| Parameter |
Value |
| Designation |
C/2000 K2 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2000-10-11T08:50:10.268160Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:04Z |
| Obs used |
315 |
| NEO |
- |
| M1 |
12.400 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2001-01-24.0000000 |
| e |
0.99533458 |
| q (au) |
2.437066 |
| a (au) |
522.368250 |
| i (deg) |
25.633558 |
| Ω (om, deg) |
195.261038 |
| ω (w, deg) |
106.826472 |
| M (ma, deg) |
0.008638 |
Magnitude
Scatter + Global Linear
$$
M_a = (11.118 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
11.118 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.947 |
| k |
1.000 |
| δ90 |
10.000 |
| Parameter |
Symbol |
Range |
Description |
| Absolute magnitude at 1 AU from Sun and Earth |
H0 |
-5 to 20 |
Intrinsic brightness of the comet |
| Photometric slope parameter |
n |
2 to 6 |
Rate of brightness change with heliocentric distance |
| Forward scattering asymmetry factor |
gf |
0.8 to 1 |
Degree of forward scattering |
| Backward scattering asymmetry factor |
gb |
-1 to -0.5 |
Degree of backward scattering |
| Partitioning coefficient |
k |
0.8 to 1 |
Ratio between forward/backward scattering contributions |
| Dust-to-gas brightness ratio |
δ90 |
1 to 10 |
Relative contribution of dust scattering to gas emission |
Reference: EPSC-DPS2025-160
Residuals (Piecewise)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| Start (UTC) |
End (UTC) |
a |
b |
| 2000-05-04 |
2000-10-07 |
+29.0488 |
-11.898 |
| 2000-10-14 |
2003-01-16 |
+4.6075 |
-3.437 |
log10 r = log10(heliocentric distance / AU), Δ = geocentric distance (AU)
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
06:16:28.83 |
-01:24:48.6 |
HIP 29706 |
15.52 |
| 2026-06-01 12:00 |
06:16:31.23 |
-01:24:43.5 |
HIP 29706 |
16.11 |
| 2026-06-02 00:00 |
06:16:33.64 |
-01:24:38.4 |
HIP 29706 |
16.71 |
| 2026-06-02 12:00 |
06:16:36.06 |
-01:24:33.5 |
HIP 29706 |
17.31 |
| 2026-06-03 00:00 |
06:16:38.48 |
-01:24:28.6 |
HIP 29706 |
17.92 |
| 2026-06-03 12:00 |
06:16:40.91 |
-01:24:24.0 |
HIP 29706 |
18.52 |
| 2026-06-04 00:00 |
06:16:43.35 |
-01:24:19.4 |
HIP 29706 |
19.13 |
| 2026-06-04 12:00 |
06:16:45.79 |
-01:24:15.0 |
HIP 29706 |
19.74 |
| 2026-06-05 00:00 |
06:16:48.24 |
-01:24:10.7 |
HIP 29706 |
20.35 |
| 2026-06-05 12:00 |
06:16:50.70 |
-01:24:06.5 |
HIP 29706 |
20.96 |
| 2026-06-06 00:00 |
06:16:53.17 |
-01:24:02.5 |
HIP 29706 |
21.58 |
| 2026-06-06 12:00 |
06:16:55.64 |
-01:23:58.5 |
HIP 29706 |
22.20 |
| 2026-06-07 00:00 |
06:16:58.11 |
-01:23:54.7 |
HIP 29706 |
22.82 |
| 2026-06-07 12:00 |
06:17:00.60 |
-01:23:51.1 |
HIP 29706 |
23.44 |
| 2026-06-08 00:00 |
06:17:03.09 |
-01:23:47.5 |
HIP 29706 |
24.06 |
| 2026-06-08 12:00 |
06:17:05.58 |
-01:23:44.1 |
HIP 29706 |
24.68 |
| 2026-06-09 00:00 |
06:17:08.08 |
-01:23:40.9 |
HIP 29961 |
25.12 |
| 2026-06-09 12:00 |
06:17:10.59 |
-01:23:37.7 |
HIP 29961 |
24.60 |
| 2026-06-10 00:00 |
06:17:13.10 |
-01:23:34.7 |
HIP 29961 |
24.09 |
| 2026-06-10 12:00 |
06:17:15.62 |
-01:23:31.8 |
HIP 29961 |
23.59 |
| 2026-06-11 00:00 |
06:17:18.14 |
-01:23:29.1 |
HIP 29961 |
23.09 |
| 2026-06-11 12:00 |
06:17:20.67 |
-01:23:26.5 |
HIP 29961 |
22.60 |
| 2026-06-12 00:00 |
06:17:23.20 |
-01:23:24.0 |
HIP 29961 |
22.12 |
| 2026-06-12 12:00 |
06:17:25.74 |
-01:23:21.6 |
HIP 29961 |
21.65 |
| 2026-06-13 00:00 |
06:17:28.28 |
-01:23:19.4 |
HIP 29961 |
21.19 |
| 2026-06-13 12:00 |
06:17:30.82 |
-01:23:17.3 |
HIP 29961 |
20.73 |
| 2026-06-14 00:00 |
06:17:33.37 |
-01:23:15.3 |
HIP 29961 |
20.29 |
| 2026-06-14 12:00 |
06:17:35.92 |
-01:23:13.5 |
HIP 29961 |
19.86 |
| 2026-06-15 00:00 |
06:17:38.48 |
-01:23:11.8 |
HIP 29961 |
19.44 |
| 2026-06-15 12:00 |
06:17:41.04 |
-01:23:10.2 |
HIP 29961 |
19.04 |
| 2026-06-16 00:00 |
06:17:43.60 |
-01:23:08.8 |
HIP 29961 |
18.65 |
| 2026-06-16 12:00 |
06:17:46.17 |
-01:23:07.5 |
HIP 29961 |
18.28 |
| 2026-06-17 00:00 |
06:17:48.74 |
-01:23:06.3 |
HIP 29961 |
17.92 |
| 2026-06-17 12:00 |
06:17:51.31 |
-01:23:05.3 |
HIP 29961 |
17.58 |
| 2026-06-18 00:00 |
06:17:53.89 |
-01:23:04.4 |
HIP 29961 |
17.26 |
| 2026-06-18 12:00 |
06:17:56.46 |
-01:23:03.6 |
HIP 29961 |
16.96 |
| 2026-06-19 00:00 |
06:17:59.04 |
-01:23:02.9 |
HIP 29961 |
16.68 |
| 2026-06-19 12:00 |
06:18:01.63 |
-01:23:02.4 |
HIP 29961 |
16.42 |
| 2026-06-20 00:00 |
06:18:04.21 |
-01:23:02.1 |
HIP 30027 |
15.96 |
| 2026-06-20 12:00 |
06:18:06.79 |
-01:23:01.8 |
HIP 30027 |
15.32 |
| 2026-06-21 00:00 |
06:18:09.38 |
-01:23:01.7 |
HIP 30027 |
14.67 |
| 2026-06-21 12:00 |
06:18:11.97 |
-01:23:01.7 |
HIP 30027 |
14.03 |
| 2026-06-22 00:00 |
06:18:14.56 |
-01:23:01.9 |
HIP 30027 |
13.38 |