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521 Brixia (1904 NB)
Classification: Main-belt Asteroid          SPK-ID: 2000521
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 51 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .283037980153074 3.8802e-08  
a 2.738310817555842 6.6775e-09 AU
q 1.963264854723524 1.0569e-07 AU
i 10.59899600680113 5.8829e-06 deg
node 89.66490730555033 1.6678e-05 deg
peri 316.0823354632744 1.9533e-05 deg
M 134.8672682547011 9.7286e-06 deg
tp 2456180.450159455960
(2012-Sep-09.95015946)
4.3848e-05 JED
period 1655.093526283191
4.53
6.054e-06
1.657e-08
d
yr
n .2175103668059439 7.9561e-10 deg/d
Q 3.513356780388161 8.5675e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      1242  
   data-arc span      40263 days (110.23 yr)  
   first obs. used      1904-01-10  
   last obs. used      2014-04-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .58154  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Apr-17 13:35:36  

Additional Information
 Earth MOID = .987682 AU 
 T_jup = 3.268 
[ 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 8.31 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 36
magnitude slope G -0.06   n/a PDS3 (MPC 17259) Fit
diameter diameter 115.65 km 2.0 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 36
rotation period rot_per 9.78 h n/a Asteroid Lightcurve DataBase (Rev. 2013-Sep-12) Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Warner, B.D. (2009) Minor Planet Bul. 36, 172-176.]
geometric albedo albedo 0.0626   0.002 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 36
B-V BV .712 mag .015 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=5; phase (min.=8.37, mean=16.47, max.=24.99) deg.
U-B UB .341 mag .030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #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 (1904 NB)          Discovered 1904-Jan-10 by Dugan, R. S. at Heidelberg (024)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1904 NB = 1948 QU 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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