Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
1131 Porzia (1929 RO)
Classification: Mars-crossing Asteroid          SPK-ID: 2001131
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .285740363867474 2.633e-08  
a 2.228866131373798 4.6176e-09 au
q 1.59198911198316 5.8058e-08 au
i 3.229923394392818 3.479e-06 deg
node 100.6759628853018 5.7451e-05 deg
peri 248.0601487531731 5.785e-05 deg
M 101.372438660138 7.4448e-06 deg
tp 2458658.251307430605
(2019-Jun-23.75130743)
2.4676e-05 TDB
period 1215.414475112464
3.33
3.777e-06
1.034e-08
d
yr
n .2961952546818967 9.2045e-10 deg/d
Q 2.865743150764436 5.937e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2802  
   data-arc span      32989 days (90.32 yr)  
   first obs. used      1929-09-10  
   last obs. used      2020-01-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46281  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 17:52:27  

Additional Information
 Earth MOID = .589188 au 
 Jupiter MOID = 2.56666 au 
 T_jup = 3.587 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.9   n/a MPO435706  
rotation period rot_per 4.6584 h n/a LCDB (Rev. 2019-August); 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 Bull. 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 | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Feb-20 19:13 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin