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Asteroid Near-Earth

2023 RD15

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(2023 RD15)

Where is it now

Distance from Sun
0.804 AU
True anomaly
336.69°
Distance from Earth
0.866 AU
As of
24 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 — 0.994 AU from the Sun Earth 2023 RD15 — 0.804 AU from the Sun 2023 RD15
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2023 RD15 is 0.866 AU from Earth today (7.2 light-minutes).

In the sky

Right ascension
10h 47m 17s
Declination
+05° 44′ 01″
Constellation
Sextans
Distance from Earth
0.87 AU
Elongation from the Sun
50.59° — near the Sun — look low at dusk or dawn

Visible from both hemispheres.

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
0.974 AU
Eccentricity
0.1849
Inclination
2.12°
Orbital period
351.2 days
Perihelion
0.794 AU
Aphelion
1.154 AU
Longitude of ascending node
156.62°
Argument of periapsis
314.36°
Epoch · J2000
2461200.5
Orbit class · ATE
Aten
Earth MOID · 5.9 LD
0.0151 AU
Tisserand (Jupiter)
6.191

Orbit quality

Orbit reasonably well determined (uncertainty code 4).

Observations used
23
Data arc
3 days
First observed
15 September 2023
Last observed
18 September 2023
Residual RMS
0.37 ″
Solution · Otto Matic
19 September 2023

Visual & observation

Absolute magnitude (H)
26.89

Discovery & classification

Aten Near-Earth Object

Close approaches 70 on record

Flyby geometry
Ecliptic flyby of 2023 RD15 at 2044-05-18 06:36 UTC Top-down view of the ecliptic, Earth at the centre, for the 2044-05-18 06:36 UTC close approach of 2023 RD15. Catalogue miss distance 157.4 LD · 6.05 × 10⁷ km. The curve is the geocentric path from 2044-05-15 to 2044-05-21, 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. 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 2044-05-18 06:36 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2044-05-18 06:36 UTC close approach of 2023 RD15. Catalogue miss distance 157.4 LD · 6.05 × 10⁷ km. The curve is the geocentric path from 2044-05-15 to 2044-05-21, 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. 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
2028-11-10 12:03:00 Venus 0.144 AU 56.0 LD 0.9 km/s
2044-03-24 00:54:00 Venus 0.132 AU 51.4 LD 0.4 km/s
2044-05-18 06:36:00 Earth 0.4046 AU 157.4 LD 17 km/s
2045-05-07 18:18:00 Earth 0.1705 AU 66.3 LD 9.9 km/s
2046-05-08 22:27:00 Earth 0.0764 AU 29.7 LD 3.2 km/s
2047-01-29 20:31:00 Earth 0.1858 AU 72.3 LD 6 km/s
2047-07-27 06:42:00 Earth 0.1358 AU 52.8 LD 4.3 km/s
2047-12-04 19:41:00 Earth 0.1701 AU 66.2 LD 5.1 km/s
2048-09-22 20:07:00 Earth 0.0265 AU 10.3 LD 5.7 km/s
2049-09-13 13:19:00 Earth 0.2826 AU 110.0 LD 13.4 km/s

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

Sources