| 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) |
| 2026-07-29 00:00 |
02:11:06.78 |
+12:41:40.7 |
HIP 10197 |
22.17 |
| 2026-07-29 12:00 |
02:11:06.72 |
+12:41:43.1 |
HIP 10197 |
22.21 |
| 2026-07-30 00:00 |
02:11:06.64 |
+12:41:45.4 |
HIP 10197 |
22.25 |
| 2026-07-30 12:00 |
02:11:06.54 |
+12:41:47.5 |
HIP 10197 |
22.29 |
| 2026-07-31 00:00 |
02:11:06.41 |
+12:41:49.6 |
HIP 10197 |
22.32 |
| 2026-07-31 12:00 |
02:11:06.26 |
+12:41:51.6 |
HIP 10197 |
22.35 |
| 2026-08-01 00:00 |
02:11:06.10 |
+12:41:53.4 |
HIP 10197 |
22.38 |
| 2026-08-01 12:00 |
02:11:05.90 |
+12:41:55.1 |
HIP 10197 |
22.41 |
| 2026-08-02 00:00 |
02:11:05.69 |
+12:41:56.7 |
HIP 10197 |
22.44 |
| 2026-08-02 12:00 |
02:11:05.45 |
+12:41:58.2 |
HIP 10197 |
22.47 |
| 2026-08-03 00:00 |
02:11:05.20 |
+12:41:59.6 |
HIP 10197 |
22.49 |
| 2026-08-03 12:00 |
02:11:04.92 |
+12:42:00.9 |
HIP 10197 |
22.52 |
| 2026-08-04 00:00 |
02:11:04.61 |
+12:42:02.0 |
HIP 10197 |
22.54 |
| 2026-08-04 12:00 |
02:11:04.29 |
+12:42:03.1 |
HIP 10197 |
22.56 |
| 2026-08-05 00:00 |
02:11:03.94 |
+12:42:04.0 |
HIP 10197 |
22.58 |
| 2026-08-05 12:00 |
02:11:03.57 |
+12:42:04.8 |
HIP 10197 |
22.60 |
| 2026-08-06 00:00 |
02:11:03.18 |
+12:42:05.5 |
HIP 10197 |
22.61 |
| 2026-08-06 12:00 |
02:11:02.77 |
+12:42:06.1 |
HIP 10197 |
22.63 |
| 2026-08-07 00:00 |
02:11:02.33 |
+12:42:06.5 |
HIP 10197 |
22.64 |
| 2026-08-07 12:00 |
02:11:01.87 |
+12:42:06.9 |
HIP 10197 |
22.66 |
| 2026-08-08 00:00 |
02:11:01.39 |
+12:42:07.1 |
HIP 10197 |
22.67 |
| 2026-08-08 12:00 |
02:11:00.89 |
+12:42:07.2 |
HIP 10197 |
22.68 |
| 2026-08-09 00:00 |
02:11:00.36 |
+12:42:07.2 |
HIP 10197 |
22.69 |
| 2026-08-09 12:00 |
02:10:59.81 |
+12:42:07.1 |
HIP 10197 |
22.70 |
| 2026-08-10 00:00 |
02:10:59.24 |
+12:42:06.9 |
HIP 10197 |
22.71 |
| 2026-08-10 12:00 |
02:10:58.65 |
+12:42:06.6 |
HIP 10197 |
22.72 |
| 2026-08-11 00:00 |
02:10:58.03 |
+12:42:06.1 |
HIP 10197 |
22.73 |
| 2026-08-11 12:00 |
02:10:57.40 |
+12:42:05.5 |
HIP 10197 |
22.74 |
| 2026-08-12 00:00 |
02:10:56.74 |
+12:42:04.9 |
HIP 10197 |
22.74 |
| 2026-08-12 12:00 |
02:10:56.06 |
+12:42:04.1 |
HIP 10197 |
22.75 |
| 2026-08-13 00:00 |
02:10:55.35 |
+12:42:03.2 |
HIP 10197 |
22.76 |
| 2026-08-13 12:00 |
02:10:54.63 |
+12:42:02.1 |
HIP 10197 |
22.77 |
| 2026-08-14 00:00 |
02:10:53.88 |
+12:42:01.0 |
HIP 10197 |
22.78 |
| 2026-08-14 12:00 |
02:10:53.11 |
+12:41:59.8 |
HIP 10197 |
22.79 |
| 2026-08-15 00:00 |
02:10:52.32 |
+12:41:58.4 |
HIP 10197 |
22.80 |
| 2026-08-15 12:00 |
02:10:51.50 |
+12:41:56.9 |
HIP 10197 |
22.81 |
| 2026-08-16 00:00 |
02:10:50.67 |
+12:41:55.3 |
HIP 10197 |
22.82 |
| 2026-08-16 12:00 |
02:10:49.81 |
+12:41:53.6 |
HIP 10197 |
22.83 |
| 2026-08-17 00:00 |
02:10:48.93 |
+12:41:51.8 |
HIP 10197 |
22.84 |
| 2026-08-17 12:00 |
02:10:48.03 |
+12:41:49.9 |
HIP 10197 |
22.86 |
| 2026-08-18 00:00 |
02:10:47.11 |
+12:41:47.9 |
HIP 10197 |
22.88 |
| 2026-08-18 12:00 |
02:10:46.17 |
+12:41:45.7 |
HIP 10197 |
22.89 |
| 2026-08-19 00:00 |
02:10:45.20 |
+12:41:43.5 |
HIP 10197 |
22.91 |