161P/Hartley-IRAS (Record n° 31950)
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 08 20h55 UT by Jean-Gabriel Bosch
(Copyright Jean-Gabriel Bosch)Magnitude (MPC m2) 14.7 Aperture radius for m2 7.2 " Magnitude band G r (dist/Sun) 1.442 AU d (dist/Earth) 0.529 AU Right ascension 330.57456 ° Declination +1.24655 ° 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| | ABC1861| CMO|Y87 |2026-10-08T20:55:14Z |330.57456 |+1.24655 |0.13 |0.16 |0.20 | Gaia2|14.7 |0.04 | G| Gaia2| 7.2 |1.95 | 555| K|
161P| | ABC1861| CMO|Y87 |2026-10-08T21:04:40Z |330.55875 |+1.25254 |0.12 |0.16 |0.20 | Gaia2|14.7 |0.03 | G| Gaia2| 7.2 |1.95 | 555| K|
161P| | ABC1861| CMO|Y87 |2026-10-08T21:13:59Z |330.54319 |+1.25844 |0.12 |0.15 |0.19 | Gaia2|14.7 |0.04 | G| Gaia2| 7.2 |1.94 | 540| 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 110x15s 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 1 Resulting picture sampling (scale) 1.6 "/pix Observation submission date 2026 Oct 09 06h05m33s Observation modification date 2026 Oct 09 06h07m41s