C/2001 B1 (LINEAR)
| Parameter |
Value |
| Designation |
C/2001 B1 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2000-09-19T09:58:55.704000Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:08Z |
| Obs used |
167 |
| NEO |
- |
| M1 |
12.500 |
| K1 |
4.750 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2001-07-30.0000000 |
| e |
1.00122950 |
| q (au) |
2.928437 |
| a (au) |
-2381.818640 |
| i (deg) |
104.111145 |
| Ω (om, deg) |
49.841263 |
| ω (w, deg) |
284.848753 |
| M (ma, deg) |
0.002659 |
Magnitude
Scatter + Global Linear
$$
M_a = (13.343 + 2.688\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
13.343 |
| n |
2.688 |
| gf |
1.000 |
| gb |
-0.669 |
| k |
0.800 |
| 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) |
| 2026-02-03 00:00 |
21:02:02.86 |
+60:05:10.9 |
HIP 104034 |
21.59 |
| 2026-02-03 12:00 |
21:02:07.59 |
+60:05:13.5 |
HIP 104034 |
21.06 |
| 2026-02-04 00:00 |
21:02:12.33 |
+60:05:16.5 |
HIP 104034 |
20.52 |
| 2026-02-04 12:00 |
21:02:17.06 |
+60:05:19.7 |
HIP 104034 |
19.98 |
| 2026-02-05 00:00 |
21:02:21.80 |
+60:05:23.3 |
HIP 104034 |
19.44 |
| 2026-02-05 12:00 |
21:02:26.53 |
+60:05:27.2 |
HIP 104034 |
18.91 |
| 2026-02-06 00:00 |
21:02:31.26 |
+60:05:31.5 |
HIP 104034 |
18.37 |
| 2026-02-06 12:00 |
21:02:35.98 |
+60:05:36.0 |
HIP 104034 |
17.84 |
| 2026-02-07 00:00 |
21:02:40.70 |
+60:05:40.9 |
HIP 104034 |
17.30 |
| 2026-02-07 12:00 |
21:02:45.42 |
+60:05:46.0 |
HIP 104034 |
16.77 |
| 2026-02-08 00:00 |
21:02:50.13 |
+60:05:51.5 |
HIP 104034 |
16.24 |
| 2026-02-08 12:00 |
21:02:54.84 |
+60:05:57.4 |
HIP 104034 |
15.71 |
| 2026-02-09 00:00 |
21:02:59.54 |
+60:06:03.5 |
HIP 104034 |
15.19 |
| 2026-02-09 12:00 |
21:03:04.24 |
+60:06:09.9 |
HIP 104034 |
14.66 |
| 2026-02-10 00:00 |
21:03:08.94 |
+60:06:16.7 |
HIP 104034 |
14.14 |
| 2026-02-10 12:00 |
21:03:13.62 |
+60:06:23.8 |
HIP 104034 |
13.62 |
| 2026-02-11 00:00 |
21:03:18.31 |
+60:06:31.1 |
HIP 104034 |
13.11 |
| 2026-02-11 12:00 |
21:03:22.98 |
+60:06:38.8 |
HIP 104034 |
12.59 |
| 2026-02-12 00:00 |
21:03:27.65 |
+60:06:46.9 |
HIP 104034 |
12.09 |
| 2026-02-12 12:00 |
21:03:32.31 |
+60:06:55.2 |
HIP 104034 |
11.59 |
| 2026-02-13 00:00 |
21:03:36.96 |
+60:07:03.8 |
HIP 104034 |
11.09 |
| 2026-02-13 12:00 |
21:03:41.61 |
+60:07:12.8 |
HIP 104034 |
10.60 |
| 2026-02-14 00:00 |
21:03:46.25 |
+60:07:22.0 |
HIP 104034 |
10.12 |
| 2026-02-14 12:00 |
21:03:50.88 |
+60:07:31.6 |
HIP 104034 |
9.65 |
| 2026-02-15 00:00 |
21:03:55.50 |
+60:07:41.5 |
HIP 104034 |
9.20 |
| 2026-02-15 12:00 |
21:04:00.11 |
+60:07:51.6 |
HIP 104034 |
8.75 |
| 2026-02-16 00:00 |
21:04:04.71 |
+60:08:02.1 |
HIP 104034 |
8.32 |
| 2026-02-16 12:00 |
21:04:09.30 |
+60:08:12.9 |
HIP 104034 |
7.90 |
| 2026-02-17 00:00 |
21:04:13.88 |
+60:08:24.0 |
HIP 104034 |
7.51 |
| 2026-02-17 12:00 |
21:04:18.45 |
+60:08:35.4 |
HIP 104034 |
7.14 |
| 2026-02-18 00:00 |
21:04:23.01 |
+60:08:47.1 |
HIP 104034 |
6.80 |
| 2026-02-18 12:00 |
21:04:27.56 |
+60:08:59.1 |
HIP 104034 |
6.50 |
| 2026-02-19 00:00 |
21:04:32.10 |
+60:09:11.5 |
HIP 104034 |
6.23 |
| 2026-02-19 12:00 |
21:04:36.62 |
+60:09:24.1 |
HIP 104034 |
6.00 |
| 2026-02-20 00:00 |
21:04:41.13 |
+60:09:37.0 |
HIP 104034 |
5.82 |
| 2026-02-20 12:00 |
21:04:45.63 |
+60:09:50.2 |
HIP 104034 |
5.69 |
| 2026-02-21 00:00 |
21:04:50.12 |
+60:10:03.7 |
HIP 104034 |
5.62 |
| 2026-02-21 12:00 |
21:04:54.59 |
+60:10:17.5 |
HIP 104034 |
5.61 |
| 2026-02-22 00:00 |
21:04:59.05 |
+60:10:31.6 |
HIP 104034 |
5.66 |
| 2026-02-22 12:00 |
21:05:03.49 |
+60:10:45.9 |
HIP 104034 |
5.77 |
| 2026-02-23 00:00 |
21:05:07.92 |
+60:11:00.6 |
HIP 104034 |
5.93 |
| 2026-02-23 12:00 |
21:05:12.34 |
+60:11:15.6 |
HIP 104034 |
6.14 |
| 2026-02-24 00:00 |
21:05:16.74 |
+60:11:30.8 |
HIP 104034 |
6.39 |