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COBS Comet observers database
Joj po daljšem času, spet uklopitev med omrežje. Vesolje pa ne počiva tako kot vedno sveže in zanimive informacije tokrat se nam utegne posrečiti opazovanje kometa.
C/2009 R1 McNaught je opazen nizko ob jutranjem obzorju potuje iz smeri Pegaza, pod zvezdo Mirach proti Perzeju to je le Vzhodni del naba tako da preži "nevarnost opazovanja" zato previdno WARNING SUN!!! Sončni vzhod...
Tako kot vsi kometi, je McNaught je ledeni ostanek formacije nastanka sončnega sistema. Verjetno izvira iz Oortov oblaka, sferične kongregacije morda trilijona kometov in se lahko raztezajo četrt poti do najbližje zvezde.Ta Komet McNaught zdi se, da je v odprti hiperbolični tirnici, kar pomeni, da je to njegov prvi in verjetno zadnji obisk v notranjost sončnega sistema.
Updated Comet visibly
od junija 1-7,lebdi pod namišljeno črto, ki povezuje Mirach in Almaak. Od junija 13-15, se nahaja nekaj stopinj pod Mirphak: to je verjetno najboljši čas, za opazovanje, saj Luna ne bo okrog razsvetljevala nebo. V daljnogled ali majhen teleskop, bo komet zgledal fuzzy ter podaljšan in povsem v nasprotju z ostrimi točkami podobnih zvezd.
Kot večina kometov, bo McNaught svetlejši, kot se bo prebližal soncu proti koncu meseca. To pa pomeni, da ga je težje videti. Po 15. junija se zdi, da se spusti približno eno stopinjo nižje na nebu vsak dan in s tem se pribljiža svetli Capelli ob sončnem vzhodu. Ob koncu meseca, se komet zasuka za sonce, nato pa se znova pojavi na južnem nebu preden izgine iz pogleda.
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C/2009 R1 McNaught - Naked Eye Comet for June?
UPDATE 8.Junij 2010
Now is the time to be hunting down comet C/2009 R1 McNaught which is fast becoming a fairly spectacular object for observers at mid northern latitudes. Visual observers have already placed the comet at mag +5.1 (Peter Horalex) which means this is technically a naked eye object!, and a very easy catch in binoculars and telescopes. The comet has a large green coma (head) with bright central condensation and a ghostly ion tail (sometimes called a gas or plasma tail) pointing directly away from the Sun for more than 1 million km through the solar system. The coma should get brighter, and the tail longer, as it makes its closest approach to Earth on June 15th (1.13 AU) before making it's closest approach to the Sun on July 2nd at 0.4 AU. The comet will be at it's best in late June when it could peak at mag +2.0, or in other words as bright as Polaris, the North Star. This peak magnitude is highly speculative at the moment because comets are notoriously unpredictable, especially 'fresh' Oort cloud visitors so expect a true visual mag (m1) between +4.0 and +2.0, however if there's an outburst then we could be in for a real treat!
Between June 9th and 10th McNaught passes close to the open cluster M34, then continues moving to the east with a gradually diminishing elongation which means it's getting closer to the Sun and lurking within a very intense twilight background. By mid June it passes through Perseus below Mirfak and near the end of the month it can be found within Auriga making a close pass by Capella on the 21st-22nd before we loose it within the Sun's glare in Gemini by early July. There's nothing better than a bright comet on a muggy Summer's night so make a point of observing this transient visitor before it retreats back into the cold depths of the solar system when we will never see it again. Comet's are special, they look incredible, pack strong emotional connection with historical observers, and may hold secrets to how the Earth formed and the humans on it. As always I will be keeping you updated on the latest events when they happen. For new observers here's a page I done years ago on observing comets.
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Update: Now mag +6.7
Will we get a naked eye comet this June?, at the moment this certainly looks like a real possibility. Comet C/2009 R1 McNaught has now appeared in the morning sky and can currently be found in Pegasus (at the time of writing) within the bright glow of morning twilight low in the NE. The comet will pick up in both speed and brightness as it makes a beeline for the Sun with perihelion taking place during July when R1 will be 0.4 AU from Sun, however this will occur on the opposite side of the Sun as seen from Earth so the chances of a truly bright or 'great comet' are almost zero unless a violent eruption and subsequent outburst happens, which most certainly cannot be ruled out. McNaught is already two magnitudes brighter than expected, in fact, Con Stoitsis from Australia estimated its brightness at mag +7.8 on May 18th, and considering the rapid rate of brightening, it could reach mag +7.0 by the end of May. If the current brightness trend holds for the remainder of the apparition then R1 could reach mag +3.0 with more optimistic sources giving a value of +2.0 which is similar in brightness to 'Polaris' the 'Pole Star'. However one must keep in mind that this maximum magnitude prediction peaks during July when the comet will be at a very small elongation from the Sun and unlikely to be visible from the ground although a nice show within SOHO's LASCO C3 camera is likely.
