Asteroid 11 Parthenope is a large, main-belt asteroid with a diameter of approximately 162 kilometers. It was discovered on May 11, 1850, by Italian astronomer Annibale de Gasparis and named after the Siren of Greek mythology, Parthenope. The asteroid orbits the Sun between Mars and Jupiter, with a semi-major axis of approximately 2.45 astronomical units (AU) and an orbital period of about 4.04 years. Parthenope's orbit is relatively eccentric and inclined compared to other asteroids in the main belt. It rotates slowly, with a rotation period of about 16 hours. Parthenope is also classified as a C-type asteroid, indicating that its surface is likely rich in carbonaceous materials.
Asteroid 11 Parthenope Position Calculator
Compute the position of Asteroid 11 Parthenope for any date and time between 1 January 1900 and 31 December 2099 and visualize the results on an interactive sky map.
In Evidence
Asteroid 11 Parthenope
Asteroid 11 Parthenope is in the constellation of
Taurus,
at a distance of
Finder Charts
View interactive star map
High precision deep sky finder chart, 60 arcmin wide, showing where Asteroid 11 Parthenope is right now. Click on the image to see a more detailed fullscreen tracker view.
Also check out Where is Asteroid 11 Parthenope?, a page that provides all the information needed to find Asteroid 11 Parthenope in the sky and additional links to sky charts.
Celestial Coordinates
Apparent
J2000
Additional Information
Rise and Set Times
Today's rise, transit and set times of Asteroid 11 Parthenope from Greenwich, UK (all times relative to the local timezone Europe/London):
- 11 Parthenope is above the horizon from Greenwich, UK.
- Right now it is placed in the West-North-West direction at an altitude of 1.77° above the horizon.
- Given its current magnitude, 11 Parthenope is visible with the help of a telescope having an aperture of 4 inches (100mm) or more.
- Go to interactive sky chart
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Distance from Earth
The distance of Asteroid 11 Parthenope from Earth is currently
The following chart shows the distance of Asteroid 11 Parthenope from Earth as a function of time. In the chart the distance data is measured in Astronomical Units and sampled with an interval of 1 day.
The value of the reported distance might be somewhat inaccurate around the times of closest approach for objects passing extremely close to Earth. The value of the distance of 11 Parthenope from Earth is also available as a real time updated value in the Live Position and Data Tracker.
Closest Approach
Between 1 January 1900 and 31 December 2099, the closest approach of Asteroid 11 Parthenope to Earth happens on Mon Aug 11 2081 at a distance of 1.187050 Astronomical Units, or 177,580,172 kilometers:
NOTE: values for the closest approach are computed with a sampling interval of 1 day.
Light Curve
The following chart is the predicted light curve (visual magnitude as a function of time) of Asteroid 11 Parthenope, according to the most recent ephemerides data. Magnitude data is sampled with a 2 days interval and there might be inaccuracies for objects changing brightness very rapidly during the course of a few days. For comets there could be large discrepancies between the observed and predicted brightness because of their highly dynamic behaviour.
Orbital Elements
The following table lists the orbital elements of Asteroid 11 Parthenope at epoch 24 February 2023 00:00 UTC (JD: 2460000.5). Source: JPL Small-Body Database
| Element | Symbol | Value |
|---|---|---|
| Orbit eccentricity | e | 0.09941749 |
| Orbit inclination | i | 4.63133416° |
| Perihelion distance | q | 2.20919106 AU 330,490,279 km |
| Aphelion distance | Q |
2.69694697 AU 403,457,525 km |
| Semi-major axis | a |
2.45306902 AU 366,973,902 km |
| Orbital period | period |
3.8421 years 1,403.3406 days |
| Date of perihelion transit | Tp | 2024-Jan-11 04:26:02 2,460,320.6847 JD |
| Next perihelion transit | 2027-Nov-14 12:36 2,461,724.0253 JD |
|
| Argument of perihelion | peri | 195.73724774726° |
| Longitude of the ascending node | node | 125.52086857436° |
| Mean anomaly | M | 277.86276820831° |
| Mean motion | n | 0.25653075°/day |
View Asteroid 11 Parthenope in the 3D Solar System Simulator
Physical Data
The following shows the known values of the most important physical parameters of Asteroid 11 Parthenope. Source: JPL Small-Body Database
| Physical Parameter | Value | Relative to Earth |
|---|---|---|
| Diameter | 153.33 km | 0.0120 |
| Sideral Rotation | 13.7204 hours | 0.5732 |
| Absolute Magnitude | 6.55 | |
| Geometric Albedo | 0.1803 |
15 Days Ephemeris
The following table lists the ephemerides of Asteroid 11 Parthenope computed for the past and next 7 days, with a 24 hours interval. Apparent celestial coordinates are provided.
| Date | Right AscensionR.A. | DeclinationDec. | MagnitudeMag | Constellation |
|---|---|---|---|---|
| 2025 May 10 | 05h 28m 29s | +21° 24’ 15” | 12.20 | Taurus |
| 2025 May 11 | 05h 30m 14s | +21° 26’ 30” | 12.19 | Taurus |
| 2025 May 12 | 05h 32m 00s | +21° 28’ 41” | 12.19 | Taurus |
| 2025 May 13 | 05h 33m 46s | +21° 30’ 47” | 12.19 | Taurus |
| 2025 May 14 | 05h 35m 33s | +21° 32’ 47” | 12.19 | Taurus |
| 2025 May 15 | 05h 37m 19s | +21° 34’ 43” | 12.19 | Taurus |
| 2025 May 16 | 05h 39m 06s | +21° 36’ 35” | 12.19 | Taurus |
| 2025 May 17 | 05h 40m 53s | +21° 38’ 21” | 12.18 | Taurus |
| 2025 May 18 | 05h 42m 40s | +21° 40’ 03” | 12.18 | Taurus |
| 2025 May 19 | 05h 44m 27s | +21° 41’ 40” | 12.18 | Taurus |
| 2025 May 20 | 05h 46m 14s | +21° 43’ 12” | 12.18 | Taurus |
| 2025 May 21 | 05h 48m 01s | +21° 44’ 39” | 12.17 | Taurus |
| 2025 May 22 | 05h 49m 49s | +21° 46’ 01” | 12.17 | Taurus |
| 2025 May 23 | 05h 51m 37s | +21° 47’ 18” | 12.17 | Orion |
Additional Resources on TheSkyLive
- Asteroid 11 Parthenope: Complete reference information on TheSkyLive.com
- Where is Asteroid 11 Parthenope?: Key information on locating Asteroid 11 Parthenope in the sky.
- Distance from Earth: Find out how far Asteroid 11 Parthenope is from Earth right now.
- How Bright is Asteroid 11 Parthenope?: Current visual brightness (magnitude) and apparent size.
- Rise and Set Times: Asteroid 11 Parthenope's rise and set times from your location.
- Interactive Sky Map: planetarium-style interactive visualization of Asteroid 11 Parthenope's position in the sky.
- Live Position Tracker: high precision position tracker with deep space imagery.
- Ephemeris: 15 days Asteroid 11 Parthenope's computed ephemeris.
- Orbital elements: information about Asteroid 11 Parthenope orbital parameters.
- Orbit Visualization. 3d interactive visualization showing the orbit of Asteroid 11 Parthenope with respect to the major Solar System objects.
- Physical Data. Detailed information about physical properties of Asteroid 11 Parthenope, such as mass and geometric properties.