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3924 Birch (1977 CU)
Classification: Main-belt Asteroid          SPK-ID: 2003924
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1103918526625818 1.9179e-08  
a 2.700038048731216 9.552e-09 au
q 2.401975846272315 5.3428e-08 au
i 6.700384879613985 5.4117e-07 deg
node 331.5922570482242 5.9309e-06 deg
peri 96.2000595488571 1.0978e-05 deg
M 18.79902304772517 6.1281e-06 deg
tp 2459115.877464680126
(2020-Sep-23.37746468)
2.753e-05 TDB
period 1620.515738387851
4.44
8.5994e-06
2.354e-08
d
yr
n .2221514987309788 1.1789e-09 deg/d
Q 2.998100251190117 1.0607e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2819  
   data-arc span      24076 days (65.92 yr)  
   first obs. used      1955-04-20  
   last obs. used      2021-03-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45039  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 21:18:45  

Additional Information
 Earth MOID = 1.42672 au 
 Jupiter MOID = 2.26576 au 
 T_jup = 3.349 
[ 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 12.42   n/a E2021B10  
diameter diameter 16.813 km 0.256 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 18.74 h n/a LCDB (Rev. 2020-October); 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, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2015) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.080   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

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

Alternate Designations
 1977 CU = 1968 DC = 1973 FC1 = 1975 TG = 1977 EB = 1978 LF = 1980 XH3 = 1984 SF5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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