The period of interest for ground based visual observers is from May to late June when the comet should be a very easy target for small binoculars, and possibly even a faint naked eye object in the N sky. If R1 was placed higher in the sky during a darker time of year then it would be an exciting object easily visible without optical aid. Our current apparition is not a good one with several factors against us, the main two being the comet's location low in the sky where it will be fighting with atmospheric extinction for attention, add in the intense twilight glow which is visible all night long for observers at mid northern latitudes and you have a challenge. This comet will be low in the twilight glow as it moves across the NE to N in a sky which never truly gets dark. The good news is that the comet should be visible all night long giving observers plenty of opportunity to hunt it down on those wonderful mild late Spring nights. On a positive note McNaught does pass through several distinctive constellations which have an abundance of bright stars which will greatly aid with star hopping techniques for beginners.
Where to find it?, from late May onwards R1 will be moving to the NE at 1.5 degrees (3 full Moon diameters) per day so it really will be moving swiftly among the background stars, new observers must keep this in mind when using star charts and focus their hunting ground on the period at least 24 hours ahead of the current day because these kind of comets tend to be further ahead than one might think, this is worth taking note of if you are new to comet observing. By late May R1 moves from SE Pegasus into Pisces, between month's end and early June it passes between southern Andromeda and Triangulum where it can be found above M33, it's worth noting that an astrophotographer with a DSLR could capture M33, R1, and M31 in a single frame at this time. During mid June R1 will pass very close to M34 in Perseus the treks south of the naked eye star Alpha Persei (Mirfak). In late June McNaught will pass extremely close to the naked eye star Capella in Auriga before disappearing into the solar glare during July within Gemini when it can be found between Castor and Pollux.
Comet McNaught & Rare Noctilucent Cloud Photo Opportunity!
Before the excitement of a bright comet subdues our sense of reality we must take into consideration one important factor, R1 McNaught is what's known as a 'New', 'Fresh', or 'Oort Cloud Comet'. This means than R1 is making it's very first trip into the inner solar system after spending much of it's life locked in a frigid slow moving gravitational dance along with millions of other comet nuclei, for some reason, such as the gravitational nudge from a passing star, this comet was sent from it's home on a long journey towards the Sun where it will finally be seen by human eyes during 2010, after which it will never be seen again during our lifetimes, this is a long period comet moving in a Hyperbolic orbit, these guys have the ability to produce surprises which can either thrill or disappoint Earth-bound observers.
If the nucleus is very volatile then R1 could experience a dramatic outburst causing it to flare in brightness becoming an exceptional naked eye object although comet experts are skeptical that this will happen, on the other hand the current increase in brightness being reported could shut down and turn the June event into a 'damp squib' as many observers like to call it. All in all it does look like we will be treated to a binocular, or possible naked eye comet next month. Considering the closing perihelion distance there's no reason to doubt that the comet could sport a nice gas or dust tail, I certainly hope it's the latter. However the comet is only half of the show, the other half are the NLCs.
What I do find exciting about the comet situation during June is the potential for a stunning rare visual and photo opportunity with a bright comet and Noctilucent Clouds (NLCs) visible at the exact same time!. Never to my knowledge has such a double event happened before with these two transient subjects, so I should reiterate that this will be an extremely rare event indeed, and something which I've never observed before in my life. Look again at McNaught's path during June, it passes through Perseus and Auriga, these are the two primary constellations in which NLCs can be found every year, check my NLC galleries and see for yourself where these constellations are in relation to NLCs in the image. In summary, comet C/2009 R1 McNaught might be a naked eye object (perhaps subtle) in close proximity too, or within any bright NLC displays which appear during this period.
Imagine the view through binoculars of a fuzzy comet and bright false nucleus with a tail unfurled across the FOV while at the same time be treating to the stunning sight of electric blue-coloured bands and waves of NLC actually moving through the field and over the comet in real time - this would be a truly awesome sight to witness and an amazing imaging chance for those with fast zoom lenses. The dust particles which are the source of NLCs are believed, by many, to be particles from micro meteor activity entering the Earth's atmosphere where it gets incased in ice within the upper Mesosphere, these meteoritic particles originally came from ancient comets - so to actually see this connection visually at the same time is really exceptional indeed. Let's hope for a good show from both McNaught and the NLCs and for memories which will be treasured forever. I will be updating this section with the latest information closer to the time - thanks for reading.
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