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1131 Porzia (1929 RO)
Classification: Mars-crossing Asteroid          SPK-ID: 2001131
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2868229746439105 3.4477e-08  
a 2.227796546221378 5.8834e-09 AU
q 1.588813313932732 7.722e-08 AU
i 3.229412576123478 4.5948e-06 deg
node 100.7176525914954 6.6244e-05 deg
peri 248.0667933838464 6.6854e-05 deg
M 228.7637828540012 9.518e-06 deg
tp 2457443.254433872166
(2016-Feb-24.75443387)
3.3093e-05 JED
period 1214.539702989598
3.33
4.8112e-06
1.317e-08
d
yr
n .2964085892901299 1.1742e-09 deg/d
Q 2.866779778510023 7.5709e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      1822  
   data-arc span      31384 days (85.92 yr)  
   first obs. used      1929-09-10  
   last obs. used      2015-08-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .47173  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Sep-02 13:59:56  

Additional Information
 Earth MOID = .586365 AU 
 T_jup = 3.587 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.9 mag n/a MPO256870  
rotation period rot_per 4.6584 h n/a LCDB (Rev. 2015-July); Warner et al., 2009 Published Reference List:
[Behrend, R. (2009) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Benishek, V.; Protitch-Benishek, V. (2010) Minor Planet Bul. 37, 64-65.]
SMASSII spectral type spec_B S   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)

1131 Porzia (1929 RO)          Discovered 1929-Sep-10 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1929 RO = 1939 TJ = 1962 MB 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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