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152 Atala
Classification: Main-belt Asteroid          SPK-ID: 2000152
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07673895048667834 6.6417e-08  
a 3.13987615833477 2.1553e-08 AU
q 2.898925357286016 2.0535e-07 AU
i 12.11223250748419 9.2105e-06 deg
node 39.97418217458834 3.3674e-05 deg
peri 59.18794499337984 6.5919e-05 deg
M 271.4359047819524 5.5856e-05 deg
tp 2457300.445190745012
(2015-Oct-04.94519074)
0.00031494 JED
period 2032.203549588436
5.56
2.0925e-05
5.729e-08
d
yr
n .1771476090930495 1.824e-09 deg/d
Q 3.380826959383524 2.3207e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      960  
   data-arc span      46868 days (128.32 yr)  
   first obs. used      1885-08-08  
   last obs. used      2013-12-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .58617  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Dec-19 20:18:00  

Additional Information
 Earth MOID = 1.9367 AU 
 T_jup = 3.172 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 8.33 mag n/a PDS3 (MPC 17257)  
rotation period rot_per 6.246 h n/a Asteroid Lightcurve DataBase (Rev. 2013-Sep-12) Published Reference List:
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Durech, J. (2006) IAU 2006, poster paper.]
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Durech, J.; Kaasalainen, M.; Warner, B.D.; Fauerbach, M.; et al. (2009) Astron. Astrophys. 493, 291-297.]
[Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.]
[Durech, J.; Kaasalainen, M.; Herald, D.; Dunham, D.; et al. (2011) Icarus 214, 652-670.]
[Hanus, J.; Marchis, F.; Durech, J. (2013) Icarus 226, 1045-1057.]
B-V BV .882 mag .026 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=3; phase (min.=3.71, mean=6.95, max.=13.05) deg.
U-B UB .452 mag .070 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=3; phase (min.=3.71, mean=6.95, max.=13.05) deg.
Tholen spectral type spec_T I   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices
SMASSII spectral type spec_B S   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)

152 Atala          Discovered 1875-Nov-02 by Henry, Paul at Paris
In their cooperative program it will probably never be known which of the Henry brothers discovered which planet. With strict impartiality, these discoveries were announced as having been made alternatively by Prosper and by Paul.
Note: "planet" implies "minor planet"
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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