Pipirimaについて
説明
Pipirima, Mu2 Scorpii, is a B-type subgiant of spectral class B2 IV about 474 light-years away, the southern companion of the naked-eye pair with Xamidimura. Pipirima shines at magnitude 3.57 and is roughly 9 solar masses. It is a young, hot main-sequence member of the Upper Centaurus-Lupus association. No eclipse variability has been detected in Pipirima itself — it is apparently a single B-type star.
観測のコツ
Pipirima is the fainter southern component of the naked-eye pair with Xamidimura, about 0.3 degrees apart. Binoculars clearly show them as an unmistakable bright double, with both components showing blue-white colors. Best observed from the southern hemisphere in May through September.
歴史
Pipirima takes its name from a Tupi legend of Brazilian indigenous astronomy — twin brothers named Pipirima who were placed in the sky as stars. The IAU adopted the name in 2017. Like its partner Xamidimura, Pipirima's name celebrates astronomical traditions outside the Greek-Arabic mainstream.
豆知識
The Mu1/Mu2 Sco optical pair is one of the best naked-eye demonstrations of the fact that bright "double stars" in the sky are often chance line-of-sight pairings rather than physical systems. The two stars differ by only about 20 light-years in distance, which at almost 500 light-years away is indistinguishable by eye.
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 | 容易 | 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。
