17P/Holmes (Record n° 22646)
Orbital period : 6.93 years
NASA/JPL elements
IAU/MPC elements
On 2020 Nov 17 00h45 UT by Jean-Louis Virlichie
(Copyright Jean-Louis Virlichie)Nuclear magnitude (m2) 17.1 m2 standard deviation 0.2 Aperture radius used for m2 5.6 " r (dist/Sun) 2.205 AU d (dist/Earth) 2.552 AU Right ascension 19 43 19.54 h m s Declination -24 31 41.1 ° ' " MPC report COD X03
CON Jean-Louis Virlichie [jl.virlichie@gmail.com]
OBS J. L. Virlichie, P. Traverse
MEA J. L. Virlichie
TEL 0.35-m f/4.7 Newtonian reflector + CCD
ACK MPCReport file updated 2020.11.17 19:02:45
AC2 jl.virlichie@gmail.com
NET Gaia DR2
0017P C2020 11 17.03102 19 43 19.54 -24 31 41.1 17.1 G X03
0017P C2020 11 17.04291 19 43 20.88 -24 31 32.9 17.0 G X03
0017P C2020 11 17.05477 19 43 22.26 -24 31 25.2 16.8 G X03
0017P C2020 11 17.06663 19 43 23.51 -24 31 16.6 17.4 G X03
Instrumental configuration Config1 Instrument ONTC 355 Instrument type Newton Instrument aperture (0=naked eye) 350 mm Instrument focale length 1645 mm Instrument focale/diameter 4.7 Filter(s) L Camera Moravian G3 KAF 16200 Sensor CCD Sensor size 27x21.6 mm2 Sensor pixels number 4500x3600 Sensor temperature -20 °C Binning 2x2 Mount SW EQ8 Motorization No Autoguide Yes Exposure details 8x90s Observatory MPC code X03 Location Poroto Chili Reference stars catalog Gaia DR2
Used softwares ASTROMETRICA Resulting picture sampling (scale) 1.4 "/pix Observation submission date 2020 Nov 17 21h56m18s Observation modification date 2020 Nov 17 22h00m11s