M13 - Globular Cluster - Skylook.org

M13

Hercules Globular Cluster

Aglomerado globular Hercules Magnitude 5.8

Visibilidade atual

Altitude

-13.7°

Azimute

1.1°

Below horizon - not visible
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Detalhes do objeto

Propriedade Valor

Rise/Set Times

Hora de nascimento

15:58

Hora de trânsito

00:31

Hora de ocaso

09:03

Observing Recommendations

Equipment Needed:
Difficulty: Moderate
Magnification: Moderate to High (100-200x)

Observing Tips:

  • Binoculars recommended for best view
  • Use moderate to high magnification to resolve stars
  • Look for central concentration
  • Wait for better sky conditions or higher altitude

Sobre dados do céu profundo

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).

Escala de magnitude

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:

  • Altitude: Objects above 30 degrees altitude are easier to observe
  • Magnitude: Brighter objects (lower magnitude) are easier to see
  • Fase da Lua: 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.