C/2016 X1 Lemmon
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Comet C/2016 X1 was discovered on 8 December 2016 with Mount Lemmon survey, that is about 2.3 yr before its perihelion passage. Some prediscovery images of this comet were found: taken on 26 November 2016 by Pan-STARRS 1 telescope (Haleakala). This comet was observed until the end of 2019 and is still observable.
Comet had its closest approach to the Earth on 13 January 2019 (6.652 au), about 3.5 months before its perihelion passage.
Solution given here is based on data spanning over 1.39 yr in a range of heliocentric distances from 9.30 au to 8.20 au (18 April 2018).
This is comet with original semimajor likely shorter than 5,000 au.
Comet had its closest approach to the Earth on 13 January 2019 (6.652 au), about 3.5 months before its perihelion passage.
Solution given here is based on data spanning over 1.39 yr in a range of heliocentric distances from 9.30 au to 8.20 au (18 April 2018).
This is comet with original semimajor likely shorter than 5,000 au.
| solution description | ||
|---|---|---|
| number of observations | 105 | |
| data interval | 2016 11 26 – 2018 04 18 | |
| data type | observed only before perihelion (PRE) | |
| data arc selection | entire data set (STD) | |
| range of heliocentric distances | 9.3 au – 8.2au | |
| detectability of NG effects in the comet's motion | NG effects not determinable | |
| type of model of motion | GR - gravitational orbit | |
| data weighting | YES | |
| number of residuals | 192 | |
| RMS [arcseconds] | 0.42 | |
| orbit quality class | 1a | |
| orbital elements (heliocentric ecliptic J2000) | ||
|---|---|---|
| Epoch | 2019 04 27 | |
| perihelion date | 2019 04 29.76613281 | ± 0.02158050 |
| perihelion distance [au] | 7.56409423 | ± 0.00012724 |
| eccentricity | 0.99565788 | ± 0.00003055 |
| argument of perihelion [°] | 224.560312 | ± 0.002097 |
| ascending node [°] | 256.426748 | ± 0.000029 |
| inclination [°] | 26.45596 | ± 0.000078 |
| reciprocal semi-major axis [10-6 au-1] | 574.04 | ± 4.01 |