+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1722 Goffin (1938 EG) Classification: Main-belt Asteroid          SPK-ID: 2001722 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 39 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .0500238800581382 3.2587e-08   a 2.513244042632334 7.8824e-09 au q 2.387521824086864 8.3461e-08 au i 5.46582566174272 3.6289e-06 deg node 168.025329540087 3.8191e-05 deg peri 284.9743012158429 5.4299e-05 deg M 287.5288655968947 3.989e-05 deg tp 2459293.463137605053 (2021-Mar-19.96313761) 0.00016171 TDB period 1455.292930164205 3.98 6.8464e-06 1.874e-08 d yr n .2473728776785716 1.1638e-09 deg/d Q 2.638966261177805 8.2767e-09 au   Orbit Determination Parameters    # obs. used (total)      2654      data-arc span      30113 days (82.44 yr)      first obs. used      1938-02-23      last obs. used      2020-08-04      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .45379      source      ORB      producer      Otto Matic      solution date      2020-Aug-24 22:39:55   Additional Information  Earth MOID = 1.41129 au   Jupiter MOID = 2.43565 au   T_jup = 3.452  [ 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 12.0   n/a MPO492770   diameter diameter 10.290 km 0.118 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 29.19 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List: [Pravec, P.; Wolf, M.; Sarounova, L. (1984) http://www.asu.cas.cz/~ppravec/neo.htm] [Ditteon, R.; Adam, A.; Doyel, M.; Gibson, J.; et al. (2018) Minor Planet Bull. 45, 13-16.] geometric albedo albedo 0.224   0.041 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   B-V BV 0.890   0.030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=5.11 deg. 1722 Goffin (1938 EG)          Discovered 1938-Feb-23 by Delporte, E. at Uccle Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1938 EG = 1942 DJ = 1950 HK = 1952 SW = 1952 UQ = 1960 WB = 1964 UF = 1964 VD1  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Sep-24 10:54 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin