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Asteroid 17 Thetis

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Asteroid 17 Thetis Position

Asteroid 17 Thetis is currently in the constellation of Libra. The current Right Ascension is 15h 31m 16s and the Declination is -15° 29’ 53”.

15h 31m 16s
-15° 29’ 53”

Simplified sky chart showing where Asteroid 17 Thetis is right now in the sky with respect to the brightest stars and constellations (see fuillscreen Online Planetarium)

Map showing Asteroid 17 Thetis in Libra on October, 21 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 17 Thetis is right now (view fullscreen)

17 Thetis
RA: 15h 31m 16s
Dec: -15° 29’ 53”
Deep sky finder chart for Asteroid 17 Thetis
Field of view: 60x40 arcmins
View fullscreen

Also check out Where is Asteroid 17 Thetis?, a page that provides all the information needed to find Asteroid 17 Thetis in the sky and additional links to sky charts.

Asteroid 17 Thetis Distance

The distance of Asteroid 17 Thetis from Earth is currently 446,717,039 kilometers, equivalent to 2.986119 Astronomical Units. Light takes 24 minutes and 50.0876 seconds to travel from Asteroid 17 Thetis and arrive to us.

24 minutes and 50.0876 seconds

The following chart shows the distance of Asteroid 17 Thetis 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 17 Thetis 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 17 Thetis from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest approach of Asteroid 17 Thetis to Earth

Between January 2013 and December 2100 the closest approach of Asteroid 17 Thetis to Earth happens on Sun Jun 10 2035 at a distance of 1.13909773 Astronomical Units, or 170,406,596 kilometers:

Sun Jun 10 2035

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

Asteroid 17 Thetis brightness

The current visual magnitude of Asteroid 17 Thetis is 12.53.


The following chart is the predicted light curve (visual magnitude as a function of time) of Asteroid 17 Thetis, 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 17 Thetis between January 2013 and December 2100

Asteroid 17 Thetis 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 17 Thetis rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 105.5°
Max altitude: 23.0°
Azimuth: 254.4°
Asteroid 17 Thetis is below the horizon from Greenwich, United Kingdom

The rise and set times are defined as the time at which the upper limb of Asteroid 17 Thetis 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 17 Thetis Orbital Elements

The following table lists the orbital elements of Asteroid 17 Thetis at epoch 26 April 2019 00:00 UTC (JD: 2458600.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.13303160
Orbit inclination i 5.59120477°
Perihelion distance q 2.14171893 AU
320,396,593 km
Aphelion distance Q 2.79898924 AU
418,722,831 km
Semi-major axis a 2.47035409 AU
369,559,712 km
Orbital period period 3.8800 years
1,418.1992 days
Date of perihelion transit Tp 2019-Dec-06 02:42:27
2,458,823.6128 JD
Argument of perihelion peri 136.20825168304°
Longitude of the ascending node node 125.55294367489°
Mean anomaly M 303.36436367027°
Mean motion n 0.25384304°/day

Visualization of Asteroid 17 Thetis Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Asteroid 17 Thetis with respect of the Sun and the orbits of the major planets. The position of Asteroid 17 Thetis 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 17 Thetis
View Asteroid 17 Thetis in the 3D Solar System Simulator

Asteroid 17 Thetis Physical Data

The following shows the known values of the most important physical parameters of Asteroid 17 Thetis. Source: JPL Small-Body Database

Physical Parameter Value Relative to Earth
Diameter 90.04 km 0.0071
Sideral Rotation 12.2705 hours 0.5127
Absolute Magnitude 7.76
Geometric Albedo 0.1715

Asteroid 17 Thetis 15 Days Ephemeris

The following table lists the ephemerides of Asteroid 17 Thetis computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Asteroid 17 Thetis in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2019 Oct 14 15h 16m 18s -14° 25’ 36” 12.56 Libra
2019 Oct 15 15h 18m 21s -14° 34’ 50” 12.56 Libra
2019 Oct 16 15h 20m 26s -14° 43’ 59” 12.55 Libra
2019 Oct 17 15h 22m 32s -14° 53’ 03” 12.55 Libra
2019 Oct 18 15h 24m 38s -15° 02’ 03” 12.55 Libra
2019 Oct 19 15h 26m 44s -15° 10’ 58” 12.54 Libra
2019 Oct 20 15h 28m 50s -15° 19’ 46” 12.54 Libra
2019 Oct 21 15h 30m 56s -15° 28’ 32” 12.53 Libra
2019 Oct 22 15h 33m 03s -15° 37’ 11” 12.53 Libra
2019 Oct 23 15h 35m 11s -15° 45’ 47” 12.53 Libra
2019 Oct 24 15h 37m 18s -15° 54’ 15” 12.52 Libra
2019 Oct 25 15h 39m 27s -16° 02’ 40” 12.52 Libra
2019 Oct 26 15h 41m 35s -16° 10’ 59” 12.51 Libra
2019 Oct 27 15h 43m 44s -16° 19’ 13” 12.51 Libra