2004 UP10 is a Trojan asteroid of Neptune, and one of only two known. (The other is 2001 QR322.) It has the same orbital period as Neptune and orbits at the L4 Lagrangian point about 60 degrees ahead of Neptune. Image of the Trojan asteroids in front of and behind Jupiter along its orbital path. ... Atmospheric characteristics Surface pressure ≫100 MPa Hydrogen - H2 80% ±3. ... 2001 QR322 (also written 2001 QR322) is an asteroid discovered in 2001 that is one of the two currently known Trojan asteroid of Neptune (the other is 2004 UP10). ... Atmospheric characteristics Surface pressure ≫100 MPa Hydrogen - H2 80% ±3. ... The Lagrangian points, (also Lagrange point, L-point, or libration point) are the five positions in space where a small object can be stationary with respect to two larger objects (such as a satellite with respect to the Earth and Moon). ...