+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1181 Lilith (1927 CQ) Classification: Main-belt Asteroid          SPK-ID: 2001181 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 37 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1949800145440839 3.5861e-08   a 2.665401824087366 9.393e-09 au q 2.145701737660984 9.4586e-08 au i 5.601238765453218 3.981e-06 deg node 260.701934248818 4.0463e-05 deg peri 156.0474334403462 4.1596e-05 deg M 219.5645984744707 1.0898e-05 deg tp 2459620.535509507130 (2022-Feb-10.03550951) 4.9511e-05 TDB period 1589.433867798567 4.35 8.4019e-06 2.3e-08 d yr n .2264957399571554 1.1973e-09 deg/d Q 3.185101910513748 1.1224e-08 au   Orbit Determination Parameters    # obs. used (total)      2276      data-arc span      32817 days (89.85 yr)      first obs. used      1930-12-18      last obs. used      2020-10-23      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .41971      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 04:21:39   Additional Information  Earth MOID = 1.15929 au   Jupiter MOID = 2.16813 au   T_jup = 3.349  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 11.3   n/a MPO473779   diameter diameter 20.492 km 0.276 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 15.033 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Ferrero, A. (2014) Minor Planet Bull. 41, 184-185.] [Polakis, T. (2018) Minor Planet Bull. 45, 199-203.] [Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.] geometric albedo albedo 0.106   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   SMASSII spectral type spec_B X   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) 1181 Lilith (1927 CQ)          Discovered 1927-Feb-11 by Jekhovsky, B. at Algiers Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1927 CQ = 1925 QF = 1943 WC = 1953 CA = 1964 PG = A914 BA  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-21 18:59 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin