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1218 Aster (1932 BJ)
Classification: Main-belt Asteroid          SPK-ID: 2001218
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 48 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1096230856475561 1.4349e-08  
a 2.262485641901083 4.8078e-09 au
q 2.014464984602595 3.2586e-08 au
i 3.157054115468394 7.7283e-07 deg
node 63.81331653395536 4.9806e-06 deg
peri 68.90833948235324 9.1568e-06 deg
M 101.3837893552189 9.7785e-06 deg
tp 2459046.439431856027
(2020-Jul-15.93943186)
3.3429e-05 TDB
period 1243.017304179536
3.40
3.9621e-06
1.085e-08
d
yr
n .2896178506844047 9.2315e-10 deg/d
Q 2.510506299199572 5.3348e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3073  
   data-arc span      32656 days (89.41 yr)  
   first obs. used      1932-01-29  
   last obs. used      2021-06-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42184  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 12:07:03  

Additional Information
 Earth MOID = 1.03202 au 
 Jupiter MOID = 2.51511 au 
 T_jup = 3.609 
[ 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 13.26   n/a MPO614063  
diameter diameter 5.554 km 0.084 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 3.1581 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Franco, L.; Klinglesmith III, D.A.; Pilcher, F. (2017) Minor Planet Bull. 44, 185-186.]
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
[Sada, P.V.; Loera-Gonzalez, P.; Olguin, L.; Saucedo-Morales. J.C.; et al. (2018) Minor Planet Bull. 45, 122-124.]
geometric albedo albedo 0.332   0.043 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

1218 Aster (1932 BJ)          Discovered 1932-Jan-29 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1932 BJ = 1978 TJ5 = 1978 VQ12 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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