| Parameter |
Value |
| Designation |
C/2001 K5 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2002-10-11T17:47:00.801600Z |
| Orbit solution date (soln_date, UTC) |
2025-08-07T09:12:14Z |
| Obs used |
3292 |
| NEO |
- |
| M1 |
5.900 |
| K1 |
8.000 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2003-01-31.0000000 |
| e |
0.99953401 |
| q (au) |
5.184239 |
| a (au) |
11125.172368 |
| i (deg) |
72.590404 |
| Ω (om, deg) |
237.457730 |
| ω (w, deg) |
47.054253 |
| M (ma, deg) |
0.000093 |
Magnitude
Scatter + Global Linear
$$
M_a = (0.479 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
0.479 |
| n |
6.000 |
| gf |
0.890 |
| gb |
-0.500 |
| k |
0.937 |
| δ90 |
3.269 |
| 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 |
| 2001-04-30 |
2002-10-11 |
+9.4650 |
-7.250 |
| 2002-10-11 |
2005-01-02 |
+4.3531 |
-3.239 |
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 |
03:53:50.37 |
+14:44:41.1 |
HIP 18158 |
25.46 |
| 2026-06-01 12:00 |
03:53:53.20 |
+14:44:46.0 |
HIP 18158 |
25.90 |
| 2026-06-02 00:00 |
03:53:56.02 |
+14:44:50.9 |
HIP 18228 |
26.28 |
| 2026-06-02 12:00 |
03:53:58.84 |
+14:44:55.7 |
HIP 18228 |
26.26 |
| 2026-06-03 00:00 |
03:54:01.66 |
+14:45:00.4 |
HIP 18228 |
26.25 |
| 2026-06-03 12:00 |
03:54:04.47 |
+14:45:05.2 |
HIP 18228 |
26.26 |
| 2026-06-04 00:00 |
03:54:07.28 |
+14:45:09.8 |
HIP 18228 |
26.29 |
| 2026-06-04 12:00 |
03:54:10.08 |
+14:45:14.5 |
HIP 18228 |
26.34 |
| 2026-06-05 00:00 |
03:54:12.88 |
+14:45:19.0 |
HIP 18228 |
26.40 |
| 2026-06-05 12:00 |
03:54:15.67 |
+14:45:23.6 |
HIP 18228 |
26.49 |
| 2026-06-06 00:00 |
03:54:18.45 |
+14:45:28.0 |
HIP 18228 |
26.59 |
| 2026-06-06 12:00 |
03:54:21.24 |
+14:45:32.4 |
HIP 18228 |
26.71 |
| 2026-06-07 00:00 |
03:54:24.01 |
+14:45:36.8 |
HIP 18228 |
26.84 |
| 2026-06-07 12:00 |
03:54:26.78 |
+14:45:41.1 |
HIP 18228 |
27.00 |
| 2026-06-08 00:00 |
03:54:29.54 |
+14:45:45.4 |
HIP 18228 |
27.16 |
| 2026-06-08 12:00 |
03:54:32.30 |
+14:45:49.6 |
HIP 18228 |
27.35 |
| 2026-06-09 00:00 |
03:54:35.05 |
+14:45:53.8 |
HIP 18228 |
27.55 |
| 2026-06-09 12:00 |
03:54:37.79 |
+14:45:57.9 |
HIP 18228 |
27.76 |
| 2026-06-10 00:00 |
03:54:40.53 |
+14:46:01.9 |
HIP 18228 |
27.99 |
| 2026-06-10 12:00 |
03:54:43.26 |
+14:46:05.9 |
HIP 18228 |
28.23 |
| 2026-06-11 00:00 |
03:54:45.98 |
+14:46:09.8 |
HIP 18228 |
28.49 |
| 2026-06-11 12:00 |
03:54:48.70 |
+14:46:13.7 |
HIP 18228 |
28.75 |
| 2026-06-12 00:00 |
03:54:51.41 |
+14:46:17.5 |
HIP 18228 |
29.03 |
| 2026-06-12 12:00 |
03:54:54.11 |
+14:46:21.3 |
HIP 18228 |
29.33 |
| 2026-06-13 00:00 |
03:54:56.80 |
+14:46:25.0 |
HIP 18228 |
29.63 |
| 2026-06-13 12:00 |
03:54:59.49 |
+14:46:28.6 |
HIP 18228 |
29.94 |
| 2026-06-14 00:00 |
03:55:02.16 |
+14:46:32.2 |
HIP 18228 |
30.27 |
| 2026-06-14 12:00 |
03:55:04.83 |
+14:46:35.7 |
HIP 18228 |
30.60 |
| 2026-06-15 00:00 |
03:55:07.49 |
+14:46:39.2 |
HIP 18228 |
30.95 |
| 2026-06-15 12:00 |
03:55:10.14 |
+14:46:42.6 |
HIP 18228 |
31.30 |
| 2026-06-16 00:00 |
03:55:12.78 |
+14:46:46.0 |
HIP 18228 |
31.66 |
| 2026-06-16 12:00 |
03:55:15.41 |
+14:46:49.2 |
HIP 18228 |
32.03 |
| 2026-06-17 00:00 |
03:55:18.04 |
+14:46:52.5 |
HIP 18228 |
32.41 |
| 2026-06-17 12:00 |
03:55:20.65 |
+14:46:55.6 |
HIP 18228 |
32.79 |
| 2026-06-18 00:00 |
03:55:23.25 |
+14:46:58.7 |
HIP 18228 |
33.19 |
| 2026-06-18 12:00 |
03:55:25.85 |
+14:47:01.7 |
HIP 18228 |
33.58 |
| 2026-06-19 00:00 |
03:55:28.43 |
+14:47:04.7 |
HIP 18228 |
33.99 |
| 2026-06-19 12:00 |
03:55:31.00 |
+14:47:07.6 |
HIP 18228 |
34.40 |
| 2026-06-20 00:00 |
03:55:33.57 |
+14:47:10.5 |
HIP 18228 |
34.81 |
| 2026-06-20 12:00 |
03:55:36.12 |
+14:47:13.2 |
HIP 18228 |
35.23 |
| 2026-06-21 00:00 |
03:55:38.66 |
+14:47:16.0 |
HIP 18228 |
35.65 |
| 2026-06-21 12:00 |
03:55:41.19 |
+14:47:18.6 |
HIP 18228 |
36.08 |
| 2026-06-22 00:00 |
03:55:43.71 |
+14:47:21.2 |
HIP 18228 |
36.51 |