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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 88 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2788184514109588 2.8251e-08  
a 2.744958556992134 7.2573e-09 au
q 1.979613462944327 7.6114e-08 au
i 10.58532590637449 3.9628e-06 deg
node 89.63169310986333 1.4274e-05 deg
peri 315.9119443935318 1.5867e-05 deg
M 296.4066234888926 8.7247e-06 deg
tp 2459493.934719406027
(2021-Oct-06.43471941)
4.1163e-05 TDB
period 1661.124236227948
4.55
6.5877e-06
1.804e-08
d
yr
n .2167206956280897 8.5947e-10 deg/d
Q 3.510303651039941 9.2807e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2807  
   data-arc span      42674 days (116.84 yr)  
   first obs. used      1904-01-10  
   last obs. used      2020-11-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41859  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:54:14  

Additional Information
 Earth MOID = 1.00425 au 
 Jupiter MOID = 1.93262 au 
 T_jup = 3.267 
[ hide covariance matrix ]
Orbital Elements at Epoch 2454790.5 (2008-Nov-20.0) TDB
Reference: JPL 88 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2818864940667571 2.8601e-08  
q 1.968440642878243 7.763e-08 au
tp 2454524.190439047706
(2008-Feb-27.69043905)
3.021e-05 TDB
node 89.6994136237991 1.4278e-05 deg
peri 316.1921358626265 1.5813e-05 deg
i 10.59287286882208 3.9641e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2807  
   data-arc span      42674 days (116.84 yr)  
   first obs. used      1904-01-10  
   last obs. used      2020-11-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41859  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:54:14  

Additional Information
 Jupiter MOID = 1.93262 au 
 T_jup = 3.267 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.179941106722786E-16 -2.216177146026913E-15 4.558054288448697E-13 -1.145133761748289E-15 9.894149059726957E-14 -1.74954354143201E-15
q -2.216177146026913E-15 6.02645691454986E-15 -1.199508317077348E-12 3.887057223326967E-15 -2.621003879666354E-13 5.012729754984768E-15
tp 4.558054288448697E-13 -1.199508317077348E-12 9.126717098932582E-10 -3.923654884298464E-12 2.120735494403136E-10 -2.310455682294125E-12
node -1.145133761748289E-15 3.887057223326967E-15 -3.923654884298464E-12 2.038745889722669E-10 -2.005364116133482E-10 5.470200587955729E-12
peri 9.894149059726957E-14 -2.621003879666354E-13 2.120735494403136E-10 -2.005364116133482E-10 2.500556598467179E-10 -5.748264812330317E-12
i -1.74954354143201E-15 5.012729754984768E-15 -2.310455682294125E-12 5.470200587955729E-12 -5.748264812330317E-12 1.571370086550983E-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. 2020-October); 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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