当前可见度
高度角
74.0°
方位角
191.3°
天体详情
| Group | 属性 | 数值 |
|---|
Rise/Set Times
升起时间
04:11
中天时间
11:39
落下时间
19:06
Observing Recommendations
Observing Tips:
- Visible to the naked eye under dark skies
- Use low to moderate magnification
- Look for color differences among stars
- Great viewing conditions - fine detail should be visible
关于深空数据
Data Sources
Deep sky object data is compiled from authoritative astronomical catalogs including NGC (New General Catalogue), IC (Index Catalogue), Messier, and Caldwell. Primary source: OpenNGC.
Coordinate Systems
Right Ascension (RA): Celestial longitude measured in hours, minutes, and seconds (0h to 24h).
Declination (Dec): Celestial latitude measured in degrees, arcminutes, and arcseconds (-90 to +90 degrees).
星等标度
The astronomical magnitude scale is logarithmic. Lower values = brighter objects. The formula relating magnitude difference to brightness ratio:
\[m_1 - m_2 = -2.5 \times \log_{10}\left(\frac{F_1}{F_2}\right)\]
where m is magnitude and F is flux.
Observing Recommendations
Recommendations are calculated based on:
- 高度角: Objects above 30 degrees altitude are easier to observe
- 星等: Brighter objects (lower magnitude) are easier to see
- 月相: Dark skies (new moon) improve visibility of faint objects
Rise and Set Times
Calculated using Skyfield astronomical library with observer's location and date. Times shown in local timezone. Objects are considered visible when altitude is above 0 degrees.
Best Viewing Time
Determined by finding when the object reaches maximum altitude (culmination) during nighttime hours. Calculated as:
\[t_{\text{best}} = \arg\max_{t \in \text{night}} h(t)\]
where h(t) is altitude as a function of time.