Asteroid Near-Earth Potentially hazardous

242216

242216 (2003 RN10)

Where is it now

Distance from Sun: 1.253 AU
True anomaly: 298.33°
Distance from Earth: 2.136 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.

Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 242216 is 2.136 AU from Earth today (17.8 light-minutes).

In the sky

Right ascension: 13h 19m 09s
Declination: -27° 52′ 29″
Constellation: Hydra
Distance from Earth: 2.13 AU
Elongation from the Sun: 20.49° — near the Sun — look low at dusk or dawn

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.

Paste a location

How do I find my coordinates?

Google Maps on a computer

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

Google Maps on a phone

Press and hold the spot to drop a pin.
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: 2.23 AU
Eccentricity: 0.542
Inclination: 39.66°
Orbital period: 3.33 years
Perihelion: 1.021 AU
Aphelion: 3.439 AU
Longitude of ascending node: 267.12°
Argument of periapsis: 5.01°
Epoch · J2000: 2461200.5
Orbit class · AMO: Amor
Earth MOID · 2.6 LD: 0.0068 AU
Tisserand (Jupiter): 3.18

Orbit quality

Orbit very well determined (uncertainty code 0).

Observations used: 1,141
Data arc: 22.45 years
First observed: 13 September 2003
Last observed: 25 February 2026
Residual RMS: 0.55 ″
Solution · Otto Matic: 25 February 2026

Visual & observation

Absolute magnitude (H): 15.58

Discovery & classification

Discovered by: LONEOS
Discovery date: 13 September 2003
Discovery site: Anderson Mesa

Also known as 2003 RN10

Amor Near-Earth Object Potentially Hazardous Asteroid

Close approaches 7 on record

When (UTC)	Body	Distance	Lunar distances	Relative speed
2108-06-02 23:55:00	Juptr	1.6952 AU	659.7 LD	8.8 km/s
2131-10-17 23:51:00	Juptr	1.798 AU	699.7 LD	8.9 km/s
2191-09-23 03:53:00	Juptr	1.9006 AU	739.6 LD	9.1 km/s

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

Sources

visual properties: JPL SBDB (lookup)
orbital elements: JPL SBDB