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1191 Alfaterna (1931 CA)
Classification: Main-belt Asteroid          SPK-ID: 2001191
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 45 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0464448695497813 1.6906e-08  
a 2.891462654633254 1.0008e-08 au
q 2.757169048830748 4.6222e-08 au
i 18.49484531109365 6.8062e-07 deg
node 134.7078586295481 2.2198e-06 deg
peri 54.24568036527973 2.2548e-05 deg
M 57.65499082088708 2.0232e-05 deg
tp 2458912.886534768981
(2020-Mar-04.38653477)
0.00010103 TDB
period 1795.86963780517
4.92
9.3236e-06
2.553e-08
d
yr
n .2004599846345059 1.0407e-09 deg/d
Q 3.025756260435759 1.0473e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2461  
   data-arc span      32907 days (90.09 yr)  
   first obs. used      1931-02-09  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .33954  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 12:07:12  

Additional Information
 Earth MOID = 1.79539 au 
 Jupiter MOID = 2.034 au 
 T_jup = 3.212 
[ 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 10.83   n/a E2021B10  
diameter diameter 47.397 km 0.175 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 193.9 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.045   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

1191 Alfaterna (1931 CA)          Discovered 1931-Feb-11 by Volta, L. at Pino Torinese
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1931 CA = 1965 AA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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