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Asteroid 20 Massalia

Available Resources

Asteroid 20 Massalia Sky Charts and Coordinates

This is a simplified sky chart, showing where Asteroid 20 Massalia is now with respect to the brightest stars and constellations.

More advanced sky charts are available on TheSkyLive for this object: 1) the Online Planetarium which is interactive and allows to select dates and additional objects to visualize; and 2) the Live Position and Data Tracker which provides the highest precision position data and features deep sky imagery from the Digitized Sky Survey.

Asteroid 20 Massalia in Gemini on May, 23 2018
High Precision Live Sky Chart
07h 56m 30s
+20° 11’ 16”
11.11
 = visible to the naked eye
 = binocular, brighter than 10th magnitude
= current altitude ≥ 30°   = current altitude < 30°   = below the horizon
Location: Greenwich, United Kingdom [change]

Asteroid 20 Massalia Rise and Set Times

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

Azimuth: 69.8°
Max altitude: 58.7°
Azimuth: 290.2°

Asteroid 20 Massalia Orbit Diagram

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 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 MagnitudeMag Right AscensionR.A. DeclinationDec. Constellation
2018 May 16 11.07 07h 42m 23s +20° 46’ 41” Gemini
2018 May 17 11.07 07h 44m 24s +20° 41’ 57” Gemini
2018 May 18 11.08 07h 46m 23s +20° 37’ 05” Gemini
2018 May 19 11.08 07h 48m 24s +20° 32’ 07” Gemini
2018 May 20 11.09 07h 50m 26s +20° 27’ 03” Gemini
2018 May 21 11.10 07h 52m 27s +20° 21’ 53” Gemini
2018 May 22 11.10 07h 54m 29s +20° 16’ 37” Gemini
2018 May 23 11.11 07h 56m 30s +20° 11’ 16” Gemini
2018 May 24 11.11 07h 58m 32s +20° 05’ 48” Gemini
2018 May 25 11.12 08h 00m 33s +20° 00’ 12” Cancer
2018 May 26 11.13 08h 02m 35s +19° 54’ 33” Cancer
2018 May 27 11.13 08h 04m 36s +19° 48’ 47” Cancer
2018 May 28 11.14 08h 06m 38s +19° 42’ 55” Cancer
2018 May 29 11.14 08h 08m 39s +19° 36’ 56” Cancer

Distance of Asteroid 20 Massalia from Earth

The following chart shows the distance of Asteroid 20 Massalia from Earth as a function of time. Distance data is measured in Astronomical Units and sampled with a 2 days interval.

The reported distances might be inaccurate around the times of closest approach for objects passing extremely close to Earth. The value of the distance of 20 Massalia is also available as a real time updated value in the Live Position and Data Tracker.

Distance of Asteroid 20 Massalia from Earth between January 2013 and December 2075

Light Curve of Asteroid 20 Massalia

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 2075

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 Orbital Elements

The following table lists the orbital elements of Asteroid 20 Massalia at epoch 22 March 2018 00:00 UTC (JD: 2458200.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.14223703
Orbit inclination i 0.70868363°
Perihelion distance q 2.06619295 AU
309,098,066 km
Aphelion distance Q 2.75143855 AU
411,609,349 km
Semi-major axis a 2.40881575 AU
360,353,708 km
Orbital period period 3.7400 years
1,365.5380 days
Date of perihelion transit Tp 2018-Feb-03 19:14:41
2,458,153.3019 JD
Next perihelion transit 2021-Oct-31 08:09
2,459,518.8399 JD
Argument of perihelion peri 256.57822947895°
Longitude of the ascending node node 206.10765072615°
Mean anomaly M 12.442953621707°
Mean motion n 0.26363235°/day
Closest approach to Earth* 2048-Jan-06
Distance of closest approach* 1.07706230 AU
161,126,227 km

* NOTE: values for the closest approach are computed for the time interval between 2013-Jan-01 and 2075-Dec-31, with a sampling interval of 1 day.