| Identification Data |
| Common Name | |
| Constellation | Leo |
| Star Name | 30eta Leo |
| Skymap Number | 10070066 |
| Henry Draper (HD) Number | 87737 |
| Harvard Revised (HR) Number | 3975 |
| SAO Number | 98955 |
| Durchmusterung (DM) Number | BD+17 2171 |
Washington Double Stars (WDS) Number
| 10073+1646
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 127121 |
| Right Ascension (RA) J2000 | 10h 7m 19.952s |
| Declination (Dec) J2000 | +16° 45' 45.592" |
| Position Uncertainty | 0.0089s |
| Proper Motion in RA (J2000)/cos(Dec) | -0.00014 |
| Proper Motion in Dec (J2000) | -0.000566 |
| Radial Velocity | +003.3km s-1 |
| Trigonometric Parallax | +0.00153s |
| Trigonometric Parallax Uncertainty | 0.00077s |
| GCI Unit Vector in X (J2000) | -0.844116 |
| GCI Unit Vector in Y (J2000) | 0.451983 |
| GCI Unit Vector in Z (J2000) | 0.288408 |
| Galactic Longitude | 219.54° |
Galactic Latitude
| 50.75°
|
| Observational Data |
| Observed Visual Magnitude (V) | 3.52 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.002 |
| Observed B Magnitude | 3.49 |
| Observed B-V Colour | -0.029 |
| Observed B Magnitude or (B-V) Magnitude Uncertainty | 0.003 |
| Observed U Magnitude | |
| Observed U-B Colour | |
| Observed U Magnitude or (U-B) Magnitude Uncertainty | |
| Observed Photovisual Magnitude | 3.6 |
| Observed Photographic Magnitude | |
| Morgan Keenan (MK) Spectral Type | A0Ib |
| One-Dimensional Spectral Class | A0 |
| Position Angle | 342 |
| Year of Observation | 1991. AD |
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