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Centaur

2017 AO19

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(2017 AO19)

Where is it now

Distance from Sun
11.07 AU
True anomaly
186.49°
Distance from Earth
10.922 AU
As of
11 October 2026

Two-body Kepler propagation — accurate to ~0.1% for major planets over decades, less so for highly-perturbed bodies. Use JPL Horizons for high precision.

Orbit of Mercury Orbit of Venus Orbit of Mars Sun Earth — 0.998 AU from the Sun Earth 2017 AO19 — 11.07 AU from the Sun 2017 AO19
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2017 AO19 is 10.922 AU from Earth today (1.5 light-hours).

In the sky

Right ascension
19h 37m 42s
Declination
-10° 28′ 24″
Constellation
Aquila
Distance from Earth
10.93 AU
Elongation from the Sun
95.24° — well clear of the Sun

Visible from both hemispheres.

From your location

See how high it is right now, whether it is up after civil twilight, and when it rises and sets where you are.

How do I find my coordinates?

Google Maps on a computer

  1. Right-click the spot where you'll be observing.
  2. The first line of the menu is the coordinates, e.g. 51.50722, -0.12758 — click it and they're copied.
  3. Paste them above.

Google Maps on a phone

  1. Press and hold the spot to drop a pin.
  2. The coordinates appear in the search bar (or on the pin's card) — tap to copy, then paste above.

A full Google Maps link works too, but the short maps.app.goo.gl share links don't carry coordinates — copy the numbers instead. We round to about a kilometre; that's all the sky calculation needs.

Know your what3words address? Paste it, e.g. ///filled.count.soap. This is optional — the three words are sent to what3words to convert them, and we don't store the address or the result.

Your location stays in your browser and is sent only for this calculation. Using a what3words address is optional; if you do, the three words go to what3words to be converted and we don't record them. Set a location first, then you can save an email alert for this object. See our privacy policy.

Two-body approximation, good to about a degree for the planets — enough to find the constellation and know whether it is up.

Orbital elements

Semi-major axis
6.628 AU
Eccentricity
0.6946
Inclination
23.75°
Orbital period
17.06 years
Perihelion
2.024 AU
Aphelion
11.231 AU
Longitude of ascending node
274.06°
Argument of periapsis
201.18°
Epoch · J2000
2461200.5
Orbit class · CEN
Centaur
Earth MOID · 410.8 LD
1.0556 AU
Tisserand (Jupiter)
2.271

Orbit quality

Orbit reasonably well determined (uncertainty code 5).

Observations used
68
Data arc
135 days
First observed
14 November 2016
Last observed
29 March 2017
Residual RMS
0.53 ″
Solution · Otto Matic
15 April 2021

Visual & observation

Absolute magnitude (H)
17.7

Discovery & classification

Centaur

Close approaches 5 on record

When (UTC) Body Distance Lunar distances Relative speed
2106-12-05 22:35:00 Satrn 1.184 AU 460.8 LD 7.1 km/s
2173-02-22 07:28:00 Juptr 1.4254 AU 554.7 LD 12.1 km/s
2195-06-16 04:40:00 Satrn 1.4468 AU 563.0 LD 5.3 km/s

Next ten from today. 1 lunar distance = 384,400 km. Source: JPL close-approach data.

Sources