M61 (the heavenly bodies)
| M61 Messier 61 | |
|---|---|
 | |
| Eddy Milky Way M61 | |
| Temporary mark, another name | NGC 4303 [1] |
| Constellation | Virgo |
| Apparent magnitude (V) | 9.65[1] |
| Apparent diameter | 6' × 5.5'[2] |
| Classification | Eddy Milky Way (SAB(rs)bc)[1], Seyfert galaxy [1] |
| Discovery | |
| Discovery day | May 5, 1779 [3] |
| Detector | Barnabas's cage older brother[2] |
| Discovery method | Observation with the telescope |
| Position Epoch: J2000.0[1] | |
| Right ascension (RA,α) | 12h 21m 54.950s [1] |
| Declination (Dec,δ) | + 04° 28′ 24.92″[1] |
| Red shift | 0.00524[1] |
| Radial velocity (Rv) | 1,566km/s [1] |
| Distance | 60 million light-year [2] |
 | |
| Position of M61 | |
| Physical property | |
| Diameter | 100,000 light-year |
| ■Project ■ Template | |
Coordinate: 
+04 degree 28'24.92"M61 (NGC 4303) is the eddy Milky Way of Virgo for 21m 54.950s for 12h.
Table of contents
Summary
I belong to Virgo galaxy cluster and am located for the south loser [2]. I understand the structure of the arm well in the face on Milky Way which turns an axis to our Milky Way. That scales are almost at the same level as our galaxy [2].
It is big one in Virgo galaxy cluster, but there is the report that I saw with a telescope of last-minute 5cm. If a condition is good with the telescope of diameter 10cm, I see a diffuse part surrounding central part and it. The triangular spot that was absentminded in three places of outside is created by the sketching of mullahs. It is thought that this is an arm. It shows the light and shade of the arm at diameter 20cm, but does not become clear. Understand the light and shade of the arm at diameter 30cm, too, and is splendid; look.
At the end of 2015, the appearance of seven supernovas most for SN 1,926A, SN 1961I, SN 1964F, SN 1999gn, SN 2006ov, SN 2008in, SN 2014dt and heavenly bodies listed in the Messier Catalogue is observed. Of these, person of amateur astronomy Koichi Itagaki of Japan discovers SN 2006ov, SN 2008in, SN 2014dt [4].
History of observation
A Barnabas's cage older brother () discovered it during the observation of the comet on May 5, 1779 [2]. The cage older brother leaves a record saying "it is very pale and looks just like the nucleus of the comet" [3]. Charles Messier observed it on the same day, but Messier was misled into thinking that it was a comet at first [2]. Messier noticed it not being a comet on May 11 six days later [2] and recorded it saying "it is hard to distinguish it because a nebula was extremely dim" [3]. I discover it during も comet search. William Henry Smith said, "a big pale nebula was extremely a faint gleam, but I was very amazed to learn that Messier identified it with 3.5 feet of telescopes and saw that I did even excitement, and it was seen that the center shined when a condition was good in my machinery and tools, and there were two nuclei with the telescope of William Hershel, but four faint gleams star follows in 90 "at the interval" [3]. Lord loss "there are two nuclei the center is bright swirl other nebulas said with north follower in 10'".
Source
- ^ a b c d e f g h i "SIMBAD Astronomical Database". Results for NAME M61. March 21, 2016 reading.
- ^ a b c d e f g h Hartmut Frommert, Christine Kronberg (December 9, 2014). "Messier Object 61". SEDS. March 21, 2016 reading.
- ^ a b c d Hartmut Frommert, Christine Kronberg (February 19, 2005). "Messier 61 Observations and Descriptions". SEDS. March 21, 2016 reading.
- ^ "list of supernovas which a Japanese discovered". National Astronomical Observatory. March 21, 2016 reading.
References
- Shigeru Nakano "observation 恒星社厚生閣 of the nebula star cluster", 1978. ISBN 978-4,769,900,559.
- Person from Hideo Asada "nebula star cluster watching" ground book building, February, 1996. ISBN 978-4,805,205,013.
- It is Newton press 〈 Newton separate volume 〉, January, 2007 Junichi Watanabe from "the M1 which glitters all in - night sky of heavenly bodies listed in the Messier Catalogue to M110". ISBN 978-4,315,517,910.
This article is taken from the Japanese Wikipedia M61 (the heavenly bodies)
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