Where is it now
- Distance from Sun
- 1.413 AU
- True anomaly
- 144.9°
- Distance from Earth
- 1.001 AU
- As of
- 11 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.
In the sky
- Right ascension
- 09h 23m 42s
- Declination
- +76° 57′ 22″
- Constellation
- Camelopardalis
- Distance from Earth
- 1 AU
- Elongation from the Sun
- 90.17° — 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.
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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
- 1.186 AU
- Eccentricity
- 0.2721
- Inclination
- 38.49°
- Orbital period
- 471.9 days
- Perihelion
- 0.864 AU
- Aphelion
- 1.509 AU
- Longitude of ascending node
- 294.96°
- Argument of periapsis
- 322.9°
- Epoch · J2000
- 2461200.5
- Orbit class · APO
- Apollo
- Earth MOID · 43.4 LD
- 0.1114 AU
- Tisserand (Jupiter)
- 5.106
Orbit quality
Orbit very well determined (uncertainty code 0).
- Observations used
- 3,788
- Data arc
- 35.73 years
- First observed
- 12 January 1991
- Last observed
- 7 October 2026
- Residual RMS
- 0.42 ″
- Solution · Otto Matic
- 8 October 2026
Physical properties
- Rotation period
- 3.48 hours
Visual & observation
- Absolute magnitude (H)
- 16.02
- Spectral type (SMASS)
- Sr
Discovery & classification
- Discovered by
- Mueller, J. E.
- Discovery date
- 19 January 1991
- Discovery site
- Palomar
Tukmit is Father Sky in the Luiseno creation story. He was made from nothingness and together with Tomaiyavit bore the First People. The First People became all the people, animals, plants and inanimate objects of the earth, the basis of Luiseno existence.
Also known as 12711 · 1991 BB
Close approaches 15 on record
Top-down view of the ecliptic, Earth at the centre, for the 2053-07-19 13:16 UTC close approach of Tukmit. Catalogue miss distance 43.2 LD · 1.66 × 10⁷ km. The curve is the geocentric path from 2053-07-16 to 2053-07-22, 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. The path is a geocentric ecliptic ephemeris from JPL Horizons. The inset is a heliocentric view and is approximate.
| When (UTC) | Body | Distance | Lunar distances | Relative speed |
|---|---|---|---|---|
| 2053-07-19 13:16:00 | Earth | 0.111 AU | 43.2 LD | 22.1 km/s |
| 2084-07-24 02:32:00 | Earth | 0.1317 AU | 51.2 LD | 22.6 km/s |
| 2106-07-14 02:31:00 | Earth | 0.1522 AU | 59.3 LD | 21.7 km/s |
| 2115-07-31 15:58:00 | Earth | 0.1957 AU | 76.2 LD | 23.6 km/s |
| 2137-07-19 23:36:00 | Earth | 0.1114 AU | 43.4 LD | 22 km/s |
| 2168-07-25 10:25:00 | Earth | 0.1318 AU | 51.3 LD | 22.6 km/s |
| 2190-07-14 07:38:00 | Earth | 0.1525 AU | 59.4 LD | 21.7 km/s |
| 2199-07-31 15:39:00 | Earth | 0.192 AU | 74.7 LD | 23.5 km/s |
Next ten from today. 1 lunar distance = 384,400 km. Source: JPL close-approach data.
Sources
- visual properties: JPL SBDB (lookup)
- physical properties: JPL SBDB (lookup)
- visual properties: JPL SBDB (lookup)
- orbital elements: JPL SBDB