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 ]  
238 Hypatia
Classification: Main-belt Asteroid          SPK-ID: 2000238
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 64 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08656849297170585 3.3662e-08  
a 2.907622184241585 1.1761e-08 AU
q 2.655913713620691 9.8984e-08 AU
i 12.39252127253126 3.8244e-06 deg
node 183.9447511031418 2.0712e-05 deg
peri 209.9385724461059 3.1111e-05 deg
M 51.73496580690386 2.3582e-05 deg
tp 2456740.252208280029
(2014-Mar-23.75220828)
0.00011852 JED
period 1810.945528965386
4.96
1.0987e-05
3.008e-08
d
yr
n .1987911807627213 1.2061e-09 deg/d
Q 3.159330654862479 1.2779e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1461  
   data-arc span      44979 days (123.15 yr)  
   first obs. used      1892-03-18  
   last obs. used      2015-05-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .59686  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Sep-02 13:54:59  

Additional Information
 Earth MOID = 1.66705 AU 
 T_jup = 3.244 
[ 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 8.18 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 17
diameter diameter 148.49 km 3.6 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 17
rotation period rot_per 8.8749 h n/a LCDB (Rev. 2015-July); Warner et al., 2009 Published Reference List:
[Shevchenko, V.G.; Chiornij, V.G.; Krugly, Yu.N.; Lupishko, D.F.; et al. (1992) Icarus 100, 295-306.]
[Lagerkvist, C.-I.; Magnusson, P.; Debehogne, H.; Hoffmann, M.; et al. (1992) Astron. Astrophys. Suppl. Ser. 95, 461-470.]
[Behrend, R. (2004) 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]
geometric albedo albedo 0.0428   0.002 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 17
B-V BV .739 mag .010 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=4; phase (min.=8.66, mean=13.76, max.=18.19) deg.
U-B UB .383 mag .036 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=5; phase (min.=8.66, mean=13.04, max.=18.19) deg.
Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 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)

238 Hypatia          Discovered 1884-Jul-01 by Knorre, V. at Berlin
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1947 HA 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2015-Sep-04 16:34 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin