Swift

Orbital elements

Semi-major axis

-117.334 AU

Eccentricity

1.0086

Inclination

77.16°

Perihelion

1.01 AU

Longitude of ascending node

347.73°

Argument of periapsis

116.77°

Epoch · J2000

JD 2406736.82855 (perihelion)

Orbit class · HYP

Hyperbolic comet

Earth MOID · 129.5 LD

0.3328 AU

Tisserand (Jupiter)

0.287

Orbit quality

Observations used

9

Data arc

32 days

First observed

15 April 1877

Last observed

17 May 1877

Residual RMS

0.81 ″

Solution · Otto Matic

15 April 2021

Discovery & classification

Also known as 1877 G2