NASA/JPL elements
IAU/MPC elements
On 2018 Jul 19 00h43 UT by Nicolas Biver
(Copyright Nicolas Biver)
| Coma Total magnitude (m1) | 7.8 | Aperture radius used for m1 | 3.0 ' | Nuclear magnitude (m2) | 11.2 | Aperture radius used for m2 | 6.0 " | Coma diameter | 6.0 ' | Coma condensation degree (DC) | 6 | Tail length | 0.33 ° | Tail position angle (PA) | 300 ° | r (dist/Sun) | 0.853 AU | d (dist/Earth) | 1.101 AU | Right ascension | 04 58 28.4 h m s | Declination | +55 32 15 ° ' " | 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 | Binning | 2x2 | Mount | Dosbson sur table equatoriale JMI | Motorization | Yes | Autoguide | No | Exposure total time | 98 s | Exposure details | 41*2+4*4sec | Sky transparency (naked eye max mag) | 6 | Seeing | 4 | Moon phase | 100 ° | Moon elongation | 110 ° | Air mass | 2.5 | Location | Boulonville (28) | Reference stars catalog | Tycho-2 | Used softwares | IRIS | Resulting picture sampling (scale) | 2.0 "/pix | Image processing | alignement, somme, retrait gradient alignement 2 séries de 40 et 48s sur la comète - turbulence importante | Remarks or comments | magnitudes totales (pour dia 5') R/G/B = 9.7 / 7.4 / 7.6 (RA/Dec corrigés le 23/07) | Observation submission date | 2018 Jul 19 15h58m01s | Observation modification date | 2018 Jul 23 11h55m22s |
(Record n° 19355)