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14 Irene
Classification: Main-belt Asteroid          SPK-ID: 2000014
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 62 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1660831635510314 2.6177e-08  
a 2.586682877835678 3.3053e-09 AU
q 2.157078402381442 6.8205e-08 AU
i 9.118068811993174 3.5241e-06 deg
node 86.16005476181408 1.952e-05 deg
peri 98.0012507185573 2.1811e-05 deg
M 145.5578772374023 9.6712e-06 deg
tp 2456386.106769395741
(2013-Apr-03.60676940)
4.0908e-05 JED
period 1519.543752735485
4.16
2.9125e-06
7.974e-09
d
yr
n .2369132177681146 4.5409e-10 deg/d
Q 3.016287353289913 3.8542e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      2255  
   data-arc span      59641 days (163.29 yr)  
   first obs. used      1851-05-20  
   last obs. used      2014-09-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .57528  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Sep-12 13:33:11  

Additional Information
 Earth MOID = 1.18251 AU 
 T_jup = 3.385 
[ 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 6.30 mag n/a PDS3 (MPC 17257)  
diameter diameter 152 km n/a Dunham occult. list: Dunham 1998: 167x139 km Yeomans E-mail 2001-Apr-04
rotation period rot_per 15.028 h n/a Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) Published Reference List:
[Bel'skaya, I.N.; Dovgopol, A.N.; Erikson, A.; Lagerkvist, C.-I.; Oja, T. (1993) Astron. Astrophys. Suppl. Ser. 101, 507-511.]
[Pilcher, F. (2009) Minor Planet Bul. 36, 133-136.]
[Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.]
[Aymami, J.M. (2012) Minor Planet Bul. 39, 179-181.]
[Hanus, J.; Marchis, F.; Durech, J. (2013) Icarus 226, 1045-1057.]
geometric albedo albedo 0.159   n/a EAR-A-5-DDR-ALBEDOS-V1.0:TRIAD TRIAD quality code 3
B-V BV .833 mag .018 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=13; phase (min.=1.04, mean=8.54, max.=23.04) deg.
U-B UB .388 mag .031 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=10; phase (min.=1.04, mean=8.02, max.=23.04) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
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)

14 Irene          Discovered 1851-May-19 by Hind, J. R. at London
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1952 TM = A906 QC = A913 EA 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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