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Asteroid Near-Earth

2023 BW9

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(2023 BW9)

Where is it now

Distance from Sun
0.876 AU
True anomaly
149.31°
Distance from Earth
1.402 AU
As of
15 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 — 0.997 AU from the Sun Earth 2023 BW9 — 0.876 AU from the Sun 2023 BW9
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2023 BW9 is 1.402 AU from Earth today (11.7 light-minutes).

In the sky

Right ascension
11h 05m 59s
Declination
+07° 49′ 48″
Constellation
Leo
Distance from Earth
1.4 AU
Elongation from the Sun
38.63° — 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
0.662 AU
Eccentricity
0.5858
Inclination
30.13°
Orbital period
196.8 days
Perihelion
0.274 AU
Aphelion
1.05 AU
Longitude of ascending node
114.45°
Argument of periapsis
216.06°
Epoch · J2000
2461200.5
Orbit class · ATE
Aten
Earth MOID · 41.1 LD
0.1057 AU
Tisserand (Jupiter)
8.359

Orbit quality

Orbit reasonably well determined (uncertainty code 3).

Observations used
36
Data arc
382 days
First observed
30 January 2023
Last observed
16 February 2024
Residual RMS
0.46 ″
Solution · Otto Matic
17 February 2024

Visual & observation

Absolute magnitude (H)
21.68

Discovery & classification

Aten Near-Earth Object

Close approaches 167 on record

Flyby geometry
Ecliptic flyby of 2023 BW9 at 2029-02-19 07:26 UTC Top-down view of the ecliptic, Earth at the centre, for the 2029-02-19 07:26 UTC close approach of 2023 BW9. Catalogue miss distance 170.7 LD · 6.56 × 10⁷ km. The curve is the geocentric path from 2029-02-16 to 2029-02-22, 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 north of the ecliptic. The path is a geocentric ecliptic ephemeris from JPL Horizons. The inset is a heliocentric view and is approximate. Sun 170.7 LD · 6.56 × 10⁷ km 2029-02-19 07:26 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2029-02-19 07:26 UTC close approach of 2023 BW9. Catalogue miss distance 170.7 LD · 6.56 × 10⁷ km. The curve is the geocentric path from 2029-02-16 to 2029-02-22, 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 north 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
2029-02-19 07:26:00 Earth 0.4386 AU 170.7 LD 19.1 km/s
2030-01-22 06:36:00 Earth 0.1827 AU 71.1 LD 16.9 km/s
2031-01-31 18:17:00 Earth 0.2859 AU 111.2 LD 27.2 km/s
2036-02-19 02:18:00 Earth 0.4304 AU 167.5 LD 18.7 km/s
2037-01-21 18:55:00 Earth 0.17 AU 66.2 LD 17.1 km/s
2038-02-01 05:57:00 Earth 0.3018 AU 117.4 LD 27.7 km/s
2043-02-17 22:04:00 Earth 0.4232 AU 164.7 LD 18.4 km/s
2044-01-22 09:44:00 Earth 0.1599 AU 62.2 LD 17.3 km/s
2045-02-01 14:46:00 Earth 0.3146 AU 122.4 LD 28.2 km/s
2050-02-16 23:44:00 Earth 0.418 AU 162.7 LD 18.2 km/s

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

Sources