+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   41 Daphne Classification: Main-belt Asteroid          SPK-ID: 2000041 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: JPL 92 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2750171050011374 2.2164e-08   a 2.761305402082041 6.3299e-09 AU q 2.001899184377436 6.1319e-08 AU i 15.79088109201455 2.1967e-06 deg node 178.09450493634 9.9937e-06 deg peri 46.05935538383746 1.1509e-05 deg M 21.33973594761003 6.3297e-06 deg tp 2456301.152571311265 (2013-Jan-08.65257131) 2.9194e-05 JED period 1675.984858282655 4.59 5.763e-06 1.578e-08 d yr n .2147990766270312 7.386e-10 deg/d Q 3.520711619786645 8.0708e-09 AU   Orbit Determination Parameters    # obs. used (total)      1459      data-arc span      53584 days (146.70 yr)      first obs. used      1866-07-13      last obs. used      2013-03-28      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .5042      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 12:31:43   Additional Information  Earth MOID = 1.02823 AU   T_jup = 3.232  [ 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 7.12 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 8 magnitude slope G 0.10   n/a PDS3 (MPC 17257) Fit diameter diameter 174.00 km 11.7 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 8 rotation period rot_per 5.988 h n/a Asteroid Lightcurve DataBase (Rev. 2013-May-01) Published Reference List: [Scaltriti, F.; Zappala, V. (1977) Astron. Astrophys. 56, 7-11.] [Magnusson, P. (1986) Icarus 68, 1-39.] [Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R.; Greenberg, R.; et al. (1987) Icarus 70, 191-245.] [Drummond, J.D.; Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R. (1988) Icarus 76, 19-77.] [Magnusson, P. (1990) Icarus 85, 229-240.] [Drummond, J.D.; Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R. (1991) Icarus 89, 44-64.] [De Angelis, G. (1995) Planet. Space Sci. 43, 649-682.] [Behrend, R. (2001) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Kaasalainen, M.; Torppa, J.; Piironen, J. (2002) Astron. Astrophys. 383, L19-L22.] [Durech, J.; Kaasalainen, M.; Herald, D.; Dunham, D.; et al. (2011) Icarus 214, 652-670.] [Behrend, R. (2012) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] geometric albedo albedo 0.0828   0.012 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 8 B-V BV .726 mag .008 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=12; phase (min.=5.79, mean=17.09, max.=25.76) deg. U-B UB .363 mag .017 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=5; phase (min.=13.37, mean=16.59, max.=19.71) 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) 41 Daphne          Discovered 1856-May-22 by Goldschmidt, H. at Paris Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1949 TG  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2013-May-19 00:47 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin