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254 Augusta (A886 FA)
Classification: Main-belt Asteroid          SPK-ID: 2000254
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 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1218313289184072 1.5414e-08  
a 2.194471167544171 4.2837e-09 au
q 1.927115828929136 3.3885e-08 au
i 4.512098064365778 4.2627e-07 deg
node 28.43462807424095 3.6467e-06 deg
peri 233.0911428157891 7.4599e-06 deg
M 165.4311409535916 7.493e-06 deg
tp 2458850.857726430718
(2020-Jan-02.35772643)
2.4654e-05 TDB
period 1187.389613301685
3.25
3.4768e-06
9.519e-09
d
yr
n .3031860780716913 8.8775e-10 deg/d
Q 2.461826506159206 4.8056e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3749  
   data-arc span      49282 days (134.93 yr)  
   first obs. used      1886-04-01  
   last obs. used      2021-03-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .37889  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 09:17:32  

Additional Information
 Earth MOID = .915973 au 
 Jupiter MOID = 2.5897 au 
 T_jup = 3.656 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456925.5 (2014-Sep-25.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1222795363647282 1.5394e-08  
q 1.925980855355093 3.3858e-08 au
tp 2456475.986632128478
(2013-Jul-02.48663213)
2.5529e-05 TDB
node 28.49936619581566 3.6473e-06 deg
peri 233.1496142828569 7.4464e-06 deg
i 4.51243961909578 4.2622e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      3749  
   data-arc span      49282 days (134.93 yr)  
   first obs. used      1886-04-01  
   last obs. used      2021-03-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .37889  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 09:17:32  

Additional Information
 Jupiter MOID = 2.5897 au 
 T_jup = 3.656 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.369883965500262E-16 -5.179811693137113E-16 -3.391714264048133E-13 2.31456755219161E-15 -9.095559065946972E-14 2.340477071138136E-16
q -5.179811693137113E-16 1.146386382238768E-15 7.186474791096264E-13 -4.953523067910677E-15 1.946071271721319E-13 -4.679712810538883E-16
tp -3.391714264048133E-13 7.186474791096264E-13 6.51727891141037E-10 4.234421434266799E-12 1.661774426163786E-10 2.656560487897492E-13
node 2.31456755219161E-15 -4.953523067910677E-15 4.234421434266799E-12 1.330295587606271E-11 -1.179864716102885E-11 9.582947262986978E-14
peri -9.095559065946972E-14 1.946071271721319E-13 1.661774426163786E-10 -1.179864716102885E-11 5.544891277519758E-11 -4.953221116336168E-14
i 2.340477071138136E-16 -4.679712810538883E-16 2.656560487897492E-13 9.582947262986978E-14 -4.953221116336168E-14 1.816665046820248E-13

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.76   n/a E2021B10 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. 2020-October); 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.]
[Erasmus, N.; Navarro-Meza, S.; McNeill, A.; Trilling, D.E.; et al. (2020) Ap. J. Suppl. Ser. 247, A13.]
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 (A886 FA)          Discovered 1886-Mar-31 by Palisa, J. at Vienna
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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