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Asteroid Near-Earth

2021 TD5

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(2021 TD5)

Where is it now

Distance from Sun
1.063 AU
True anomaly
233.58°
Distance from Earth
0.942 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 2021 TD5 — 1.063 AU from the Sun 2021 TD5
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2021 TD5 is 0.942 AU from Earth today (7.8 light-minutes).

In the sky

Right ascension
10h 17m 03s
Declination
+30° 04′ 35″
Constellation
Leo Minor
Distance from Earth
0.94 AU
Elongation from the Sun
66.35° — 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
0.961 AU
Eccentricity
0.3705
Inclination
16.48°
Orbital period
344.2 days
Perihelion
0.605 AU
Aphelion
1.317 AU
Longitude of ascending node
7.59°
Argument of periapsis
201.48°
Epoch · J2000
2461200.5
Orbit class · ATE
Aten
Earth MOID · 63.3 LD
0.1628 AU
Tisserand (Jupiter)
6.179

Orbit quality

Orbit poorly determined (uncertainty code 6).

Observations used
14
Data arc
8 days
First observed
2 October 2021
Last observed
10 October 2021
Residual RMS
0.65 ″
Solution · Otto Matic
10 October 2021

Visual & observation

Absolute magnitude (H)
23.72

Discovery & classification

Aten Near-Earth Object

Close approaches 88 on record

Flyby geometry
Ecliptic flyby of 2021 TD5 at 2035-09-12 06:00 UTC Top-down view of the ecliptic, Earth at the centre, for the 2035-09-12 06:00 UTC close approach of 2021 TD5. Catalogue miss distance 186.4 LD · 7.17 × 10⁷ km. The curve is the geocentric path from 2035-09-09 to 2035-09-15, 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 186.4 LD · 7.17 × 10⁷ km 2035-09-12 06:00 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2035-09-12 06:00 UTC close approach of 2021 TD5. Catalogue miss distance 186.4 LD · 7.17 × 10⁷ km. The curve is the geocentric path from 2035-09-09 to 2035-09-15, 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
2030-10-09 11:26:00 Venus 0.1204 AU 46.8 LD 13.6 km/s
2035-09-12 06:00:00 Earth 0.479 AU 186.4 LD 25.5 km/s
2036-09-01 19:27:00 Earth 0.2039 AU 79.3 LD 15.8 km/s
2037-09-15 11:13:00 Earth 0.2257 AU 87.8 LD 11.1 km/s
2038-05-16 10:31:00 Earth 0.4229 AU 164.6 LD 16.5 km/s
2038-10-14 07:30:00 Earth 0.3347 AU 130.2 LD 11.5 km/s
2039-04-07 15:37:00 Earth 0.3943 AU 153.4 LD 18 km/s
2039-11-15 01:49:00 Earth 0.351 AU 136.6 LD 10.6 km/s
2040-02-26 03:13:00 Earth 0.335 AU 130.4 LD 14.8 km/s
2040-12-31 09:01:00 Earth 0.2808 AU 109.3 LD 12.7 km/s

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

Sources