161P/Hartley-IRAS (Record n° 31949)
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 05 18h59 UT by Francois Kugel
(Copyright Francois Kugel)Magnitude (MPC m2) 13.2 Aperture radius for m2 29.9 " Magnitude band Vj r (dist/Sun) 1.462 AU d (dist/Earth) 0.510 AU Right ascension 338.35475 ° Declination -1.69999 ° ADES report
# version=2022
# observatory
! mpcCode A77
# submitter
! name F. Kugel
# observers
! name F.Kugel
# measurers
! name F. Kugel
# telescope
! design reflector
! aperture 0.03
! fRatio 5.0
! detector CMO
# software
! astrometry Tycho 13.7
! photometry Tycho 13.7
permID |provID |trkSub |mode|stn |obsTime |ra |dec |rmsRA|rmsDec|rmsFit|astCat |mag |rmsMag|band|photCat |photAp|logSNR|exp |notes|remarks
161P| | FD26060| CMO|A77 |2026-10-05T18:59:34Z |338.35475 |-1.69999 |0.55 |0.54 |0.78 | ATLAS2|13.1 |0.06 | Vj| ATLAS2|29.9 |1.31 | 490| K|
161P| | FD26060| CMO|A77 |2026-10-05T19:06:59Z |338.34162 |-1.69486 |0.52 |0.51 |0.73 | ATLAS2|13.3 |0.08 | Vj| ATLAS2|29.9 |1.25 | 490| K|
161P| | FD26060| CMO|A77 |2026-10-05T19:18:10Z |338.32070 |-1.68711 |0.51 |0.54 |0.74 | ATLAS2|13.2 |0.14 | Vj| ATLAS2|29.9 |1.33 | 480| K|
Instrumental configuration Config5 Instrument type Newton Instrument aperture (0=naked eye) 30 mm Instrument focale length 150 mm Instrument focale/diameter 5.0 Filter None Camera IMX662 Sensor CMOS Binning 2x2 Mount Altaz Autoguide No Picture exposure details 143x10s Observatory MPC code A77 Reference stars catalog (ast) ATLAS2 Reference stars catalog (phot) ATLAS2 Used softwares Tycho Resulting picture sampling (scale) 3.99 "/pix Observation submission date 2026 Oct 08 17h29m14s Observation modification date 2026 Oct 08 17h30m18s