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98 Ianthe
Classification: Main-belt Asteroid          SPK-ID: 2000098
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 61 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1858697571679619 3.0851e-08  
a 2.688671098932606 1.0205e-08 au
q 2.188928454669485 8.2393e-08 au
i 15.57807803472689 3.176e-06 deg
node 354.000099440062 1.5858e-05 deg
peri 158.6435929384365 1.9813e-05 deg
M 217.3569790092392 1.1693e-05 deg
tp 2458038.547442886183
(2017-Oct-12.04744289)
5.3456e-05 JED
period 1610.293148894427
4.41
9.1683e-06
2.51e-08
d
yr
n .2235617783303393 1.2729e-09 deg/d
Q 3.188413743195727 1.2102e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1336  
   data-arc span      53013 days (145.14 yr)  
   first obs. used      1870-10-17  
   last obs. used      2015-12-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .57836  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 12:31:03  

Additional Information
 Earth MOID = 1.20461 au 
 Jupiter MOID = 1.81566 au 
 T_jup = 3.296 
[ 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: 23
diameter diameter 104.45 km 1.8 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 23
rotation period rot_per 16.479 h n/a LCDB (Rev. 2015-December); Warner et al., 2009 Published Reference List:
[Magnusson, P.; Lagerkvist, C.-I. (1991) Astron. Astrophys. Suppl. Ser. 87, 269-275.]
[Pilcher, F. (2008) Minor Planet Bul. 35, 71-72.]
[Behrend, R. (2009) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2011) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2015) Astron. Astrophys., in press.arXiv:1510.07422]
geometric albedo albedo 0.0471   0.002 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 23
B-V BV .749 mag .020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=2; phase (min.=11.51, mean=16.35, max.=21.20) deg.
U-B UB .375 mag .056 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=2; phase (min.=11.51, mean=16.35, max.=21.20) deg.
Tholen spectral type spec_T CG   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices
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)

98 Ianthe          Discovered 1868-Apr-18 by Peters, C. H. F. at Clinton
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1931 RK1 = 1949 SE1 = 1975 XO 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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