+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1260 Walhalla (1933 BW) Classification: Main-belt Asteroid          SPK-ID: 2001260 [ 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 41 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .03763455917809546 3.2517e-08   a 2.613039844887415 8.6183e-09 au q 2.514699242210278 8.4232e-08 au i 8.017015756540948 3.362e-06 deg node 304.527950264317 3.0048e-05 deg peri 18.9790697079657 6.2395e-05 deg M 43.67907233519176 5.4571e-05 deg tp 2458813.307527588646 (2019-Nov-25.80752759) 0.00023384 TDB period 1542.827868479992 4.22 7.6328e-06 2.09e-08 d yr n .2333377607151181 1.1544e-09 deg/d Q 2.711380447564552 8.9427e-09 au   Orbit Determination Parameters    # obs. used (total)      2266      data-arc span      32068 days (87.80 yr)      first obs. used      1933-01-29      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .41696      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 01:59:27   Additional Information  Earth MOID = 1.50259 au   Jupiter MOID = 2.45954 au   T_jup = 3.394  [ 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 12.4   n/a MPO439075   diameter diameter 13.328 km 0.178 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.120   0.017 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   1260 Walhalla (1933 BW)          Discovered 1933-Jan-29 by Reinmuth, K. at Heidelberg Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1933 BW = 1957 XD  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-21 06:15 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin