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Iota (ι) Cancri
Contrast Multiple Star
| Right Ascension | 8h 46m 41s | Best Seen | 1/15 - 5/15 |
| Declination | 28° 45' 36" | Combined Magnitude | 3.93 |
| Apparent Separation | 30.4" | Constellation | Cancer |
Actual |
Compared to Sun |
|
| Distance | 298 / 188 ly | -- |
| Separation | -- | -- |
| Orbital Period | -- | -- |
| Actual Brightness | -- | 161 / 6.1 |
| Magnitude | 4.03 / 6.58 | |
| Mass | -- | -- |
| Surface Gravity | -- | -- |
| Surface Composition (by mass) | 74% hydrogen 24% helium 2% everything else |
same |
| Spectral Type | G8 Iab / A3V | G2 V |
| Density (gram/cubic cm) | -- | -- |
What To Look For Through The Telescope
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Recommended eyepiece: 24mm or 40 mm.
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When people look through the telescope they should see two stars next to each other. The brighter star should appear yellow and the dimmer star blue.
Iota Cancri Information:
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The stars are far apart from each other, some 2800 times the distance from the Earth to the Sun.
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A planet near the brighter star would see the fainter star shining as bright as the full Moon does in our sky. A planet near the fainter star would see the brighter star as 10 times as bright as the full Moon.
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With such a large separation, the stars may get ripped away from each other by chance gravitational encounters with passing stars.
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References
| Item | Updated | Notes |
| Coordinates | 2002-07-24 | SIMBAD |
| Combined Magnitude | 2002-07-24 | with Scott’s The Flamsteed Collection |
| Apparent Separation | 2002-07-24 | http://www.astronomical.org/constellations/cnc.html |
| Distance | 2002-07-24 | SIMBAD |
| Actual Brightness | -- | |
| Magnitude | -- | |
| Mass | -- | |
| Surface Gravity | -- | |
| Surface Composition | 2003-01-06 | OK for all stars |
| Spectral Type | 2002-07-24 | SIMBAD |
| Density | -- | |
| Other Information | -- |