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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 ]

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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1781412407444955 2.8197e-08  
a 2.194277801720574 5.6776e-09 au
q 1.803386431583966 6.3117e-08 au
i 2.165742387860651 3.3175e-06 deg
node 300.332201090781 7.3594e-05 deg
peri 73.07152752229138 7.4295e-05 deg
M 242.1644684577329 1.1781e-05 deg
tp 2459389.106093057403
(2021-Jun-23.60609306)
3.9851e-05 TDB
period 1187.232676507972
3.25
4.6079e-06
1.262e-08
d
yr
n .303226155347134 1.1769e-09 deg/d
Q 2.585169171857181 6.689e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2156  
   data-arc span      26989 days (73.89 yr)  
   first obs. used      1946-10-19  
   last obs. used      2020-09-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49505  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:52:23  

Additional Information
 Earth MOID = .805272 au 
 Jupiter MOID = 2.88635 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 14.0   n/a MPO309182  
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. 2019-August); 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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