| 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) |
| 2026-09-20 00:00 |
06:23:51.47 |
-01:53:23.4 |
HIP 30326 |
24.97 |
| 2026-09-20 12:00 |
06:23:51.92 |
-01:53:39.9 |
HIP 30326 |
24.85 |
| 2026-09-21 00:00 |
06:23:52.34 |
-01:53:56.3 |
HIP 30326 |
24.73 |
| 2026-09-21 12:00 |
06:23:52.74 |
-01:54:12.7 |
HIP 30326 |
24.60 |
| 2026-09-22 00:00 |
06:23:53.12 |
-01:54:29.2 |
HIP 30326 |
24.47 |
| 2026-09-22 12:00 |
06:23:53.48 |
-01:54:45.6 |
HIP 30326 |
24.34 |
| 2026-09-23 00:00 |
06:23:53.82 |
-01:55:02.1 |
HIP 30326 |
24.22 |
| 2026-09-23 12:00 |
06:23:54.14 |
-01:55:18.6 |
HIP 30326 |
24.08 |
| 2026-09-24 00:00 |
06:23:54.43 |
-01:55:35.0 |
HIP 30326 |
23.95 |
| 2026-09-24 12:00 |
06:23:54.70 |
-01:55:51.5 |
HIP 30326 |
23.82 |
| 2026-09-25 00:00 |
06:23:54.96 |
-01:56:08.0 |
HIP 30326 |
23.68 |
| 2026-09-25 12:00 |
06:23:55.19 |
-01:56:24.5 |
HIP 30326 |
23.55 |
| 2026-09-26 00:00 |
06:23:55.40 |
-01:56:40.9 |
HIP 30326 |
23.41 |
| 2026-09-26 12:00 |
06:23:55.58 |
-01:56:57.4 |
HIP 30326 |
23.27 |
| 2026-09-27 00:00 |
06:23:55.75 |
-01:57:13.9 |
HIP 30326 |
23.13 |
| 2026-09-27 12:00 |
06:23:55.89 |
-01:57:30.4 |
HIP 30326 |
22.99 |
| 2026-09-28 00:00 |
06:23:56.02 |
-01:57:46.8 |
HIP 30326 |
22.84 |
| 2026-09-28 12:00 |
06:23:56.12 |
-01:58:03.3 |
HIP 30326 |
22.70 |
| 2026-09-29 00:00 |
06:23:56.20 |
-01:58:19.8 |
HIP 30326 |
22.55 |
| 2026-09-29 12:00 |
06:23:56.25 |
-01:58:36.2 |
HIP 30326 |
22.40 |
| 2026-09-30 00:00 |
06:23:56.29 |
-01:58:52.7 |
HIP 30326 |
22.25 |
| 2026-09-30 12:00 |
06:23:56.30 |
-01:59:09.1 |
HIP 30326 |
22.09 |
| 2026-10-01 00:00 |
06:23:56.30 |
-01:59:25.5 |
HIP 30326 |
21.94 |
| 2026-10-01 12:00 |
06:23:56.27 |
-01:59:41.9 |
HIP 30326 |
21.78 |
| 2026-10-02 00:00 |
06:23:56.22 |
-01:59:58.3 |
HIP 30326 |
21.62 |
| 2026-10-02 12:00 |
06:23:56.14 |
-02:00:14.7 |
HIP 30326 |
21.46 |
| 2026-10-03 00:00 |
06:23:56.05 |
-02:00:31.1 |
HIP 30326 |
21.29 |
| 2026-10-03 12:00 |
06:23:55.93 |
-02:00:47.4 |
HIP 30326 |
21.12 |
| 2026-10-04 00:00 |
06:23:55.79 |
-02:01:03.8 |
HIP 30326 |
20.95 |
| 2026-10-04 12:00 |
06:23:55.63 |
-02:01:20.1 |
HIP 30326 |
20.78 |
| 2026-10-05 00:00 |
06:23:55.45 |
-02:01:36.4 |
HIP 30326 |
20.61 |
| 2026-10-05 12:00 |
06:23:55.24 |
-02:01:52.7 |
HIP 30326 |
20.43 |
| 2026-10-06 00:00 |
06:23:55.02 |
-02:02:08.9 |
HIP 30326 |
20.25 |
| 2026-10-06 12:00 |
06:23:54.77 |
-02:02:25.1 |
HIP 30326 |
20.07 |
| 2026-10-07 00:00 |
06:23:54.50 |
-02:02:41.3 |
HIP 30326 |
19.89 |
| 2026-10-07 12:00 |
06:23:54.21 |
-02:02:57.5 |
HIP 30326 |
19.70 |
| 2026-10-08 00:00 |
06:23:53.89 |
-02:03:13.6 |
HIP 30326 |
19.51 |
| 2026-10-08 12:00 |
06:23:53.56 |
-02:03:29.8 |
HIP 30326 |
19.32 |
| 2026-10-09 00:00 |
06:23:53.20 |
-02:03:45.8 |
HIP 30326 |
19.13 |
| 2026-10-09 12:00 |
06:23:52.82 |
-02:04:01.9 |
HIP 30326 |
18.93 |
| 2026-10-10 00:00 |
06:23:52.42 |
-02:04:17.9 |
HIP 30326 |
18.73 |
| 2026-10-10 12:00 |
06:23:52.00 |
-02:04:33.9 |
HIP 30326 |
18.53 |
| 2026-10-11 00:00 |
06:23:51.55 |
-02:04:49.8 |
HIP 30326 |
18.33 |