node 15.20017069278499 0.00064276 deg
peri 358.874595114398 0.0006432 deg
M 4.533661724155 2.5058e-05 deg
tp 2458978.865195653666
(2020-May-09.36519565)
0.00011952 TDB
period 1717.933546559871
4.70
1.5574e-05
4.264e-08
d
yr
n .2095540894005435 1.8997e-09 deg/d
Q 3.083773441168213 1.8638e-08 au
  Orbit Determination Parameters
   # obs. used (total)      455  
   data-arc span      7946 days (21.75 yr)  
   first obs. used      1998-01-22  
   last obs. used      2019-10-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57293  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 11:55:36  

Additional Information
 Earth MOID = 1.53116 au 
 Jupiter MOID = 2.38063 au 
 T_jup = 3.315 
[ 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 15.9   n/a MPO417508  
diameter diameter 3.988 km 0.254 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.040   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

100715 (1998 BK21)          Discovered 1998-Jan-22 by Spacewatch at Kitt Peak
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 1998 BK21 = 2001 UU114 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Apr-03 18:39 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin