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3361 Orpheus (1982 HR) Classification: Apollo NEO, PHA ] SPK-ID: 2003361
[ show orbit diagram ]
Orbital Elements at Epoch 2455844.5 (2011-Oct-10.0) TDB Reference: JPL 132 (heliocentric ecliptic J2000)
Element Value Uncertainty (1-sigma) Units e .3227518287938224 3.7127e-08 a 1.209662179045708 1.1101e-09 au q .8192414985359853 4.5113e-08 au i 2.685064208145241 4.0392e-06 deg node 189.5305495453812 4.38e-05 deg peri 301.6952073346065 4.4104e-05 deg M 102.8299018073053 7.9289e-06 deg t p 2455705.692957596580 1.0813e-05 TDB period 485.9533500175061 6.6891e-07 d n .7408118495057834 1.0197e-09 deg/d Q 1.60008285955543 1.4683e-09 au
Additional Model Parameters
Parameter Value Uncertainty (1-sigma) A2 [EST]2.095597614176399E-14 2.915E-15 ALN [SET]1. n/a NK [SET]0. n/a NM [SET]2. n/a R0 [SET]1. n/a
Orbit Determination Parameters Additional Information
[ show covariance matrix ] Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 19.03 n/a PDS3 (MPC 17268)
diameter diameter 0.3 km n/a Hazards due to Comets and Asteroids (1994), Ed. T. Gehrels, pp.540-543 based on assumed light albedo (0.40)
rotation period rot_per 3.532 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
geometric albedo albedo 0.357 0.135 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2011ApJ...743..156M)
B-V BV 1.022 0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=24.51 deg.
U-B UB 0.503 0.039 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=24.51 deg.
3361 Orpheus (1982 HR) Discovered 1982-Apr-24 by Torres, C. at Cerro El Roble Reference: DISCOVERY.DBLast Updated: 2003-08-29
[ show close-approach data ]
