Millijanskys to AB magnitude
Type a value in mJy 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.
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 mJy 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: 0.000363 mJy = 25.0003 AB mag.
Every unit
That flux density in every unit
Tables
mJy to AB mag conversion table
| mJy | AB mag |
|---|---|
| 3.63×10⁻⁶ mJy | 30.0003 AB mag |
| 2.29×10⁻⁵ mJy | 28.0005 AB mag |
| 0.000363 mJy | 25.0003 AB mag |
| 0.00363 mJy | 22.5003 AB mag |
| 0.0363 mJy | 20.0003 AB mag |
| 1 mJy | 16.4001 AB mag |
| 3.63 mJy | 15.0003 AB mag |
| 363 mJy | 10.0003 AB mag |
| 36,300 mJy | 5.0003 AB mag |
| 3,630,000 mJy | 0.00029906 AB mag |
| 363,000,000 mJy | -4.9997 AB mag |
AB mag to mJy conversion table
| AB mag | mJy |
|---|---|
| -5 AB mag | 363,100,000 mJy |
| 0 AB mag | 3,631,000 mJy |
| 5 AB mag | 36,310 mJy |
| 10 AB mag | 363.1 mJy |
| 15 AB mag | 3.631 mJy |
| 16.4 AB mag | 1.00006 mJy |
| 20 AB mag | 0.03631 mJy |
| 22.5 AB mag | 0.003631 mJy |
| 25 AB mag | 0.0003631 mJy |
| 28 AB mag | 2.291×10⁻⁵ mJy |
| 30 AB mag | 3.631×10⁻⁶ mJy |
Quick answers
Quick answers
- How many AB mag is 1 mJy?
- 1 mJy is 16.4001 AB mag.
- How many AB mag is 10 mJy?
- 10 mJy is 13.9001 AB mag.
- How many AB mag is 0.000363 mJy?
- 0.000363 mJy is 25.0003 AB mag.
The units
About these units
Millijanskys (mJy)
Thousandths of a jansky.
AB magnitude (AB mag)
Astronomical magnitude per unit frequency: 0 is 3,631 Jy.
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