Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Near-Earth Object (NEO) Program
Search JPL
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
91 Aegina
Classification: Main-belt Asteroid          SPK-ID: 2000091
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 89 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1069156673217618 5.3781e-08  
a 2.589223079001517 5.3789e-09 AU
q 2.312394565665163 1.395e-07 AU
i 2.106921240051141 3.5984e-06 deg
node 10.66905101410201 0.00014545 deg
peri 72.69706221504066 0.00014698 deg
M 102.7055406755632 1.8863e-05 deg
tp 2456366.345803274342
(2013-Mar-14.84580327)
7.9487e-05 JED
period 1521.782659369462
4.17
4.7421e-06
1.298e-08
d
yr
n .236564661703507 7.3716e-10 deg/d
Q 2.866051592337871 5.954e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      1516  
   data-arc span      53840 days (147.41 yr)  
   first obs. used      1866-11-10  
   last obs. used      2014-04-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .62326  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Apr-17 13:34:10  

Additional Information
 Earth MOID = 1.3287 AU 
 T_jup = 3.411 
[ 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 8.84 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 6
diameter diameter 109.81 km 3.3 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 6
rotation period rot_per 6.025 h n/a Asteroid Lightcurve DataBase (Rev. 2013-Sep-12) Published Reference List:
[Harris, A.W.; Young, J.W. (1980) Icarus 43, 20-32.]
[Shevchenko, V.G.; Piironen, J.; Erikson, A.; Bel'skaya, I.N.; et al. (1997) Planet. Space Sci. 45, 1615-1623.]
[Warner, B.D. (2009) Minor Planet Bul. 36, 109-116.]
geometric albedo albedo 0.0426   0.003 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 6
B-V BV .724 mag .014 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=3; phase (min.=4.15, mean=9.96, max.=21.15) deg.
U-B UB .317 mag .035 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=3; phase (min.=4.15, mean=9.96, max.=21.15) deg.
Tholen spectral type spec_T CP   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices; used ground-based radiometric albedo
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)

91 Aegina          Discovered 1866-Nov-04 by Stephan, E. at Marseille
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2014-Apr-18 03:04 UT
(server date/time)  
NASA Home Page
Site Manager:   Donald K. Yeomans
Webmaster  Alan B. Chamberlin