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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 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .286822979293847 3.6971e-08  
a 2.227796546802619 6.1208e-09 AU
q 1.588813303988148 8.2323e-08 AU
i 3.229412392902232 4.9305e-06 deg
node 100.7176473750032 6.9061e-05 deg
peri 248.0667975750866 6.972e-05 deg
M 228.763783180554 9.571e-06 deg
tp 2457443.254432943742
(2016-Feb-24.75443294)
3.322e-05 JED
period 1214.539703464915
3.33
5.0054e-06
1.37e-08
d
yr
n .2964085891741285 1.2216e-09 deg/d
Q 2.866779789617091 7.8764e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      1666  
   data-arc span      30959 days (84.76 yr)  
   first obs. used      1929-09-10  
   last obs. used      2014-06-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .48673  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Mar-09 13:33:41  

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-May); 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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