HD 187923

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HD 187923 is a Sun-like star in the constellation Aquila. It is a dim star, just barely visible to the naked eye with an apparent magnitude around 6.15. Based on its parallax, it lies about 88 light-years away and is moving toward us at about 20.7 km/s. It also has a noticeable proper motion across the sky, about 0.48 arcseconds per year.

This star is a G0 V type, meaning it is a G-type main-sequence star similar to the Sun and often considered a solar analogue. It is larger and more luminous than the Sun, with a radius about 1.44 times solar and a luminosity around 2.1 times that of the Sun. Its surface temperature is roughly 5,774 K. Its mass is estimated to be around 1.0 to 1.3 solar masses (about 1.3 solar masses in some studies). HD 187923 has a near-solar chemical makeup with [Fe/H] about -0.11.

HD 187923 is relatively old, about 9 to 10 billion years, and it spins very slowly (projected rotational velocity about 0.1 km/s). It is a suspected variable star, meaning its brightness might vary slightly over time. The star has several alternate names, including NSV 12490, BD+11°4019, GJ 4126, HIP 97767, HR 7569, and WDS J19521+1138A.

Key facts:
- Location: Aquila
- Distance: ~88 light-years
- Apparent magnitude: ~6.15
- Spectral type: G0 V (solar analogue)
- Radius: ~1.44 R_sun
- Mass: ~1.0–1.3 M_sun
- Luminosity: ~2.1 L_sun
- Temperature: ~5,774 K
- Metallicity: [Fe/H] ~ -0.11
- Age: ~9–10 billion years
- Motion: radial velocity ~ -20.7 km/s; proper motion ~ 0.48 arcsec/yr
- Variability: suspected variable