+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   182 Elsa (A878 CC) Classification: Main-belt Asteroid          SPK-ID: 2000182 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 111 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1865700890609992 1.8461e-08   a 2.41609040588014 5.1312e-09 au q 1.965320203675657 4.6047e-08 au i 2.005408333143066 5.1781e-07 deg node 107.1827413357763 6.428e-06 deg peri 310.8247207130679 7.279e-06 deg M 79.59184357335509 5.8611e-06 deg tp 2458897.226640895426 (2020-Feb-17.72664090) 2.1922e-05 TDB period 1371.728614088748 3.76 4.3699e-06 1.196e-08 d yr n .2624425825214351 8.3606e-10 deg/d Q 2.866860608084623 6.0886e-09 au   Orbit Determination Parameters    # obs. used (total)      3053      data-arc span      42803 days (117.19 yr)      first obs. used      1904-01-14      last obs. used      2021-03-23      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .49715      source      ORB      producer      Otto Matic      solution date      2021-May-03 17:59:57   Additional Information  Earth MOID = .977547 au   Jupiter MOID = 2.47262 au   T_jup = 3.492  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 9.16   n/a E2021B10 IRAS observations used: 14 diameter diameter 39.520 km 0.387 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 80.088 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Harris, A.W.; Young, J.W. (1980) Icarus 43, 20-32.] [Durech, J.; Kaasalainen, M.; Warner, B.D.; Fauerbach, M.; et al. (2009) Astron. Astrophys. 493, 291-297.] [Gandolfi, D.; Cigna, M.; Fulvio, D.; Blanco, C. (2009) Planet. Space Sci. 57, 1-9.] [Pilcher, F.; Benishek, V.; Krajewski, R. (2009) Minor Planet Bull. 36, 40.] [Durech, J. (2011) Database of Asteroid Models from Inversion Techniques (DAMIT). http://astro.troja.mff.cuni.cz/projects/asteroids3D/web.php] geometric albedo albedo 0.196   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   B-V BV 0.862   0.043 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=10.53, mean=17.27, max.=27.13) deg. U-B UB 0.425   0.038 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=10.53, mean=16.47, max.=27.13) deg. Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 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) 182 Elsa (A878 CC)          Discovered 1878-Feb-07 by Palisa, J. at Pola Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  A878 CC = 1948 XS = 1950 HY  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jun-23 03:42 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin