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Asteroid 20 Massalia

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Asteroid 20 Massalia Position

Asteroid 20 Massalia is currently in the constellation of Capricornus. The current Right Ascension is 21h 34m 38s and the Declination is -13° 46’ 39”.

21h 34m 38s
-13° 46’ 39”

Simplified sky chart showing where Asteroid 20 Massalia is right now in the sky with respect to the brightest stars and constellations (see full screen Online Planetarium)

Map showing Asteroid 20 Massalia in Capricornus on April, 04 2020
Field of view: 60x30 degrees
View fullscreen
 = visible to the naked eye
 = binocular, brighter than 10th magnitude
= current altitude ≥ 30°   = current altitude < 30°   = below the horizon
Location: Greenwich, United Kingdom [change]

Higher precision deep sky finder chart showing where Asteroid 20 Massalia is right now (view fullscreen)

20 Massalia
RA: 21h 34m 38s
Dec: -13° 46’ 39”
Deep sky finder chart for Asteroid 20 Massalia
Field of view: 60x40 arcmins
View fullscreen

Also check out Where is Asteroid 20 Massalia?, a page that provides all the information needed to find Asteroid 20 Massalia in the sky and additional links to sky charts.

Asteroid 20 Massalia Distance

The distance of Asteroid 20 Massalia from Earth is currently 478,905,269 kilometers, equivalent to 3.201284 Astronomical Units. Light takes 26 minutes and 37.4560 seconds to travel from Asteroid 20 Massalia and arrive to us.

26 minutes and 37.4560 seconds

The following chart shows the distance of Asteroid 20 Massalia 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.

Distance of Asteroid 20 Massalia from Earth between January 2013 and December 2100

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 20 Massalia from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest approach of Asteroid 20 Massalia to Earth

Between January 2013 and December 2100 the closest approach of Asteroid 20 Massalia to Earth happens on Mon Jan 6 2048 at a distance of 1.07706225 Astronomical Units, or 161,126,220 kilometers:

Mon Jan 6 2048

NOTE: values for the closest approach are computed with a sampling interval of 1 day.

Asteroid 20 Massalia brightness

The current visual magnitude of Asteroid 20 Massalia is 12.00.


The following chart is the predicted light curve (visual magnitude as a function of time) of Asteroid 20 Massalia, 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.

Predicted magnitude of Asteroid 20 Massalia between January 2013 and December 2100

Asteroid 20 Massalia rise and set times

Location: Greenwich, United Kingdom [change]
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Today's Asteroid 20 Massalia rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 103.8°
Max altitude: 24.8°
Azimuth: 256.3°
Asteroid 20 Massalia is above the horizon from Greenwich, United Kingdom

The rise and set times are defined as the time at which the upper limb of Asteroid 20 Massalia touches the horizon, considering the effect of the atmospheric refraction. As the atmospheric conditions cannot be modeled precisely the times reported here should be considered correct with an approximation of few minutes.

Asteroid 20 Massalia Orbital Elements

The following table lists the orbital elements of Asteroid 20 Massalia at epoch 30 May 2020 00:00 UTC (JD: 2459000.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.14249377
Orbit inclination i 0.70856692°
Perihelion distance q 2.06603964 AU
309,075,132 km
Aphelion distance Q 2.75267670 AU
411,794,573 km
Semi-major axis a 2.40935817 AU
360,434,852 km
Orbital period period 3.7400 years
1,365.9993 days
Date of perihelion transit Tp 2021-Nov-03 21:16:25
2,459,522.3864 JD
Argument of perihelion peri 257.35095249566°
Longitude of the ascending node node 206.01320361002°
Mean anomaly M 222.4603204338°
Mean motion n 0.26354333°/day

Visualization of Asteroid 20 Massalia Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Asteroid 20 Massalia with respect of the Sun and the orbits of the major planets. The position of Asteroid 20 Massalia and the planets along their orbits in this diagram accurately represents the current configuration of the objects in the Solar System. This is an experimental feature and it requires a WebGL enabled browser. Please provide us feedback!

Orbit Diagram of Asteroid 20 Massalia
View Asteroid 20 Massalia in the 3D Solar System Simulator

Asteroid 20 Massalia Physical Data

The following shows the known values of the most important physical parameters of Asteroid 20 Massalia. Source: JPL Small-Body Database

Physical Parameter Value Relative to Earth
Diameter 145.5 km 0.0114
Sideral Rotation 8.0980 hours 0.3383
Absolute Magnitude 6.5
Geometric Albedo 0.2096

Asteroid 20 Massalia 15 Days Ephemeris

The following table lists the ephemerides of Asteroid 20 Massalia computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Asteroid 20 Massalia in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2020 Mar 28 21h 24m 20s -14° 37’ 10” 12.02 Capricornus
2020 Mar 29 21h 25m 46s -14° 30’ 15” 12.02 Capricornus
2020 Mar 30 21h 27m 12s -14° 23’ 18” 12.01 Capricornus
2020 Mar 31 21h 28m 37s -14° 16’ 23” 12.01 Capricornus
2020 Apr 01 21h 30m 02s -14° 09’ 25” 12.01 Capricornus
2020 Apr 02 21h 31m 27s -14° 02’ 27” 12.00 Capricornus
2020 Apr 03 21h 32m 52s -13° 55’ 31” 12.00 Capricornus
2020 Apr 04 21h 34m 15s -13° 48’ 33” 12.00 Capricornus
2020 Apr 05 21h 35m 39s -13° 41’ 35” 11.99 Capricornus
2020 Apr 06 21h 37m 02s -13° 34’ 36” 11.99 Capricornus
2020 Apr 07 21h 38m 25s -13° 27’ 38” 11.99 Capricornus
2020 Apr 08 21h 39m 47s -13° 20’ 39” 11.98 Capricornus
2020 Apr 09 21h 41m 08s -13° 13’ 41” 11.98 Capricornus
2020 Apr 10 21h 42m 29s -13° 06’ 43” 11.97 Capricornus