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
JPL Small-Body Database Browser
Search: [ help ]  
101591 (1999 BB21)
Classification: Main-belt Asteroid          SPK-ID: 2101591
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1407694776298029 3.6335e-08  
a 2.284290050359733 8.1518e-09 au
q 1.962731733215637 8.2012e-08 au
i 5.366102678640632 4.2208e-06 deg
node 295.6679626175618 4.3816e-05 deg
peri 127.223568522383 4.7949e-05 deg
M 161.9868420012999 1.867e-05 deg
tp 2458633.082746836260
(2019-May-29.58274684)
6.4411e-05 TDB
period 1261.029652873331
3.45
6.7502e-06
1.848e-08
d
yr
n .2854809949787609 1.5282e-09 deg/d
Q 2.605848367503829 9.2993e-09 au
  Orbit Determination Parameters
   # obs. used (total)      788  
   data-arc span      12960 days (35.48 yr)  
   first obs. used      1984-11-27  
   last obs. used      2020-05-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .56461  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:37:32  

Additional Information
 Earth MOID = .980967 au 
 Jupiter MOID = 2.68052 au 
 T_jup = 3.584 
[ 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 16.18   n/a E2021B55  
diameter diameter 2.348 km 0.484 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.140   0.048 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

101591 (1999 BB21)          Discovered 1999-Jan-16 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

Alternate Designations
 1999 BB21 = 1984 WS3 = 2001 QY324 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Apr-21 06:00 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin