| Parameter |
Value |
| Designation |
C/2001 C1 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2002-03-28T09:55:55.508160Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:08Z |
| Obs used |
229 |
| NEO |
- |
| M1 |
6.700 |
| K1 |
9.750 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2001-04-12.0000000 |
| e |
0.99987490 |
| q (au) |
5.104333 |
| a (au) |
40802.601593 |
| i (deg) |
68.964525 |
| Ω (om, deg) |
33.716342 |
| ω (w, deg) |
219.949836 |
| M (ma, deg) |
359.999958 |
Magnitude
Scatter + Global Linear
$$
M_a = (8.017 + 2.707\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
8.017 |
| n |
2.707 |
| gf |
0.999 |
| gb |
-0.501 |
| 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
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
02:09:02.58 |
+12:35:50.3 |
HIP 10106 |
21.20 |
| 2026-09-20 12:00 |
02:09:00.41 |
+12:35:41.9 |
HIP 10106 |
21.47 |
| 2026-09-21 00:00 |
02:08:58.23 |
+12:35:33.4 |
HIP 10106 |
21.76 |
| 2026-09-21 12:00 |
02:08:56.04 |
+12:35:24.9 |
HIP 10106 |
22.05 |
| 2026-09-22 00:00 |
02:08:53.83 |
+12:35:16.3 |
HIP 10106 |
22.36 |
| 2026-09-22 12:00 |
02:08:51.61 |
+12:35:07.6 |
HIP 10106 |
22.68 |
| 2026-09-23 00:00 |
02:08:49.37 |
+12:34:58.8 |
HIP 10106 |
23.01 |
| 2026-09-23 12:00 |
02:08:47.13 |
+12:34:50.0 |
HIP 10106 |
23.36 |
| 2026-09-24 00:00 |
02:08:44.86 |
+12:34:41.1 |
HIP 10106 |
23.71 |
| 2026-09-24 12:00 |
02:08:42.59 |
+12:34:32.1 |
HIP 10106 |
24.07 |
| 2026-09-25 00:00 |
02:08:40.30 |
+12:34:23.1 |
HIP 10106 |
24.45 |
| 2026-09-25 12:00 |
02:08:38.00 |
+12:34:14.0 |
HIP 10106 |
24.83 |
| 2026-09-26 00:00 |
02:08:35.69 |
+12:34:04.9 |
HIP 10106 |
25.22 |
| 2026-09-26 12:00 |
02:08:33.37 |
+12:33:55.6 |
HIP 10106 |
25.62 |
| 2026-09-27 00:00 |
02:08:31.03 |
+12:33:46.4 |
HIP 10106 |
26.03 |
| 2026-09-27 12:00 |
02:08:28.68 |
+12:33:37.0 |
HIP 10106 |
26.45 |
| 2026-09-28 00:00 |
02:08:26.32 |
+12:33:27.6 |
HIP 10106 |
26.88 |
| 2026-09-28 12:00 |
02:08:23.94 |
+12:33:18.2 |
HIP 10106 |
27.32 |
| 2026-09-29 00:00 |
02:08:21.56 |
+12:33:08.6 |
HIP 10106 |
27.77 |
| 2026-09-29 12:00 |
02:08:19.16 |
+12:32:59.0 |
HIP 10106 |
28.22 |
| 2026-09-30 00:00 |
02:08:16.76 |
+12:32:49.4 |
HIP 10106 |
28.68 |
| 2026-09-30 12:00 |
02:08:14.34 |
+12:32:39.7 |
HIP 10106 |
29.15 |
| 2026-10-01 00:00 |
02:08:11.91 |
+12:32:29.9 |
HIP 10106 |
29.62 |
| 2026-10-01 12:00 |
02:08:09.47 |
+12:32:20.1 |
HIP 10106 |
30.11 |
| 2026-10-02 00:00 |
02:08:07.02 |
+12:32:10.3 |
HIP 10106 |
30.60 |
| 2026-10-02 12:00 |
02:08:04.56 |
+12:32:00.3 |
HIP 10106 |
31.09 |
| 2026-10-03 00:00 |
02:08:02.09 |
+12:31:50.4 |
HIP 10106 |
31.60 |
| 2026-10-03 12:00 |
02:07:59.61 |
+12:31:40.3 |
HIP 10106 |
32.11 |
| 2026-10-04 00:00 |
02:07:57.12 |
+12:31:30.3 |
HIP 10106 |
32.62 |
| 2026-10-04 12:00 |
02:07:54.62 |
+12:31:20.1 |
HIP 10106 |
33.14 |
| 2026-10-05 00:00 |
02:07:52.11 |
+12:31:10.0 |
HIP 10106 |
33.67 |
| 2026-10-05 12:00 |
02:07:49.59 |
+12:30:59.7 |
HIP 10106 |
34.20 |
| 2026-10-06 00:00 |
02:07:47.06 |
+12:30:49.5 |
HIP 10106 |
34.74 |
| 2026-10-06 12:00 |
02:07:44.52 |
+12:30:39.2 |
HIP 10106 |
35.29 |
| 2026-10-07 00:00 |
02:07:41.97 |
+12:30:28.8 |
HIP 10106 |
35.84 |
| 2026-10-07 12:00 |
02:07:39.42 |
+12:30:18.4 |
HIP 10106 |
36.39 |
| 2026-10-08 00:00 |
02:07:36.86 |
+12:30:07.9 |
HIP 9764 |
36.53 |
| 2026-10-08 12:00 |
02:07:34.29 |
+12:29:57.5 |
HIP 9764 |
35.91 |
| 2026-10-09 00:00 |
02:07:31.71 |
+12:29:46.9 |
HIP 9764 |
35.29 |
| 2026-10-09 12:00 |
02:07:29.12 |
+12:29:36.4 |
HIP 9764 |
34.67 |
| 2026-10-10 00:00 |
02:07:26.53 |
+12:29:25.7 |
HIP 9764 |
34.05 |
| 2026-10-10 12:00 |
02:07:23.93 |
+12:29:15.1 |
HIP 9764 |
33.43 |
| 2026-10-11 00:00 |
02:07:21.32 |
+12:29:04.4 |
HIP 9764 |
32.80 |