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Asteroid Near-Earth

2026 TN77

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(2026 TN77)

Where is it now

Distance from Sun
1.042 AU
True anomaly
142.61°
Distance from Earth
0.067 AU
As of
19 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 2026 TN77 — 1.042 AU from the Sun 2026 TN77
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2026 TN77 is 0.067 AU from Earth today (33.4 light-seconds).

In the sky

Right ascension
22h 34m 50s
Declination
-01° 16′ 37″
Constellation
Aquarius
Distance from Earth
0.07 AU
Elongation from the Sun
132.82° — well clear of the Sun

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
0.838 AU
Eccentricity
0.5023
Inclination
5.72°
Orbital period
280.1 days
Perihelion
0.417 AU
Aphelion
1.258 AU
Longitude of ascending node
19.16°
Argument of periapsis
221.94°
Epoch · J2000
2461200.5
Orbit class · ATE
Aten
Earth MOID · 0.1 LD
0.0002 AU
Tisserand (Jupiter)
6.902

Orbit quality

Orbit poorly determined (uncertainty code 6).

Observations used
30
Data arc
2 days
First observed
13 October 2026
Last observed
15 October 2026
Residual RMS
0.39 ″
Solution · Otto Matic
16 October 2026

Visual & observation

Absolute magnitude (H)
27.18

Discovery & classification

Aten Near-Earth Object

Close approaches 99 on record

Flyby geometry
Ecliptic flyby of 2026 TN77 at 2028-01-09 05:02 UTC Top-down view of the ecliptic, Earth at the centre, for the 2028-01-09 05:02 UTC close approach of 2026 TN77. Catalogue miss distance 71.8 LD · 2.76 × 10⁷ km. The curve is the geocentric path from 2028-01-06 to 2028-01-12, 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 71.8 LD · 2.76 × 10⁷ km 2028-01-09 05:02 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2028-01-09 05:02 UTC close approach of 2026 TN77. Catalogue miss distance 71.8 LD · 2.76 × 10⁷ km. The curve is the geocentric path from 2028-01-06 to 2028-01-12, 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
2026-10-12 10:06:00 Moon 0.0018 AU 0.7 LD 14.3 km/s
2026-10-12 10:10:00 Moon 0.0018 AU 0.7 LD 14.3 km/s
2026-10-12 15:25:00 Earth 0.0004 AU 0.1 LD 15.3 km/s
2026-10-12 15:28:00 Earth 0.0004 AU 0.1 LD 15.3 km/s
2028-01-09 05:02:00 Earth 0.1844 AU 71.8 LD 18.6 km/s
2028-01-09 06:12:00 Earth 0.1831 AU 71.3 LD 18.5 km/s
2028-03-17 22:45:00 Mercury 0.0348 AU 13.5 LD 21.3 km/s
2028-03-18 01:29:00 Merc 0.0356 AU 13.9 LD 21.5 km/s
2030-07-19 08:40:00 Mercury 0.0659 AU 25.6 LD 24 km/s
2030-07-19 11:14:00 Merc 0.0632 AU 24.6 LD 23.7 km/s

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

Sources