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JPL Small-Body Database Browser
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1155 Aenna (1928 BD)
Classification: Main-belt Asteroid          SPK-ID: 2001155
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1639391787904103 3.4098e-08  
a 2.464319134655998 7.7123e-09 au
q 2.060320679442999 8.4974e-08 au
i 6.591559661352139 4.0503e-06 deg
node 39.11578015082403 3.1843e-05 deg
peri 195.4642284067703 3.4272e-05 deg
M 245.879490133903 1.4953e-05 deg
tp 2459448.424743059419
(2021-Aug-21.92474306)
5.9558e-05 TDB
period 1413.005494723049
3.87
6.6332e-06
1.816e-08
d
yr
n .2547760793177669 1.196e-09 deg/d
Q 2.868317589868997 8.9767e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3285  
   data-arc span      33610 days (92.02 yr)  
   first obs. used      1928-01-26  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .35304  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:47:01  

Additional Information
 Earth MOID = 1.05014 au 
 Jupiter MOID = 2.13045 au 
 T_jup = 3.460 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.0   n/a MPO502164  
diameter diameter 9.284 km 0.524 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 8.07 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:
[Behrend, R. (2015) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Mas, V.; Fornas, G.; Lozano, J.; Rodrigo, O.; et al. (2018) Minor Planet Bull. 45, 76-82.]
geometric albedo albedo 0.356   0.040 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
SMASSII spectral type spec_B Xe   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

1155 Aenna (1928 BD)          Discovered 1928-Jan-26 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1928 BD = 1928 FU = 1941 UZ = 1982 DR6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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