+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   4775 Hansen (1927 TC) Classification: Mars-crossing Asteroid          SPK-ID: 2004775 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 35 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .452587461430162 1.4393e-08   a 2.394548023704022 4.9358e-09 au q 1.310805612383207 3.4692e-08 au i 9.270603782077309 7.0208e-07 deg node 336.4922539773768 4.1825e-06 deg peri 7.798813520914461 4.0271e-06 deg M 56.71644556884035 1.8479e-06 deg tp 2458987.273951351350 (2020-May-17.77395135) 6.4798e-06 TDB period 1353.423627726176 3.71 4.1847e-06 1.146e-08 d yr n .2659921052248948 8.2243e-10 deg/d Q 3.478290435024836 7.1697e-09 au   Orbit Determination Parameters    # obs. used (total)      2149      data-arc span      34121 days (93.42 yr)      first obs. used      1927-10-03      last obs. used      2021-03-04      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .47634      source      ORB      producer      Otto Matic      solution date      2021-Apr-12 16:45:36   Additional Information  Earth MOID = .301935 au   Jupiter MOID = 1.95196 au   T_jup = 3.367  [ 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 13.91   n/a E2021B10   rotation period rot_per 3.1185 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Pravec, P.; Wolf, M.; Sarounova, L. (2016) http://www.asu.cas.cz/~ppravec/neo.htm] [Sada, P.V.; Olguin, L.; Saucedo, J.C.; Loera-Gonzalez, P.; et al. (2017) Minor Planet Bull. 44, 239-242.] [Warner, B.D. (2017) Minor Planet Bull. 44, 116-120.] 4775 Hansen (1927 TC)          Discovered 1927-Oct-03 by Wolf, M. at Heidelberg Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1927 TC = 1990 JA  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-18 13:13 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin