Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1097953075217915 3.3773e-08  
a 2.262993232289875 5.7239e-09 au
q 2.014527194430875 7.7819e-08 au
i 3.156987387700644 3.4196e-06 deg
node 63.81837747388246 6.2729e-05 deg
peri 69.00395186520032 6.4847e-05 deg
M 346.6133929719566 1.6123e-05 deg
tp 2459046.737178379681
(2020-Jul-16.23717838)
5.5711e-05 TDB
period 1243.435635468716
3.40
4.7176e-06
1.292e-08
d
yr
n .2895204140295506 1.0984e-09 deg/d
Q 2.511459270148874 6.3523e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2545  
   data-arc span      32233 days (88.25 yr)  
   first obs. used      1932-01-29  
   last obs. used      2020-04-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .438  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:21:04  

Additional Information
 Earth MOID = 1.03147 au 
 Jupiter MOID = 2.51523 au 
 T_jup = 3.608 
[ 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 13.1   n/a MPO412170  
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. 2019-August); 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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Jul-03 15:22 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin