Your guide to the Solar System and the night sky
Latest Perseverance Images received 4 hours 21 mins ago for Sol242, Sol240
Please help keep TheSkyLive ads-free, DONATE NOW via PayPal!. This site cannot run without your voluntary donations.
🌎  Greenwich, United Kingdom [change]

Asteroid 20 Massalia

Asteroid 20 Massalia is currently in the constellation of Cancer. The current Right Ascension of Asteroid 20 Massalia is 08h 45m 09s and the Declination is +17° 16’ 48” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current magnitude of Asteroid 20 Massalia is 10.60 (JPL).

Summary of key facts about Asteroid 20 Massalia [tip: you can also create a Quick Access page for this data if you access it frequently and would like to have a simpler view]:

08h 45m 09s
+17° 16’ 48”
Cancer
10.60
  • 20 Massalia is above the horizon from Greenwich, United Kingdom [change].
  • It is visible looking in the West-North-West direction at an altitude of 9° above the horizon.
  • Given its current magnitude, 20 Massalia is visible with the help of a binocular with a 70-80mm aperture or a small telescope.
  • See also 20 Massalia rise and set times.
  • 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.

Additional information about Asteroid 20 Massalia available on TheSkyLive:

Available Resources

Asteroid 20 Massalia Position and Finder Charts

Below we provide Asteroid 20 Massalia finder charts showing where the object is right now in the sky with respect to the brightest stars. The first finder chart has a field of view of 50 degrees, while the second one has a field of view of 10 degrees. Click on each finder chart to access a full screen interactive Online Planetarium.

Map showing Asteroid 20 Massalia in Cancer on October, 26 2021
Field of view: 50x30 degrees
View fullscreen
Map showing Asteroid 20 Massalia in Cancer on October, 26 2021
Field of view: 10x6 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, 60 arcmin wide, showing where Asteroid 20 Massalia is right now. Click on the image to see a more detailed fullscreen tracker view.

20 Massalia
RA: 08h 45m 09s
Dec: +17° 16’ 48”
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 from Earth

The distance of Asteroid 20 Massalia from Earth is currently 286,792,776 kilometers, equivalent to 1.917091 Astronomical Units. Light takes 15 minutes and 56.6377 seconds to travel from Asteroid 20 Massalia and arrive to us.

286,792,776
1.917091
15 minutes and 56.6377 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 1.077062 Astronomical Units, or 161,126,220 kilometers:

Mon Jan 6 2048
161,126,220
1.077062

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 10.60.

10.60

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: 72.8°
Max altitude: 55.8°
Azimuth: 287.3°

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
2021 Oct 19 08h 33m 06s +18° 04’ 45” 10.69 Cancer
2021 Oct 20 08h 34m 45s +17° 58’ 24” 10.67 Cancer
2021 Oct 21 08h 36m 23s +17° 52’ 04” 10.66 Cancer
2021 Oct 22 08h 37m 59s +17° 45’ 42” 10.65 Cancer
2021 Oct 23 08h 39m 37s +17° 39’ 21” 10.64 Cancer
2021 Oct 24 08h 41m 12s +17° 33’ 00” 10.63 Cancer
2021 Oct 25 08h 42m 47s +17° 26’ 38” 10.62 Cancer
2021 Oct 26 08h 44m 20s +17° 20’ 16” 10.61 Cancer
2021 Oct 27 08h 45m 52s +17° 13’ 54” 10.59 Cancer
2021 Oct 28 08h 47m 25s +17° 07’ 33” 10.58 Cancer
2021 Oct 29 08h 48m 56s +17° 01’ 13” 10.57 Cancer
2021 Oct 30 08h 50m 26s +16° 54’ 52” 10.56 Cancer
2021 Oct 31 08h 51m 54s +16° 48’ 33” 10.54 Cancer
2021 Nov 01 08h 53m 21s +16° 42’ 15” 10.53 Cancer