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Asteroid Near-Earth

2023 RH1

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(2023 RH1)

Where is it now

Distance from Sun
0.997 AU
True anomaly
209.22°
Distance from Earth
0.15 AU
As of
17 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 — 0.996 AU from the Sun Earth 2023 RH1 — 0.997 AU from the Sun 2023 RH1
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2023 RH1 is 0.15 AU from Earth today (1.2 light-minutes).

In the sky

Right ascension
12h 46m 48s
Declination
+75° 05′ 31″
Constellation
Draco
Distance from Earth
0.15 AU
Elongation from the Sun
85.18° — 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
0.817 AU
Eccentricity
0.2809
Inclination
10.84°
Orbital period
269.9 days
Perihelion
0.588 AU
Aphelion
1.047 AU
Longitude of ascending node
342.46°
Argument of periapsis
196.94°
Epoch · J2000
2461200.5
Orbit class · ATE
Aten
Earth MOID · 6.5 LD
0.0168 AU
Tisserand (Jupiter)
7.113

Orbit quality

Orbit poorly determined (uncertainty code 7).

Observations used
31
Data arc
24 hours
First observed
7 September 2023
Last observed
8 September 2023
Residual RMS
0.32 ″
Solution · Otto Matic
13 September 2023

Visual & observation

Absolute magnitude (H)
26.61

Discovery & classification

Aten Near-Earth Object

Close approaches 67 on record

Flyby geometry
Ecliptic flyby of 2023 RH1 at 2029-05-02 05:09 UTC Top-down view of the ecliptic, Earth at the centre, for the 2029-05-02 05:09 UTC close approach of 2023 RH1. Catalogue miss distance 157.4 LD · 6.05 × 10⁷ km. The curve is the geocentric path from 2029-04-29 to 2029-05-05, 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 a geocentric ecliptic ephemeris from JPL Horizons. The inset is a heliocentric view and is approximate. Sun 157.4 LD · 6.05 × 10⁷ km 2029-05-02 05:09 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2029-05-02 05:09 UTC close approach of 2023 RH1. Catalogue miss distance 157.4 LD · 6.05 × 10⁷ km. The curve is the geocentric path from 2029-04-29 to 2029-05-05, 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 a geocentric ecliptic ephemeris from JPL Horizons. The inset is a heliocentric view and is approximate.

JPL Horizons

When (UTC) Body Distance Lunar distances Relative speed
2026-10-15 01:19:00 Earth 0.1591 AU 61.9 LD 8.7 km/s
2027-01-17 12:11:00 Venus 0.1422 AU 55.3 LD 11.2 km/s
2029-05-02 05:09:00 Earth 0.4044 AU 157.4 LD 12.7 km/s
2029-10-16 15:41:00 Earth 0.3714 AU 144.5 LD 16.8 km/s
2030-09-29 20:18:00 Venus 0.1478 AU 57.5 LD 11.2 km/s
2032-03-30 23:41:00 Earth 0.4147 AU 161.4 LD 15.3 km/s
2034-09-03 21:16:00 Earth 0.4434 AU 172.6 LD 20.6 km/s
2035-03-01 09:48:00 Earth 0.3961 AU 154.2 LD 15 km/s
2037-08-27 08:47:00 Earth 0.1882 AU 73.2 LD 12.6 km/s
2038-01-27 06:52:00 Earth 0.3529 AU 137.4 LD 11.8 km/s

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

Sources