Asteroid 40 Harmonia Observation Details
Harmonia Daily Motion
Harmonia will rise at 21:11, during twilight, and will ascend to 73° by the time twilight ends at 03:54.40 Harmonia will be visible until May, 31, when it will move too close to the Sun. During this time, its proximity to the Sun will cause it to disappear from the night sky, making it unobservable for a while.
Harmonia Visibility Timetable on October 21
Harmonia Rise and Set Timetable
| Time | Elevation | |
| Moon Rise, 0.9% illuminated | 04:37 | 73° |
| Moon Set | 15:52 | -31° |
| Astrosession begin | 17:50 | -28° |
| Harmonia rise | 21:11 | |
| Astrosession end | 03:54 | 73° |
| Harmonia transit | 04:18 | 74° |
| Civil sunrise | 04:55 | 72° |
| Sunrise | 05:23 | 69° |
Track Harmonia Position Throughout the Night
← Tue, 21 October 2025 →
| Time | |
| Altitude | |
| Azimuth |
Shift the map to change the time and observe Harmonia changing position in the night sky.
Harmonia Description
Harmonia, designated as 40 Harmonia, is a main-belt asteroid, located between Mars and Jupiter in the solar system. With a diameter of 112 km, 40 Harmonia completes its orbit around the Sun in 3.4 years. At the moment, 40 Harmonia is 1.822 AU (272,537,401 km) from Earth, and it is located in the constellation Gemini.Current position of Harmonia in Solar System
| Date | Tue, 21 October 2025 |
| Distance from Earth to Harmonia | 1.8214 AU (272,477,562km) |
| Elongation | 101° |
| Angular diameter | " |
| Magnitude | 10.8 |
Finder Chart for Harmonia
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| Object name | 40 Harmonia |
| Field of view | |
| Limiting magnitude | |
| 40 Harmonia coordinates | 7.19933, 21.16694 |
| Center coordinates | 7.19933, 21.16694 |
Annual motion of Harmonia
| Date | Wed, 22 October 2025 |
| Twighlight start | 17:49 |
| Twighlight end | 03:53 |
| Twighlight duration | 10h 4m |
| Rise | 21:12 |
| Set | 11:27 |
| Elevation at transit | 74° |
| Transit time | 04:19 |
| Equatorial coordinates | RA: 07h 12m 49s", Dec: 21° 09' 36s |
| Magnitude | 11 |
| Constellation | Gemini |
The graph illustrates the annual visibility pattern of a Harmonia, providing a comprehensive overview of its daily appearances and transit times throughout the year.
The graph is structured with the vertical axis showing the hours of the day, ranging from 12 AM to 12 AM the next day, while the horizontal axis spans each day of the year.
The reddish shaded area indicates the periods when the Harmonia is above the horizon, visible to observers. The white line marks the times when the celestial object reaches its highest point in the sky each day, known as the transit.
The graph is structured with the vertical axis showing the hours of the day, ranging from 12 AM to 12 AM the next day, while the horizontal axis spans each day of the year.
The reddish shaded area indicates the periods when the Harmonia is above the horizon, visible to observers. The white line marks the times when the celestial object reaches its highest point in the sky each day, known as the transit.
Astrometric & Physical Parameters of 40 Harmonia
Coordinates & Visibility
| Right Ascension | 7.19933° |
| Declination | 21.16694° |
| Magnitude | 10.8 |
| Constellation | Gemini |
| Elevation | -31.3° |
| Azimuth | 5.1° |
Acknowledgments
We acknowledge NASA's Jet Propulsion Laboratory (JPL) for providing essential data on asteroids and comets through their Small-Body Database (SBDB) and Center for Near-Earth Object Studies (CNEOS). Their continuous efforts in tracking and cataloging these celestial bodies make it possible to offer accurate and up-to-date information on their positions, orbits, and physical characteristics.