| 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) |
| 2026-05-12 00:00 |
21:10:55.89 |
+61:29:15.2 |
HIP 104807 |
24.41 |
| 2026-05-12 12:00 |
21:10:55.14 |
+61:29:51.5 |
HIP 104807 |
24.24 |
| 2026-05-13 00:00 |
21:10:54.34 |
+61:30:27.7 |
HIP 104807 |
24.09 |
| 2026-05-13 12:00 |
21:10:53.50 |
+61:31:03.9 |
HIP 104807 |
23.95 |
| 2026-05-14 00:00 |
21:10:52.62 |
+61:31:40.1 |
HIP 104807 |
23.84 |
| 2026-05-14 12:00 |
21:10:51.69 |
+61:32:16.1 |
HIP 104807 |
23.74 |
| 2026-05-15 00:00 |
21:10:50.73 |
+61:32:52.1 |
HIP 104807 |
23.67 |
| 2026-05-15 12:00 |
21:10:49.71 |
+61:33:28.1 |
HIP 104807 |
23.62 |
| 2026-05-16 00:00 |
21:10:48.66 |
+61:34:04.0 |
HIP 104807 |
23.59 |
| 2026-05-16 12:00 |
21:10:47.56 |
+61:34:39.8 |
HIP 104807 |
23.58 |
| 2026-05-17 00:00 |
21:10:46.41 |
+61:35:15.5 |
HIP 104807 |
23.59 |
| 2026-05-17 12:00 |
21:10:45.23 |
+61:35:51.2 |
HIP 104807 |
23.62 |
| 2026-05-18 00:00 |
21:10:44.00 |
+61:36:26.7 |
HIP 104807 |
23.67 |
| 2026-05-18 12:00 |
21:10:42.73 |
+61:37:02.2 |
HIP 104807 |
23.74 |
| 2026-05-19 00:00 |
21:10:41.41 |
+61:37:37.6 |
HIP 104807 |
23.84 |
| 2026-05-19 12:00 |
21:10:40.05 |
+61:38:12.9 |
HIP 104807 |
23.95 |
| 2026-05-20 00:00 |
21:10:38.65 |
+61:38:48.2 |
HIP 104807 |
24.09 |
| 2026-05-20 12:00 |
21:10:37.20 |
+61:39:23.3 |
HIP 104807 |
24.24 |
| 2026-05-21 00:00 |
21:10:35.71 |
+61:39:58.3 |
HIP 104807 |
24.41 |
| 2026-05-21 12:00 |
21:10:34.18 |
+61:40:33.3 |
HIP 104807 |
24.61 |
| 2026-05-22 00:00 |
21:10:32.61 |
+61:41:08.1 |
HIP 104807 |
24.82 |
| 2026-05-22 12:00 |
21:10:30.99 |
+61:41:42.8 |
HIP 104807 |
25.04 |
| 2026-05-23 00:00 |
21:10:29.34 |
+61:42:17.4 |
HIP 104807 |
25.29 |
| 2026-05-23 12:00 |
21:10:27.63 |
+61:42:51.9 |
HIP 104807 |
25.55 |
| 2026-05-24 00:00 |
21:10:25.89 |
+61:43:26.3 |
HIP 104807 |
25.83 |
| 2026-05-24 12:00 |
21:10:24.11 |
+61:44:00.6 |
HIP 104807 |
26.12 |
| 2026-05-25 00:00 |
21:10:22.28 |
+61:44:34.8 |
HIP 104366 |
26.08 |
| 2026-05-25 12:00 |
21:10:20.41 |
+61:45:08.8 |
HIP 104366 |
25.48 |
| 2026-05-26 00:00 |
21:10:18.50 |
+61:45:42.8 |
HIP 104366 |
24.87 |
| 2026-05-26 12:00 |
21:10:16.54 |
+61:46:16.6 |
HIP 104366 |
24.27 |
| 2026-05-27 00:00 |
21:10:14.55 |
+61:46:50.3 |
HIP 104366 |
23.67 |
| 2026-05-27 12:00 |
21:10:12.51 |
+61:47:23.8 |
HIP 104366 |
23.06 |
| 2026-05-28 00:00 |
21:10:10.43 |
+61:47:57.2 |
HIP 104366 |
22.46 |
| 2026-05-28 12:00 |
21:10:08.31 |
+61:48:30.5 |
HIP 104366 |
21.85 |
| 2026-05-29 00:00 |
21:10:06.15 |
+61:49:03.7 |
HIP 104366 |
21.24 |
| 2026-05-29 12:00 |
21:10:03.95 |
+61:49:36.7 |
HIP 104366 |
20.64 |
| 2026-05-30 00:00 |
21:10:01.71 |
+61:50:09.5 |
HIP 104366 |
20.03 |
| 2026-05-30 12:00 |
21:09:59.42 |
+61:50:42.3 |
HIP 104366 |
19.43 |
| 2026-05-31 00:00 |
21:09:57.10 |
+61:51:14.9 |
HIP 104366 |
18.82 |
| 2026-05-31 12:00 |
21:09:54.73 |
+61:51:47.3 |
HIP 104366 |
18.21 |
| 2026-06-01 00:00 |
21:09:52.33 |
+61:52:19.6 |
HIP 104366 |
17.60 |
| 2026-06-01 12:00 |
21:09:49.88 |
+61:52:51.7 |
HIP 104366 |
17.00 |
| 2026-06-02 00:00 |
21:09:47.39 |
+61:53:23.7 |
HIP 104366 |
16.39 |