Praecipuaについて
説明
Praecipua, 46 Leonis Minoris, is the brightest star in the faint constellation Leo Minor at magnitude 3.83. It is a K-type subgiant of spectral class K0+ III-IV lying 95 light-years away, with a mass of 1.7 Suns and a radius of about 8 Suns. Despite being the constellation's alpha star by brightness, 46 LMi received a Flamsteed number rather than a Greek letter due to Bayer's oversight when the constellation was drawn up.
観測のコツ
Praecipua is the only truly bright star in Leo Minor, a small triangular constellation wedged between Leo and Ursa Major. Find Leo Minor by looking for a small kite-shaped asterism north of Leo's main outline. Praecipua is the brightest point in that kite. Best observed February through May.
歴史
The name Praecipua is Latin for "chief" or "principal," reflecting the star's role as the brightest in its constellation. The name was formally adopted by the IAU in 2017. Leo Minor was invented by Johannes Hevelius in 1687, and Praecipua has been its principal star ever since.
豆知識
Praecipua's history is a celestial naming curiosity: when Francis Baily published his updated star catalog in the early 19th century, he accidentally skipped assigning Alpha to the brightest star in Leo Minor, giving only a Beta to the next brightest — a rare omission that leaves Leo Minor as one of the few constellations in the modern sky without an alpha. Praecipua remains Leo Minor's most prominent star and a reliable pointer toward the faint surrounding galaxies.
観測
1物理的性質
3見つけやすさ
| 機材 | ボートル3 | ボートル4 | ボートル5 |
|---|---|---|---|
| 肉眼 肉眼 | 容易 | 普通+ | 普通+ |
| 50mmファインダー 50mmファインダー | 容易 | 容易 | 容易 |
| 150mm望遠鏡 150mm望遠鏡 | 容易 | 容易 | 容易 |
ボートル3＝田舎 · 4＝郊外 · 5＝住宅地
5サーベイ画像
サーベイ画像を読み込み中…
探究
7
サイズ比較
8
恒星を比較
9
スペクトル分類
11
恒星の進化
12
黒体放射スペクトル
13
恒星吸収スペクトル
スペクトル型に基づくシミュレーション吸収スペクトル。線にマウスを合わせると元素を識別できます。
14
恒星核融合
発見
15恒星メモ
16
光の旅タイムマシン
17
相対論的旅行
近くの天体
数度以内にある他の対象 — 望遠鏡を少し動かして探索を続けましょう。
可視性スコアは150 mmニュートン・ボートル4を前提としています。
