161P/Hartley-IRAS (Record n° 31930)
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 01 20h10 UT by Tiago Ferreira
(Copyright Tiago Ferreira)Magnitude (MPC m2) 14.9 Aperture radius for m2 8.1 " Magnitude band Vj r (dist/Sun) 1.489 AU d (dist/Earth) 0.504 AU Right ascension 349.24893 ° Declination -5.64586 ° ADES report
# version=2022
# observatory
! mpcCode R39
# submitter
! name T. Ferreira
# observers
! name Dobsonian Power
# measurers
! name Tiago Ferreira
# telescope
! design Reflector
! aperture 0.41
! fRatio 3.3
! detector CCD
# 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| | TR0000| CCD|R39 |2026-10-01T20:09:37Z |349.24893 |-5.64586 |0.28 |0.40 |0.49 | ATLAS2|14.9 |0.05 | Vj| ATLAS2| 8.1 |1.98 | 72| K|
161P| | TR0000| CCD|R39 |2026-10-01T20:13:04Z |349.24236 |-5.64392 |0.27 |0.40 |0.48 | ATLAS2|14.9 |0.05 | Vj| ATLAS2| 8.1 |1.91 | 72| K|
161P| | TR0000| CCD|R39 |2026-10-01T20:19:58Z |349.22868 |-5.63897 |0.22 |0.45 |0.50 | ATLAS2|14.9 |0.05 | Vj| ATLAS2| 8.1 |1.96 | 72| K|
Instrumental configuration Config1 Instrument type Newton Instrument aperture (0=naked eye) 410 mm Instrument focale length 1353 mm Instrument focale/diameter 3.3 Sensor CMOS Picture exposure details 1x8s Observatory MPC code R39 Reference stars catalog (ast) ATLAS2 Reference stars catalog (phot) ATLAS2 Resulting picture sampling (scale) 0.91 "/pix Observation submission date 2026 Oct 01 23h46m56s Observation modification date 2026 Oct 08 13h15m59s