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public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 4:45 
Transit: 12:59 
Sunset: 21:13
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Dwarf Planets and Asteroids » 

Asteroid 11 Parthenope

Above the horizon.  Rise: 6:11 | Tran: 14:10 | Set: 22:10
Alt: 5.77°   Az: 61.57°   Direction: East-North-East

Asteroid 11 Parthenope is in the constellation of Gemini, at a distance of 536,328,761.0 kilometers from Earth. The current Right Ascension is 06h 22m 50s and the Declination is +21° 56’ 18” (apparent coordinates). The magnitude of Asteroid 11 Parthenope is 12.09.

Finder Charts

Map showing Asteroid 11 Parthenope in Gemini on June, 09 2025. Field of view: 50x30 degrees
View interactive star map
Sky map showing Asteroid 11 Parthenope in Gemini on June, 09 2025. Field of view: 15x9 degrees. View in interactive sky chart

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.

11 Parthenope
RA: 06h 21m 18s
Dec: +21° 57’ 07”
Deep sky finder chart for Asteroid 11 Parthenope. Field of view: 60x40 arcmins. View in deep sky object tracker

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

06h 22m 50s
+21° 56’ 18”
16h 42m 24s
23h 05m 15s

J2000

06h 21m 18s
+21° 57’ 07”

Additional Information

Gemini
12.09

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):

Azimuth: 68.1°
Max altitude: 60.5°
Azimuth: 291.9°
  • 11 Parthenope is above the horizon from Greenwich, UK.
  • Right now it is placed in the East-North-East direction at an altitude of 5.77° 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

If you need to access this information frequently for your observations, you can create a simple customized Quick Access page, so that you can easily bookmark it in your browser favorites or add a shortcut to your mobile phones' home screen.

Distance from Earth

The distance of Asteroid 11 Parthenope from Earth is currently 536,328,761.0 kilometers, equivalent to 3.5851363291 Astronomical Units. Light takes 29m 49.000s to travel from Asteroid 11 Parthenope and arrive to us.

536,328,761.0
3.5851363291
29m 49.000s

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.

Chart of the distance of Asteroid 11 Parthenope from Earth in Astronomical Units (au)

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:

Mon Aug 11 2081
177,580,172
1.187050

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.

Chart of the magnitude of Asteroid 11 Parthenope as a function of time

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
2h1>Orbit Visualization
Orbit Diagram of Asteroid 11 Parthenope
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 Jun 02 06h 09m 41s +21° 55’ 33” 12.13 Gemini
2025 Jun 03 06h 11m 30s +21° 55’ 55” 12.13 Gemini
2025 Jun 04 06h 13m 18s +21° 56’ 12” 12.12 Gemini
2025 Jun 05 06h 15m 07s +21° 56’ 23” 12.11 Gemini
2025 Jun 06 06h 16m 56s +21° 56’ 30” 12.11 Gemini
2025 Jun 07 06h 18m 45s +21° 56’ 32” 12.10 Gemini
2025 Jun 08 06h 20m 34s +21° 56’ 29” 12.10 Gemini
2025 Jun 09 06h 22m 23s +21° 56’ 20” 12.09 Gemini
2025 Jun 10 06h 24m 12s +21° 56’ 06” 12.09 Gemini
2025 Jun 11 06h 26m 02s +21° 55’ 48” 12.08 Gemini
2025 Jun 12 06h 27m 51s +21° 55’ 25” 12.07 Gemini
2025 Jun 13 06h 29m 40s +21° 54’ 57” 12.07 Gemini
2025 Jun 14 06h 31m 29s +21° 54’ 24” 12.06 Gemini
2025 Jun 15 06h 33m 19s +21° 53’ 46” 12.05 Gemini

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