+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   177P/Barnard Classification: Halley-type Comet* [NEO]          SPK-ID: 1000909 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2453849.5 (2006-Apr-24.0) TDB Reference: JPL 28 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .9544420406541483 3.4314e-09   a 24.30466900945265 2.2691e-07 au q 1.107271122647026 9.0436e-08 au i 31.21645855802596 1.224e-05 deg node 272.0677211295935 7.4188e-06 deg peri 60.45355087098523 1.7361e-05 deg M 358.9579497173977 1.1174e-07 deg tp 2453976.183241812853 (2006-Aug-28.68324181) 1.2172e-05 TDB period 43765.61075223311 119.82 0.00061291 1.678e-06 d yr n .00822563638008025 1.1519e-10 deg/d Q 47.50206689625827 4.4349e-07 au   Orbit Determination Parameters    # obs. used (total)      1702      data-arc span      42903 days (117.46 yr)      first obs. used      1889-06-24      last obs. used      2006-12-11      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .82587      source      ORB      producer      Otto Matic      solution date      2020-Jun-02 00:45:32   Additional Information  Earth MOID = .310191 au   Jupiter MOID = .349611 au   T_jup = 1.317  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes comet total magnitude M1 15.7   1. 28 2 parameter fit from 209 observations, autocmod 2.8 comet total magnitude slope K1 13.   n/a 28 autocmod 2.8 comet nuclear magnitude M2 18.3   0.8 28 from 1361 observations, autocmod 2.8 comet nuclear magnitude slope K2 5.   n/a 28 autocmod 2.8 comet nuclear phase coefficient PC 0.03   n/a 28 autocmod 2.8 [ show close-approach data ] Alternate Designations  Perihelion  Year (est.)  New-Style  Desig Roman  Numeral  Year/  Letter   2006.7   177P/2006 M3         1886.8   177P/1889 M1        [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ] 2021-Mar-07 10:02 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin