| 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) |
| 2026-05-12 00:00 |
03:51:55.93 |
+14:40:51.6 |
HIP 18158 |
22.99 |
| 2026-05-12 12:00 |
03:51:58.77 |
+14:40:57.9 |
HIP 18158 |
22.64 |
| 2026-05-13 00:00 |
03:52:01.62 |
+14:41:04.3 |
HIP 18158 |
22.32 |
| 2026-05-13 12:00 |
03:52:04.47 |
+14:41:10.6 |
HIP 18158 |
22.01 |
| 2026-05-14 00:00 |
03:52:07.32 |
+14:41:16.9 |
HIP 18158 |
21.72 |
| 2026-05-14 12:00 |
03:52:10.18 |
+14:41:23.2 |
HIP 18158 |
21.45 |
| 2026-05-15 00:00 |
03:52:13.04 |
+14:41:29.4 |
HIP 18158 |
21.19 |
| 2026-05-15 12:00 |
03:52:15.90 |
+14:41:35.7 |
HIP 18158 |
20.96 |
| 2026-05-16 00:00 |
03:52:18.76 |
+14:41:41.8 |
HIP 18158 |
20.74 |
| 2026-05-16 12:00 |
03:52:21.62 |
+14:41:48.0 |
HIP 18158 |
20.55 |
| 2026-05-17 00:00 |
03:52:24.49 |
+14:41:54.1 |
HIP 18158 |
20.38 |
| 2026-05-17 12:00 |
03:52:27.36 |
+14:42:00.2 |
HIP 18158 |
20.23 |
| 2026-05-18 00:00 |
03:52:30.23 |
+14:42:06.3 |
HIP 18158 |
20.10 |
| 2026-05-18 12:00 |
03:52:33.10 |
+14:42:12.3 |
HIP 18158 |
20.00 |
| 2026-05-19 00:00 |
03:52:35.97 |
+14:42:18.3 |
HIP 18158 |
19.92 |
| 2026-05-19 12:00 |
03:52:38.85 |
+14:42:24.3 |
HIP 18158 |
19.86 |
| 2026-05-20 00:00 |
03:52:41.72 |
+14:42:30.3 |
HIP 18158 |
19.83 |
| 2026-05-20 12:00 |
03:52:44.59 |
+14:42:36.2 |
HIP 18158 |
19.82 |
| 2026-05-21 00:00 |
03:52:47.47 |
+14:42:42.0 |
HIP 18158 |
19.84 |
| 2026-05-21 12:00 |
03:52:50.34 |
+14:42:47.8 |
HIP 18158 |
19.88 |
| 2026-05-22 00:00 |
03:52:53.21 |
+14:42:53.6 |
HIP 18158 |
19.94 |
| 2026-05-22 12:00 |
03:52:56.09 |
+14:42:59.4 |
HIP 18158 |
20.03 |
| 2026-05-23 00:00 |
03:52:58.96 |
+14:43:05.1 |
HIP 18158 |
20.15 |
| 2026-05-23 12:00 |
03:53:01.83 |
+14:43:10.8 |
HIP 18158 |
20.28 |
| 2026-05-24 00:00 |
03:53:04.70 |
+14:43:16.4 |
HIP 18158 |
20.44 |
| 2026-05-24 12:00 |
03:53:07.57 |
+14:43:22.0 |
HIP 18158 |
20.62 |
| 2026-05-25 00:00 |
03:53:10.44 |
+14:43:27.6 |
HIP 18158 |
20.82 |
| 2026-05-25 12:00 |
03:53:13.31 |
+14:43:33.1 |
HIP 18158 |
21.04 |
| 2026-05-26 00:00 |
03:53:16.18 |
+14:43:38.6 |
HIP 18158 |
21.28 |
| 2026-05-26 12:00 |
03:53:19.04 |
+14:43:44.1 |
HIP 18158 |
21.54 |
| 2026-05-27 00:00 |
03:53:21.90 |
+14:43:49.5 |
HIP 18158 |
21.82 |
| 2026-05-27 12:00 |
03:53:24.76 |
+14:43:54.8 |
HIP 18158 |
22.12 |
| 2026-05-28 00:00 |
03:53:27.62 |
+14:44:00.1 |
HIP 18158 |
22.43 |
| 2026-05-28 12:00 |
03:53:30.47 |
+14:44:05.4 |
HIP 18158 |
22.76 |
| 2026-05-29 00:00 |
03:53:33.32 |
+14:44:10.6 |
HIP 18158 |
23.11 |
| 2026-05-29 12:00 |
03:53:36.17 |
+14:44:15.8 |
HIP 18158 |
23.47 |
| 2026-05-30 00:00 |
03:53:39.02 |
+14:44:21.0 |
HIP 18158 |
23.84 |
| 2026-05-30 12:00 |
03:53:41.86 |
+14:44:26.1 |
HIP 18158 |
24.23 |
| 2026-05-31 00:00 |
03:53:44.70 |
+14:44:31.1 |
HIP 18158 |
24.63 |
| 2026-05-31 12:00 |
03:53:47.54 |
+14:44:36.1 |
HIP 18158 |
25.04 |
| 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 |