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254 Augusta
Classification: Main-belt Asteroid          SPK-ID: 2000254
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1220527236110381 3.5238e-08  
a 2.194869970620053 5.7573e-09 au
q 1.926980112733796 7.8146e-08 au
i 4.511839030900074 4.3014e-06 deg
node 28.44179283334624 4.1249e-05 deg
peri 233.1933883604972 4.5296e-05 deg
M 45.2439494905932 2.0932e-05 deg
tp 2458851.230997710139
(2020-Jan-02.73099771)
6.8858e-05 TDB
period 1187.713305964204
3.25
4.6732e-06
1.279e-08
d
yr
n .3031034494538615 1.1926e-09 deg/d
Q 2.462759828506309 6.46e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2901  
   data-arc span      48616 days (133.10 yr)  
   first obs. used      1886-04-01  
   last obs. used      2019-05-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4084  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-29 19:05:13  

Additional Information
 Earth MOID = .915786 au 
 Jupiter MOID = 2.59147 au 
 T_jup = 3.656 
[ 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 11.7   n/a MPO473764 IRAS observations used: 2
diameter diameter 12.467 km 0.137 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 5.8949 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Lagerkvist, C.-I. (1978) Astron. Astrophys. Suppl. Ser. 31, 361-381.]
[Behrend, R. (2014) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Pilcher, F. (2015) Minor Planet Bull. 42, 91-94.]
[Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
geometric albedo albedo 0.170   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.845   0.049 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=6.11, mean=7.99, max.=9.87) deg.
U-B UB 0.505   0.030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=6.11 deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices

254 Augusta          Discovered 1886-Mar-31 by Palisa, J. at Vienna
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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