161P/Hartley-IRAS (Record n° 31993)
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 18 19h30 UT by Jean-Gabriel Bosch
(Copyright Jean-Gabriel Bosch)Magnitude (MPC m2) 15 Aperture radius for m2 7.2 " Magnitude band G r (dist/Sun) 1.382 AU d (dist/Earth) 0.661 AU Right ascension 311.77725 ° Declination +8.50862 ° ADES report
# version=2022
# observatory
! mpcCode Y87
# submitter
! name J.-G. Bosch
# observers
! name J.-G. Bosch
# measurers
! name J.-G. Bosch
# telescope
! design reflector
! aperture 0.25
! fRatio 4.75
! detector CMO
# software
! astrometry Tycho 13.6
! photometry Tycho 13.6
permID |provID |trkSub |mode|stn |obsTime |ra |dec |rmsRA|rmsDec|rmsFit|astCat |mag |rmsMag|band|photCat |photAp|logSNR|exp |notes|remarks
161P| | ABC1954| CMO|Y87 |2026-10-18T19:30:34Z |311.77725 |+8.50862 |0.14 |0.14 |0.20 | Gaia2|15.0 |0.05 | G| Gaia2| 7.2 |1.97 | 550| K|
161P| | ABC1954| CMO|Y87 |2026-10-18T19:40:06Z |311.76777 |+8.51227 |0.20 |0.16 |0.25 | Gaia2|15.0 |0.05 | G| Gaia2| 7.2 |1.96 | 550| K|
161P| | ABC1954| CMO|Y87 |2026-10-18T19:49:14Z |311.75866 |+8.51584 |0.23 |0.29 |0.37 | Gaia2|15.0 |0.11 | G| Gaia2| 7.2 |1.85 | 525| K|
Instrument type Newton Instrument aperture (0=naked eye) 250 mm Instrument focale length 1187.5 mm Instrument focale/diameter 4.75 Camera Asi 294MM Sensor CMOS Sensor temperature -5 °C Binning 4x4 Mount EQ6-R pro Picture exposure details 65x25s Observatory MPC code Y87 Location Trevinca skies-Amalthea Reference stars catalog (ast) Gaia2 Reference stars catalog (phot) Gaia2 Used softwares Tycho Tracker Image resize factor 2 Resulting picture sampling (scale) 1.6 "/pix Observation submission date 2026 Oct 19 05h41m45s Observation modification date 2026 Oct 19 05h52m16s