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 ]  
249161 (2008 BF21)
Classification: Main-belt Asteroid          SPK-ID: 2249161
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ hide orbit diagram ]

For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


[ revert to old Java-based viewer ]

Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1498723437315693 7.5015e-08  
a 3.026638293983865 4.8351e-08 au
q 2.573028919236784 2.3491e-07 au
i 13.29205092670675 9.3228e-06 deg
node 328.8602681868583 2.7517e-05 deg
peri 67.68193847776183 4.3372e-05 deg
M 222.5942379779065 3.2577e-05 deg
tp 2459734.577064135726
(2022-Jun-04.07706414)
0.00018266 TDB
period 1923.265365293556
5.27
4.6086e-05
1.262e-07
d
yr
n .1871816580781881 4.4853e-09 deg/d
Q 3.480247668730945 5.5597e-08 au
  Orbit Determination Parameters
   # obs. used (total)      222  
   data-arc span      6815 days (18.66 yr)  
   first obs. used      2000-08-28  
   last obs. used      2019-04-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53517  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 10:52:16  

Additional Information
 Earth MOID = 1.61326 au 
 Jupiter MOID = 2.1408 au 
 T_jup = 3.187 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457697.5 (2016-Nov-05.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1508755576859303 7.435e-08  
q 2.569890010858698 2.32e-07 au
tp 2457814.324997126901
(2017-Mar-01.82499713)
0.00016316 TDB
node 328.8947760683152 2.7523e-05 deg
peri 68.02341696379133 4.3286e-05 deg
i 13.29150112438632 9.3231e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      222  
   data-arc span      6815 days (18.66 yr)  
   first obs. used      2000-08-28  
   last obs. used      2019-04-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53517  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 10:52:16  

Additional Information
 Jupiter MOID = 2.1408 au 
 T_jup = 3.187 
Orbit Covariance (6×6)
  e q tp node peri i
e 5.527952450779481E-15 -1.697594387496574E-14 -6.225611902808887E-12 -1.17464575424063E-14 -1.405780491526329E-12 1.039481300235583E-14
q -1.697594387496574E-14 5.382548908341928E-14 2.069584803898959E-11 3.626307648635284E-14 4.592083727855711E-12 -2.999360332915095E-14
tp -6.225611902808887E-12 2.069584803898959E-11 2.662122691692336E-8 -6.041768712560109E-11 5.479140235822779E-9 -4.18088169973314E-11
node -1.17464575424063E-14 3.626307648635284E-14 -6.041768712560109E-11 7.57522665597962E-10 -7.472084134577189E-10 5.551221492446054E-11
peri -1.405780491526329E-12 4.592083727855711E-12 5.479140235822779E-9 -7.472084134577189E-10 1.873702978910937E-9 -6.258214074223993E-11
i 1.039481300235583E-14 -2.999360332915095E-14 -4.18088169973314E-11 5.551221492446054E-11 -6.258214074223993E-11 8.691981266646795E-11

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 15.5   n/a MPO470658  
diameter diameter 4.605 km 0.897 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.053   0.017 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

249161 (2008 BF21)          Discovered 2008-Jan-30 by Mt. Lemmon Survey at Mount Lemmon
Reference: 20100824/Numbers.arcLast Updated: 2010-08-27

[ show close-approach data ]
Alternate Designations
 2008 BF21 = 2000 QR248 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Feb-18 16:02 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin