17P/Holmes (Record n° 23750)
Orbital period : 6.93 years
NASA/JPL elements
IAU/MPC elements
On 2021 Aug 10 00h44 UT by Jean-Francois Soulier
(Copyright Jean-Francois Soulier)Nuclear magnitude (m2) 16.2 m2 standard deviation 0.1 Aperture radius used for m2 6 " r (dist/Sun) 2.447 AU d (dist/Earth) 2.701 AU Right ascension 04 39 20.66 h m s Declination +39 24 52.8 ° ' " MPC report COD L27
CON J.-F. Soulier [jean-francois.soulier2@wanadoo.fr]
OBS J.-F. Soulier
MEA J.-F. Soulier
TEL 0.25-m f/3.5 Newtonian reflector + CCD
ACK L27 2021.08.10 08:40:17
AC2 jean-francois.soulier2@wanadoo.fr
NET UCAC-4
0017P C2021 08 10.03069 04 39 20.66 +39 24 52.8 16.3 R L27
0017P C2021 08 10.04161 04 39 21.78 +39 24 56.9 16.2 R L27
0017P C2021 08 10.05290 04 39 22.97 +39 25 02.4 16.2 R L27
Instrument type Newton Instrument aperture (0=naked eye) 250 mm Instrument focale length 875 mm Instrument focale/diameter 3.5 Filter(s) None Camera ATIK 414-EX- Sensor CCD Sensor temperature -10 °C Binning 1x1 Mount PARAMOUNT-ME- Autoguide No Exposure details 60 x 30s Observatory MPC code L27 Location Dauban (04) Reference stars catalog UCAC-4
Used softwares ASTROMETRICA Resulting picture sampling (scale) 1.49 "/pix Observation submission date 2021 Aug 10 08h44m56s Observation modification date 2021 Aug 10 10h04m03s