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Trans-Neptunian object

2015 HS197

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(2015 HS197)

Where is it now

Distance from Sun
32.964 AU
True anomaly
297.11°
Distance from Earth
33.896 AU
As of
16 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.

Sun Earth — 0.997 AU from the Sun Earth 2015 HS197 — 32.964 AU from the Sun 2015 HS197
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2015 HS197 is 33.896 AU from Earth today (4.7 light-hours).

In the sky

Right ascension
14h 30m 53s
Declination
-22° 27′ 40″
Constellation
Libra
Distance from Earth
33.9 AU
Elongation from the Sun
19.85° — too close to the Sun to observe

Favours the southern hemisphere; low or below the horizon from far north.

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
39.364 AU
Eccentricity
0.2553
Inclination
7.78°
Orbital period
247 years
Perihelion
29.315 AU
Aphelion
49.414 AU
Longitude of ascending node
330.58°
Argument of periapsis
315.55°
Epoch · J2000
2457131.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 11,014.6 LD
28.3025 AU
Tisserand (Jupiter)
5.402

Orbit quality

Orbit very uncertain — the object may be effectively lost (uncertainty code 9).

Observations used
3
Data arc
4 days
First observed
18 April 2015
Last observed
22 April 2015
Residual RMS
0.3 ″
Solution · Otto Matic
16 August 2026

Visual & observation

Absolute magnitude (H)
8.45

Discovery & classification

Also known as 2026 HD17

TNO

Sources