NASA/JPL elements
IAU/MPC elements
On 2020 Jan 21 22h05 UT by Nicolas Biver
(Copyright Nicolas Biver)
| Coma Total magnitude (m1) | 9.7 | Aperture radius used for m1 | 2.5 ' | Nuclear magnitude (m2) | 13.0 | Aperture radius used for m2 | 6 " | Coma diameter | 5 ' | Coma condensation degree (DC) | 5 | Tail length | 0.15 ° | Tail position angle (PA) | 145 ° | r (dist/Sun) | 2.126 AU | d (dist/Earth) | 1.577 AU | Right ascension | 02 31 35 h m s | Declination | +57 18 00 ° ' " | Instrumental configuration | Config1 | Instrument | Dobson T407mm F/D 4.3 | Instrument type | Newton | Instrument aperture (0=naked eye) | 407 mm | Instrument focale length | 1750 mm | Instrument focale/diameter | 4.29 | Filter(s) | None | Camera | Sony alpha 7s | Sensor | DC | Sensor size | 36x24 mm2 | Sensor pixels number | 4240x2832 | Sensor temperature | 0 °C | Binning | 2x2 | Mount | Dobson sur Table equatoriale JMI | Motorization | Yes | Autoguide | No | Exposure total time | 114 s | Exposure details | 4+55x2s | Sky transparency (naked eye max mag) | 5.5 | Seeing | 3 | Moon phase | 140 ° | Air mass | 1.2 | Location | Boulonville (28) | Reference stars catalog | Tycho-2 | Used softwares | IRIS | Resulting picture sampling (scale) | 2 "/pix | Image processing | division flat, alignement, somme, retrait gradient | Remarks or comments | coma C2 de 5.2', mR=10.3, mV=9.5, mB=9.7 (couches RVB) Catalogue de référence = APASS | Observation submission date | 2020 Jan 26 18h29m57s |
(Record n° 21528)