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Asteroid Near-Earth

2026 RH10

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(2026 RH10)

Where is it now

Distance from Sun
1.18 AU
True anomaly
151.93°
Distance from Earth
0.43 AU
As of
21 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 — 0.995 AU from the Sun Earth 2026 RH10 — 1.18 AU from the Sun 2026 RH10
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2026 RH10 is 0.43 AU from Earth today (3.6 light-minutes).

In the sky

Right ascension
20h 30m 28s
Declination
+27° 53′ 17″
Constellation
Vulpecula
Distance from Earth
0.44 AU
Elongation from the Sun
104.31° — well clear of the Sun

Favours the northern hemisphere; low or below the horizon from far south.

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
0.935 AU
Eccentricity
0.3375
Inclination
30.75°
Orbital period
330.4 days
Perihelion
0.62 AU
Aphelion
1.251 AU
Longitude of ascending node
347.25°
Argument of periapsis
238.42°
Epoch · J2000
2461294.5
Orbit class · ATE
Aten
Earth MOID · 0.1 LD
0.0002 AU
Tisserand (Jupiter)
6.249

Orbit quality

Orbit very uncertain — the object may be effectively lost (uncertainty code 8).

Observations used
21
First observed
11 September 2026
Last observed
11 September 2026
Residual RMS
0.48 ″
Solution · Otto Matic
11 September 2026

Visual & observation

Absolute magnitude (H)
27.06

Discovery & classification

Listed by JPL impact monitoring; see the Sentry table for current probabilities.

Aten Near-Earth Object

Close approaches 11 on record

Flyby geometry
Ecliptic flyby of 2026 RH10 at 2045-09-08 20:30 UTC Top-down view of the ecliptic, Earth at the centre, for the 2045-09-08 20:30 UTC close approach of 2026 RH10. Catalogue miss distance 20.9 LD · 8.05 × 10⁶ km. The curve is the geocentric path from 2045-09-05 to 2045-09-11, with a mark at UTC midnights and an arrow for the direction of motion. The circle is the Moon’s mean orbit; the Moon is plotted at closest approach. A ray shows the Sun’s direction. The labelled distance is the full separation. The drawn radius is the part that lies in the ecliptic plane. At closest approach the object is south of the ecliptic. The path is approximate: a two-body Kepler propagation of the catalogue orbital elements, not a numerical integration. The Moon’s position is approximate. The inset is a heliocentric view and is approximate. approximate Sun 6 Sep 7 Sep 10 Sep 11 Sep 20.9 LD · 8.05 × 10⁶ km 2045-09-08 20:30 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2045-09-08 20:30 UTC close approach of 2026 RH10. Catalogue miss distance 20.9 LD · 8.05 × 10⁶ km. The curve is the geocentric path from 2045-09-05 to 2045-09-11, with a mark at UTC midnights and an arrow for the direction of motion. The circle is the Moon’s mean orbit; the Moon is plotted at closest approach. A ray shows the Sun’s direction. The labelled distance is the full separation. The drawn radius is the part that lies in the ecliptic plane. At closest approach the object is south of the ecliptic. The path is approximate: a two-body Kepler propagation of the catalogue orbital elements, not a numerical integration. The Moon’s position is approximate. The inset is a heliocentric view and is approximate.

When (UTC) Body Distance Lunar distances Relative speed
2045-09-08 20:30:00 Earth 0.0538 AU 20.9 LD 17.2 km/s
2111-09-17 18:14:00 Earth 0.1972 AU 76.7 LD 22.2 km/s
2147-08-17 07:58:00 Venus 0.0986 AU 38.4 LD 20.2 km/s

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

Sources