C/2002 B2 (LINEAR)
| Parameter |
Value |
| Designation |
C/2002 B2 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2002-04-06T19:53:33.659520Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:13Z |
| Obs used |
52 |
| NEO |
- |
| M1 |
10.100 |
| K1 |
10.000 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2002-02-21.0000000 |
| e |
0.99722476 |
| q (au) |
3.842167 |
| a (au) |
1384.445431 |
| i (deg) |
152.872587 |
| Ω (om, deg) |
54.316972 |
| ω (w, deg) |
257.070080 |
| M (ma, deg) |
359.999142 |
Magnitude
Scatter + Global Linear
$$
M_a = (12.373 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
12.373 |
| n |
2.000 |
| gf |
0.800 |
| gb |
-0.500 |
| k |
1.000 |
| δ90 |
2.174 |
| 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 |
00:22:10.09 |
+21:49:06.7 |
HIP 1615 |
28.03 |
| 2026-02-03 12:00 |
00:22:11.58 |
+21:49:05.1 |
HIP 1615 |
28.36 |
| 2026-02-04 00:00 |
00:22:13.08 |
+21:49:03.6 |
HIP 1615 |
28.69 |
| 2026-02-04 12:00 |
00:22:14.60 |
+21:49:02.4 |
HIP 1615 |
29.04 |
| 2026-02-05 00:00 |
00:22:16.14 |
+21:49:01.3 |
HIP 1615 |
29.38 |
| 2026-02-05 12:00 |
00:22:17.70 |
+21:49:00.4 |
HIP 1615 |
29.73 |
| 2026-02-06 00:00 |
00:22:19.28 |
+21:48:59.7 |
HIP 1615 |
30.09 |
| 2026-02-06 12:00 |
00:22:20.87 |
+21:48:59.2 |
HIP 1615 |
30.45 |
| 2026-02-07 00:00 |
00:22:22.48 |
+21:48:58.9 |
HIP 1615 |
30.81 |
| 2026-02-07 12:00 |
00:22:24.11 |
+21:48:58.7 |
HIP 1615 |
31.18 |
| 2026-02-08 00:00 |
00:22:25.75 |
+21:48:58.7 |
HIP 1615 |
31.56 |
| 2026-02-08 12:00 |
00:22:27.41 |
+21:48:58.9 |
HIP 1615 |
31.93 |
| 2026-02-09 00:00 |
00:22:29.09 |
+21:48:59.3 |
HIP 1615 |
32.32 |
| 2026-02-09 12:00 |
00:22:30.79 |
+21:48:59.8 |
HIP 1615 |
32.71 |
| 2026-02-10 00:00 |
00:22:32.50 |
+21:49:00.5 |
HIP 1615 |
33.10 |
| 2026-02-10 12:00 |
00:22:34.23 |
+21:49:01.5 |
HIP 1615 |
33.49 |
| 2026-02-11 00:00 |
00:22:35.97 |
+21:49:02.5 |
HIP 1615 |
33.90 |
| 2026-02-11 12:00 |
00:22:37.73 |
+21:49:03.8 |
HIP 1813 |
33.87 |
| 2026-02-12 00:00 |
00:22:39.50 |
+21:49:05.2 |
HIP 1813 |
33.78 |
| 2026-02-12 12:00 |
00:22:41.30 |
+21:49:06.9 |
HIP 1813 |
33.70 |
| 2026-02-13 00:00 |
00:22:43.10 |
+21:49:08.7 |
HIP 1813 |
33.62 |
| 2026-02-13 12:00 |
00:22:44.92 |
+21:49:10.6 |
HIP 1813 |
33.54 |
| 2026-02-14 00:00 |
00:22:46.76 |
+21:49:12.8 |
HIP 1813 |
33.46 |
| 2026-02-14 12:00 |
00:22:48.61 |
+21:49:15.1 |
HIP 1813 |
33.39 |
| 2026-02-15 00:00 |
00:22:50.48 |
+21:49:17.6 |
HIP 1813 |
33.31 |
| 2026-02-15 12:00 |
00:22:52.36 |
+21:49:20.3 |
HIP 1813 |
33.24 |
| 2026-02-16 00:00 |
00:22:54.26 |
+21:49:23.1 |
HIP 1813 |
33.17 |
| 2026-02-16 12:00 |
00:22:56.17 |
+21:49:26.2 |
HIP 1813 |
33.11 |
| 2026-02-17 00:00 |
00:22:58.10 |
+21:49:29.4 |
HIP 1813 |
33.05 |
| 2026-02-17 12:00 |
00:23:00.04 |
+21:49:32.8 |
HIP 1813 |
32.99 |
| 2026-02-18 00:00 |
00:23:01.99 |
+21:49:36.3 |
HIP 1813 |
32.93 |
| 2026-02-18 12:00 |
00:23:03.96 |
+21:49:40.0 |
HIP 1813 |
32.88 |
| 2026-02-19 00:00 |
00:23:05.94 |
+21:49:43.9 |
HIP 1813 |
32.83 |
| 2026-02-19 12:00 |
00:23:07.93 |
+21:49:48.0 |
HIP 1813 |
32.78 |
| 2026-02-20 00:00 |
00:23:09.94 |
+21:49:52.3 |
HIP 1813 |
32.74 |
| 2026-02-20 12:00 |
00:23:11.96 |
+21:49:56.7 |
HIP 1813 |
32.70 |
| 2026-02-21 00:00 |
00:23:13.99 |
+21:50:01.3 |
HIP 1813 |
32.67 |
| 2026-02-21 12:00 |
00:23:16.04 |
+21:50:06.0 |
HIP 1813 |
32.64 |
| 2026-02-22 00:00 |
00:23:18.09 |
+21:50:10.9 |
HIP 1813 |
32.62 |
| 2026-02-22 12:00 |
00:23:20.16 |
+21:50:16.0 |
HIP 1813 |
32.60 |
| 2026-02-23 00:00 |
00:23:22.25 |
+21:50:21.3 |
HIP 1813 |
32.58 |
| 2026-02-23 12:00 |
00:23:24.34 |
+21:50:26.7 |
HIP 1813 |
32.57 |
| 2026-02-24 00:00 |
00:23:26.45 |
+21:50:32.3 |
HIP 1813 |
32.57 |