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Asteroid 20 Massalia

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Asteroid 20 Massalia Position

Asteroid 20 Massalia is currently in the constellation of Libra. The current Right Ascension is 15h 40m 23s and the Declination is -18° 57’ 34”.

15h 40m 23s
-18° 57’ 34”

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

Map showing Asteroid 20 Massalia in Libra on August, 23 2019
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]

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

20 Massalia
RA: 15h 40m 23s
Dec: -18° 57’ 34”
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 383,941,220 kilometers, equivalent to 2.566489 Astronomical Units. Light takes 21 minutes and 20.6901 seconds to travel from Asteroid 20 Massalia and arrive to us.

21 minutes and 20.6901 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 1.07706230 Astronomical Units, or 161,126,227 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 11.65.


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: 109.0°
Max altitude: 19.6°
Azimuth: 251.0°
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, consideting the effect of the atmospheric refraction. As the atmoshpere 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 26 April 2019 00:00 UTC (JD: 2458600.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.14206669
Orbit inclination i 0.70875136°
Perihelion distance q 2.06743208 AU
309,283,437 km
Aphelion distance Q 2.75213150 AU
411,713,013 km
Semi-major axis a 2.40978179 AU
360,498,225 km
Orbital period period 3.7400 years
1,366.3596 days
Date of perihelion transit Tp 2018-Feb-04 07:04:34
2,458,153.7948 JD
Next perihelion transit 2021-Nov-01 15:42
2,459,520.1544 JD
Argument of perihelion peri 256.77328950829°
Longitude of the ascending node node 206.10882926239°
Mean anomaly M 117.69512049937°
Mean motion n 0.26347384°/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
2019 Aug 16 15h 33m 39s -18° 34’ 05” 11.55 Libra
2019 Aug 17 15h 34m 29s -18° 37’ 02” 11.56 Libra
2019 Aug 18 15h 35m 20s -18° 40’ 03” 11.58 Libra
2019 Aug 19 15h 36m 11s -18° 43’ 05” 11.59 Libra
2019 Aug 20 15h 37m 05s -18° 46’ 09” 11.60 Libra
2019 Aug 21 15h 37m 58s -18° 49’ 17” 11.61 Libra
2019 Aug 22 15h 38m 53s -18° 52’ 26” 11.63 Libra
2019 Aug 23 15h 39m 48s -18° 55’ 36” 11.64 Libra
2019 Aug 24 15h 40m 45s -18° 58’ 50” 11.65 Libra
2019 Aug 25 15h 41m 43s -19° 02’ 04” 11.66 Libra
2019 Aug 26 15h 42m 41s -19° 05’ 21” 11.67 Libra
2019 Aug 27 15h 43m 40s -19° 08’ 39” 11.68 Libra
2019 Aug 28 15h 44m 39s -19° 11’ 58” 11.69 Libra
2019 Aug 29 15h 45m 41s -19° 15’ 20” 11.71 Libra