C/2001 K5 (LINEAR)
| 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) |
| 2026-02-03 00:00 |
03:47:08.37 |
+14:26:12.1 |
HIP 17726 |
9.86 |
| 2026-02-03 12:00 |
03:47:07.71 |
+14:26:10.7 |
HIP 17726 |
9.99 |
| 2026-02-04 00:00 |
03:47:07.09 |
+14:26:09.4 |
HIP 17726 |
10.12 |
| 2026-02-04 12:00 |
03:47:06.48 |
+14:26:08.3 |
HIP 17726 |
10.24 |
| 2026-02-05 00:00 |
03:47:05.91 |
+14:26:07.2 |
HIP 17726 |
10.35 |
| 2026-02-05 12:00 |
03:47:05.35 |
+14:26:06.2 |
HIP 17726 |
10.47 |
| 2026-02-06 00:00 |
03:47:04.83 |
+14:26:05.3 |
HIP 17726 |
10.58 |
| 2026-02-06 12:00 |
03:47:04.32 |
+14:26:04.5 |
HIP 17726 |
10.68 |
| 2026-02-07 00:00 |
03:47:03.85 |
+14:26:03.8 |
HIP 17726 |
10.78 |
| 2026-02-07 12:00 |
03:47:03.40 |
+14:26:03.1 |
HIP 17726 |
10.88 |
| 2026-02-08 00:00 |
03:47:02.97 |
+14:26:02.6 |
HIP 17726 |
10.97 |
| 2026-02-08 12:00 |
03:47:02.57 |
+14:26:02.1 |
HIP 17726 |
11.05 |
| 2026-02-09 00:00 |
03:47:02.19 |
+14:26:01.7 |
HIP 17726 |
11.13 |
| 2026-02-09 12:00 |
03:47:01.84 |
+14:26:01.5 |
HIP 17726 |
11.21 |
| 2026-02-10 00:00 |
03:47:01.52 |
+14:26:01.3 |
HIP 17726 |
11.28 |
| 2026-02-10 12:00 |
03:47:01.22 |
+14:26:01.2 |
HIP 17726 |
11.35 |
| 2026-02-11 00:00 |
03:47:00.95 |
+14:26:01.1 |
HIP 17726 |
11.41 |
| 2026-02-11 12:00 |
03:47:00.70 |
+14:26:01.2 |
HIP 17726 |
11.46 |
| 2026-02-12 00:00 |
03:47:00.48 |
+14:26:01.3 |
HIP 17726 |
11.51 |
| 2026-02-12 12:00 |
03:47:00.28 |
+14:26:01.6 |
HIP 17726 |
11.56 |
| 2026-02-13 00:00 |
03:47:00.11 |
+14:26:01.9 |
HIP 17726 |
11.60 |
| 2026-02-13 12:00 |
03:46:59.96 |
+14:26:02.3 |
HIP 17726 |
11.64 |
| 2026-02-14 00:00 |
03:46:59.84 |
+14:26:02.8 |
HIP 17726 |
11.67 |
| 2026-02-14 12:00 |
03:46:59.74 |
+14:26:03.4 |
HIP 17726 |
11.69 |
| 2026-02-15 00:00 |
03:46:59.67 |
+14:26:04.0 |
HIP 17726 |
11.71 |
| 2026-02-15 12:00 |
03:46:59.63 |
+14:26:04.8 |
HIP 17726 |
11.73 |
| 2026-02-16 00:00 |
03:46:59.61 |
+14:26:05.6 |
HIP 17726 |
11.74 |
| 2026-02-16 12:00 |
03:46:59.62 |
+14:26:06.5 |
HIP 17726 |
11.74 |
| 2026-02-17 00:00 |
03:46:59.65 |
+14:26:07.5 |
HIP 17726 |
11.74 |
| 2026-02-17 12:00 |
03:46:59.71 |
+14:26:08.6 |
HIP 17726 |
11.73 |
| 2026-02-18 00:00 |
03:46:59.79 |
+14:26:09.8 |
HIP 17726 |
11.72 |
| 2026-02-18 12:00 |
03:46:59.90 |
+14:26:11.0 |
HIP 17726 |
11.71 |
| 2026-02-19 00:00 |
03:47:00.03 |
+14:26:12.3 |
HIP 17726 |
11.68 |
| 2026-02-19 12:00 |
03:47:00.19 |
+14:26:13.7 |
HIP 17726 |
11.66 |
| 2026-02-20 00:00 |
03:47:00.37 |
+14:26:15.2 |
HIP 17726 |
11.63 |
| 2026-02-20 12:00 |
03:47:00.58 |
+14:26:16.8 |
HIP 17726 |
11.59 |
| 2026-02-21 00:00 |
03:47:00.82 |
+14:26:18.4 |
HIP 17726 |
11.55 |
| 2026-02-21 12:00 |
03:47:01.08 |
+14:26:20.1 |
HIP 17726 |
11.50 |
| 2026-02-22 00:00 |
03:47:01.37 |
+14:26:21.9 |
HIP 17726 |
11.45 |
| 2026-02-22 12:00 |
03:47:01.68 |
+14:26:23.8 |
HIP 17726 |
11.40 |
| 2026-02-23 00:00 |
03:47:02.01 |
+14:26:25.8 |
HIP 17726 |
11.34 |
| 2026-02-23 12:00 |
03:47:02.37 |
+14:26:27.8 |
HIP 17726 |
11.27 |
| 2026-02-24 00:00 |
03:47:02.76 |
+14:26:29.9 |
HIP 17726 |
11.21 |