Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Near-Earth Object (NEO) Program
Search JPL
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
JPL Small-Body Database Browser
Search: [ help ]  
3924 Birch (1977 CU)
Classification: Main-belt Asteroid          SPK-ID: 2003924
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ hide orbit diagram ]
Orbit Diagram
Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet was implemented using 2-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet has stopped working because of a recent Java upgrade, here is a possible workaround.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).

Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1091188045299996 5.0765e-08  
a 2.7007840726167 2.3726e-08 AU
q 2.406077743319102 1.3572e-07 AU
i 6.705647544214123 7.4326e-06 deg
node 331.8233447726097 4.9744e-05 deg
peri 94.6815172608018 6.1651e-05 deg
M 251.5811813866978 3.6835e-05 deg
tp 2457488.742288344301
0.0001681 JED
period 1621.187410562532
n .2220594594150496 2.9261e-09 deg/d
Q 2.995490401914298 2.6315e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1152  
   data-arc span      21627 days (59.21 yr)  
   first obs. used      1955-04-20  
   last obs. used      2014-07-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53117  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 12:07:38  

Additional Information
 Earth MOID = 1.43081 AU 
 T_jup = 3.349 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.2 mag n/a MPO267723  
rotation period rot_per 18.5 h n/a LCDB (Rev. 2015-Feb); 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:
[Behrend, R. (2008) Observatoire de Geneve web site,]

3924 Birch (1977 CU)          Discovered 1977-Feb-11 by Bowell, E. at Palomar
on plates taken by C. Kowal.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1977 CU = 1968 DC = 1973 FC1 = 1975 TG = 1977 EB = 1978 LF = 1980 XH3 = 1984 SF5 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
FirstGov 2015-Mar-31 12:37 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin