161P/Hartley-IRAS (Record n° 31941)
Perihelion distance : 1.27 AU
Inclination to ecliptic : 96 °
Orbital period : 21.46 years
Eccentricity : 0.84
NASA/JPL elements
IAU/MPC elements
On 2026 Oct 04 19h34 UT by Nicolas Delaunoy
(Copyright Nicolas Delaunoy)Magnitude (MPC m2) 14.8 Aperture radius for m2 6.1 " Magnitude band V r (dist/Sun) 1.468 AU d (dist/Earth) 0.506 AU Right ascension 340.9726250 ° Declination -2.6711943 ° Instrument UNISTELLAR eQuinox2 Instrument type Newton Instrument aperture (0=naked eye) 115 mm Instrument focale length 452 mm Filter None Camera IMX347 Sensor CMOS Sensor size 7.1x5.3 mm2 Sensor pixels number 2088x1536 Binning 1x1 Mount ALT-AZ Motorization Yes Autoguide No Exposure total time 1056 s Picture exposure details 264x4s Sky transparency (naked eye max mag) 4 Seeing 3 Moon phase 106 ° Moon elongation 136 ° Location Yerres, 91330, France Reference stars catalog (phot) UCAC4 Used softwares Tycho tracker V13.6 (master darks avec Siril) Resulting picture sampling (scale) 1.32 "/pix Observation submission date 2026 Oct 06 19h26m52s Observation modification date 2026 Oct 06 19h34m21s