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Asteroid Near-Earth

2004 BT58

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(2004 BT58)

Where is it now

Distance from Sun
1.31 AU
True anomaly
167.18°
Distance from Earth
2.029 AU
As of
22 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 2004 BT58 — 1.31 AU from the Sun 2004 BT58
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2004 BT58 is 2.029 AU from Earth today (16.9 light-minutes).

In the sky

Right ascension
11h 40m 43s
Declination
-04° 40′ 39″
Constellation
Virgo
Distance from Earth
2.03 AU
Elongation from the Sun
33.13° — 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
0.961 AU
Eccentricity
0.3849
Inclination
17.67°
Orbital period
343.9 days
Perihelion
0.591 AU
Aphelion
1.33 AU
Longitude of ascending node
300.8°
Argument of periapsis
45.85°
Epoch · J2000
2461200.5
Orbit class · ATE
Aten
Earth MOID · 30.4 LD
0.0782 AU
Tisserand (Jupiter)
6.172

Orbit quality

Orbit very well determined (uncertainty code 0).

Observations used
141
Data arc
17.05 years
First observed
23 January 2004
Last observed
11 February 2021
Residual RMS
0.6 ″
Solution · Otto Matic
7 June 2023

Visual & observation

Absolute magnitude (H)
22.19

Discovery & classification

Aten Near-Earth Object

Close approaches 192 on record

Flyby geometry
Ecliptic flyby of 2004 BT58 at 2035-01-19 17:46 UTC Top-down view of the ecliptic, Earth at the centre, for the 2035-01-19 17:46 UTC close approach of 2004 BT58. Catalogue miss distance 145.4 LD · 5.59 × 10⁷ km. The curve is the geocentric path from 2035-01-16 to 2035-01-22, 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 145.4 LD · 5.59 × 10⁷ km 2035-01-19 17:46 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2035-01-19 17:46 UTC close approach of 2004 BT58. Catalogue miss distance 145.4 LD · 5.59 × 10⁷ km. The curve is the geocentric path from 2035-01-16 to 2035-01-22, 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
2035-01-19 17:46:00 Earth 0.3737 AU 145.4 LD 24.5 km/s
2036-01-10 09:08:00 Earth 0.0805 AU 31.3 LD 14.7 km/s
2037-01-26 19:36:00 Earth 0.283 AU 110.1 LD 11.4 km/s
2037-09-18 08:02:00 Earth 0.455 AU 177.1 LD 17.5 km/s
2038-02-27 18:16:00 Earth 0.4181 AU 162.7 LD 11.5 km/s
2038-08-10 06:33:00 Earth 0.4055 AU 157.8 LD 17.8 km/s
2039-06-29 06:16:00 Earth 0.3123 AU 121.5 LD 14.4 km/s
2040-05-17 09:14:00 Earth 0.2928 AU 113.9 LD 16.3 km/s
2041-05-28 01:24:00 Venus 0.058 AU 22.6 LD 16.9 km/s
2051-01-23 01:21:00 Earth 0.4553 AU 177.2 LD 27 km/s

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

Sources