| IC5148 / Planetary nebula, type IV |
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| R.A. | 21h 59m 35.2s (2000.0) |
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| Dec. | -39°23' 09" (2000.0) |
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| Apparent Size | 2.2' |
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| Real Size | 4.5 light yrs. |
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| Magnitude | 12.9 |
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| Distance | 3000 light yrs. |
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| Other IDs | IC 5150, ESO 344-5
PK 2-52.1 |
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IC 5148 is a planetary nebula with an apparent diameter of just over 2 arc minutes, visible in the northern part of the constellation Grus.
It is located 2.3 degrees southeast of the northernmost δ Gruis, and clearly displays a red ring-like structure.
The central star is a 16.5 magnitude white dwarf, which can be seen in this image. Due to its shape, it has the nickname "Spare-Tire Nebula".
The expansion speed of this nebula has been measured at 50 km/s, making it one of the fastest expanding planetary nebulae in the sky.
In Japan, it is difficult to observe this object under favorable conditions due to its low altitude at culmination.
The distance from the solar system is approximately 3,000 light-years, with a real diameter of 4.5 light-years.
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