Microjanskys to AB magnitude
Type a value in µJy to get it in AB mag instantly.
25AB mag
That's 100× as bright as the faintest galaxies in Hubble’s deep fields, while the faintest star the eye can see is 39,821,684× brighter.
Convert the other way: AB mag to µJy
What it means
How bright is that source?
AB magnitudes are defined per unit frequency. Vega-system magnitudes differ by a band-dependent offset; references are rough visual values.
The math
How to convert µJy to AB mag
AB = −2.5 log₁₀(F ÷ 3,631 Jy); F = 3,631 Jy × 10^(−0.4 AB). 1 Jy = 10⁻²⁶ W m⁻² Hz⁻¹.
Example: 0.363 µJy = 25.0003 AB mag.
Every unit
That flux density in every unit
Tables
µJy to AB mag conversion table
| µJy | AB mag |
|---|---|
| 0.00363 µJy | 30.0003 AB mag |
| 0.0229 µJy | 28.0005 AB mag |
| 0.363 µJy | 25.0003 AB mag |
| 3.63 µJy | 22.5003 AB mag |
| 36.3 µJy | 20.0003 AB mag |
| 1,000 µJy | 16.4001 AB mag |
| 3,630 µJy | 15.0003 AB mag |
| 363,000 µJy | 10.0003 AB mag |
| 36,300,000 µJy | 5.0003 AB mag |
| 3.63×10⁹ µJy | 0.00029906 AB mag |
| 3.63×10¹¹ µJy | -4.9997 AB mag |
AB mag to µJy conversion table
| AB mag | µJy |
|---|---|
| -5 AB mag | 3.631×10¹¹ µJy |
| 0 AB mag | 3.631×10⁹ µJy |
| 5 AB mag | 36,310,000 µJy |
| 10 AB mag | 363,100 µJy |
| 15 AB mag | 3,631 µJy |
| 16.4 AB mag | 1,000.06 µJy |
| 20 AB mag | 36.31 µJy |
| 22.5 AB mag | 3.631 µJy |
| 25 AB mag | 0.3631 µJy |
| 28 AB mag | 0.0229101 µJy |
| 30 AB mag | 0.003631 µJy |
Quick answers
Quick answers
- How many AB mag is 1 µJy?
- 1 µJy is 23.9001 AB mag.
- How many AB mag is 10 µJy?
- 10 µJy is 21.4001 AB mag.
- How many AB mag is 0.363 µJy?
- 0.363 µJy is 25.0003 AB mag.
The units
About these units
Microjanskys (µJy)
Millionths of a jansky.
AB magnitude (AB mag)
Astronomical magnitude per unit frequency: 0 is 3,631 Jy.
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