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Asteroid Near-Earth

18172

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18172 (2000 QL7)

Where is it now

Distance from Sun
2.594 AU
True anomaly
232.78°
Distance from Earth
2.364 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 18172 — 2.594 AU from the Sun 18172
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 18172 is 2.364 AU from Earth today (19.7 light-minutes).

In the sky

Right ascension
19h 33m 48s
Declination
-30° 20′ 21″
Constellation
Sagittarius
Distance from Earth
2.37 AU
Elongation from the Sun
91.27° — well clear of the Sun

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
2.426 AU
Eccentricity
0.5109
Inclination
17.83°
Orbital period
3.78 years
Perihelion
1.186 AU
Aphelion
3.665 AU
Longitude of ascending node
338.42°
Argument of periapsis
100.78°
Epoch · J2000
2461200.5
Orbit class · AMO
Amor
Earth MOID · 142.3 LD
0.3655 AU
Tisserand (Jupiter)
3.263

Orbit quality

Orbit very well determined (uncertainty code 0).

Observations used
4,582
Data arc
49.05 years
First observed
21 July 1977
Last observed
7 August 2026
Residual RMS
0.3 ″
Solution · Otto Matic
3 September 2026

Physical properties

Rotation period
2.38 hours

Visual & observation

Absolute magnitude (H)
15.69

Discovery & classification

Discovered by
LINEAR
Discovery date
25 August 2000
Discovery site
Socorro

Also known as 2000 QL7 · 1986 CA

Amor Near-Earth Object

Sources