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4339 Almamater (1985 UK)
Classification: Main-belt Asteroid          SPK-ID: 2004339
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 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1779516475287001 1.5532e-08  
a 2.194956997380413 4.9702e-09 au
q 1.80436078344192 3.4539e-08 au
i 2.165624413933006 8.3941e-07 deg
node 300.3325362234746 2.1315e-05 deg
peri 72.96034703971287 2.3532e-05 deg
M 302.8908089671557 5.0816e-06 deg
tp 2459388.926056335010
(2021-Jun-23.42605634)
1.7197e-05 TDB
period 1187.783946048049
3.25
4.0344e-06
1.105e-08
d
yr
n .3030854232352431 1.0294e-09 deg/d
Q 2.585553211318907 5.8547e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2189  
   data-arc span      26989 days (73.89 yr)  
   first obs. used      1946-10-19  
   last obs. used      2020-09-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49283  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 16:13:44  

Additional Information
 Earth MOID = .804753 au 
 Jupiter MOID = 2.88708 au 
 T_jup = 3.648 
[ 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 14.06   n/a MPCxxxxx  
diameter diameter 4.156 km 0.349 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 30.84 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:
[Vander Haagen, G.A. (2012) Minor Planet Bull. 39, 48-50.]
geometric albedo albedo 0.371   0.056 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

4339 Almamater (1985 UK)          Discovered 1985-Oct-20 by Mrkos, A. at Klet
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1985 UK = 1946 UE = 1980 BC5 = 1988 QA1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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