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 ]  
1643 Brown (1951 RQ)
Classification: Main-belt Asteroid          SPK-ID: 2001643
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ 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 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2024960666021972 4.4988e-08  
a 2.488351678443053 6.1032e-09 au
q 1.98447025123536 1.1002e-07 au
i 3.514918952665215 2.8183e-06 deg
node 287.9173508667433 6.5622e-05 deg
peri 90.22846473336556 6.5916e-05 deg
M 158.4104324928823 6.8425e-06 deg
tp 2458369.619150527737
(2018-Sep-08.11915053)
2.6578e-05 TDB
period 1433.725684829624
3.93
5.2747e-06
1.444e-08
d
yr
n .2510940578167715 9.2379e-10 deg/d
Q 2.992233105650747 7.339e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3210  
   data-arc span      31919 days (87.39 yr)  
   first obs. used      1933-01-25  
   last obs. used      2020-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43376  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:34:20  

Additional Information
 Earth MOID = .990185 au 
 Jupiter MOID = 2.49167 au 
 T_jup = 3.443 
[ 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 12.5   n/a MPO502169  
diameter diameter 9.505 km 0.058 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 5.932 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Carbognani, A. (2011) Minor Planet Bull. 38, 57-63.]
[Durkee, R.I. (2011) Minor Planet Bull. 38, 39-40.]
[Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.]
geometric albedo albedo 0.179   0.036 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

1643 Brown (1951 RQ)          Discovered 1951-Sep-04 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1951 RQ = 1933 BG = 1951 SR 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Oct-01 09:01 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin