+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   17725 (1997 YQ7) Classification: Main-belt Asteroid          SPK-ID: 2017725 [ 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 33 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1660374676779003 2.2546e-08   a 2.689424394064815 1.1448e-08 au q 2.242879178163122 5.9886e-08 au i 11.4817265182169 6.8162e-07 deg node 336.3656504214955 4.4676e-06 deg peri 86.66940954724815 1.1398e-05 deg M 121.6550121151104 7.8477e-06 deg tp 2458656.103979262320 (2019-Jun-21.60397926) 3.3813e-05 TDB period 1610.969939159806 4.41 1.0286e-05 2.816e-08 d yr n .2234678570028167 1.4268e-09 deg/d Q 3.135969609966508 1.3349e-08 au   Orbit Determination Parameters    # obs. used (total)      1903      data-arc span      16959 days (46.43 yr)      first obs. used      1974-09-22      last obs. used      2021-02-26      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .43038      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 02:10:56   Additional Information  Earth MOID = 1.28987 au   Jupiter MOID = 2.27445 au   T_jup = 3.324  [ 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 13.37   n/a E2021B10   diameter diameter 6.427 km 1.160 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)   geometric albedo albedo 0.352   0.171 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   17725 (1997 YQ7)          Discovered 1997-Dec-27 by Kobayashi, T. at Oizumi Reference: 20001013/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1997 YQ7 = 1974 SS3 = 1979 YP2 = 1983 TX1  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-20 02:42 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin