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521 Brixia (A904 AE)
Classification: Main-belt Asteroid          SPK-ID: 2000521
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 86 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2796272133261383 2.858e-08  
a 2.744848630791094 6.7235e-09 au
q 1.977314257160914 7.7233e-08 au
i 10.59382698030115 3.9728e-06 deg
node 89.64884184727788 1.4363e-05 deg
peri 315.9180178836156 1.5934e-05 deg
M 253.1310941461622 8.6373e-06 deg
tp 2459493.588516568323
(2021-Oct-06.08851657)
4.1264e-05 TDB
period 1661.024453711307
4.55
6.103e-06
1.671e-08
d
yr
n .216733714663643 7.9633e-10 deg/d
Q 3.512383004421274 8.6036e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2697  
   data-arc span      42578 days (116.57 yr)  
   first obs. used      1904-01-10  
   last obs. used      2020-08-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42559  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:17:29  

Additional Information
 Earth MOID = 1.00281 au 
 Jupiter MOID = 1.92977 au 
 T_jup = 3.267 
[ hide covariance matrix ]
Orbital Elements at Epoch 2454707.5 (2008-Aug-29.0) TDB
Reference: JPL 86 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2818388114289277 2.8855e-08  
q 1.968528925758454 7.8228e-08 au
tp 2454524.188852105337
(2008-Feb-27.68885211)
3.0241e-05 TDB
node 89.70046468218341 1.4386e-05 deg
peri 316.1947044966294 1.5902e-05 deg
i 10.59313617594602 3.9712e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2697  
   data-arc span      42578 days (116.57 yr)  
   first obs. used      1904-01-10  
   last obs. used      2020-08-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42559  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:17:29  

Additional Information
 Jupiter MOID = 1.92977 au 
 T_jup = 3.267 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.326154177131419E-16 -2.253119877584908E-15 4.603687130609346E-13 -6.894150538856862E-16 9.823649954205427E-14 -1.826872799621899E-15
q -2.253119877584908E-15 6.119684963056944E-15 -1.21106686247586E-12 2.723206063047491E-15 -2.602729280513038E-13 5.219735340507409E-15
tp 4.603687130609346E-13 -1.21106686247586E-12 9.145302378035667E-10 -3.428350581725689E-12 2.11640455273224E-10 -2.380119314248347E-12
node -6.894150538856862E-16 2.723206063047491E-15 -3.428350581725689E-12 2.069664163707327E-10 -2.034659400718134E-10 5.077486558636903E-12
peri 9.823649954205427E-14 -2.602729280513038E-13 2.11640455273224E-10 -2.034659400718134E-10 2.528776790655125E-10 -5.375422976786399E-12
i -1.826872799621899E-15 5.219735340507409E-15 -2.380119314248347E-12 5.077486558636903E-12 -5.375422976786399E-12 1.577082078853685E-11

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 8.5   n/a MPO492755 IRAS observations used: 36
magnitude slope G -0.06   n/a PDS3 (MPC 17259) Fit
diameter diameter 107.227 km 0.494 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 28.479 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Wang, X.-b.; Gu, S.-h.; Li, X.-j. (2010) Earth, Moon, and Planets 106, 97-104.]
[Pilcher, F. (2015) Minor Planet Bull. 42, 280-281.]
geometric albedo albedo 0.073   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.712   0.015 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=8.37, mean=16.47, max.=24.99) deg.
U-B UB 0.341   0.030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=8.37, mean=14.34, max.=17.58) deg.
Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices
SMASSII spectral type spec_B Ch   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)

521 Brixia (A904 AE)          Discovered 1904-Jan-10 by Dugan, R. S. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A904 AE = 1948 QU 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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