| Parameter |
Value |
| Designation |
C/2002 C2 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2002-04-10T19:34:16.780800Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:14Z |
| Obs used |
206 |
| NEO |
- |
| M1 |
10.200 |
| K1 |
8.500 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2002-05-23.0000000 |
| e |
0.99964080 |
| q (au) |
3.253749 |
| a (au) |
9058.346432 |
| i (deg) |
104.881376 |
| Ω (om, deg) |
242.955998 |
| ω (w, deg) |
159.933817 |
| M (ma, deg) |
0.000048 |
Magnitude
Scatter + Global Linear
$$
M_a = (8.703 + 5.569\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
8.703 |
| n |
5.569 |
| gf |
1.000 |
| gb |
-0.626 |
| 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 |
16:48:30.81 |
-73:05:29.1 |
HIP 82256 |
7.01 |
| 2026-05-12 12:00 |
16:48:22.15 |
-73:05:36.0 |
HIP 82256 |
7.12 |
| 2026-05-13 00:00 |
16:48:13.46 |
-73:05:42.7 |
HIP 82256 |
7.28 |
| 2026-05-13 12:00 |
16:48:04.74 |
-73:05:49.1 |
HIP 82256 |
7.48 |
| 2026-05-14 00:00 |
16:47:55.99 |
-73:05:55.2 |
HIP 82256 |
7.74 |
| 2026-05-14 12:00 |
16:47:47.21 |
-73:06:01.1 |
HIP 82256 |
8.03 |
| 2026-05-15 00:00 |
16:47:38.40 |
-73:06:06.6 |
HIP 82256 |
8.36 |
| 2026-05-15 12:00 |
16:47:29.56 |
-73:06:11.9 |
HIP 82256 |
8.72 |
| 2026-05-16 00:00 |
16:47:20.69 |
-73:06:16.9 |
HIP 82256 |
9.11 |
| 2026-05-16 12:00 |
16:47:11.80 |
-73:06:21.6 |
HIP 82256 |
9.53 |
| 2026-05-17 00:00 |
16:47:02.88 |
-73:06:26.0 |
HIP 82256 |
9.97 |
| 2026-05-17 12:00 |
16:46:53.94 |
-73:06:30.1 |
HIP 82256 |
10.43 |
| 2026-05-18 00:00 |
16:46:44.97 |
-73:06:33.9 |
HIP 82256 |
10.90 |
| 2026-05-18 12:00 |
16:46:35.97 |
-73:06:37.4 |
HIP 82256 |
11.40 |
| 2026-05-19 00:00 |
16:46:26.96 |
-73:06:40.7 |
HIP 82256 |
11.90 |
| 2026-05-19 12:00 |
16:46:17.92 |
-73:06:43.6 |
HIP 82256 |
12.42 |
| 2026-05-20 00:00 |
16:46:08.86 |
-73:06:46.3 |
HIP 82256 |
12.95 |
| 2026-05-20 12:00 |
16:45:59.78 |
-73:06:48.7 |
HIP 82256 |
13.49 |
| 2026-05-21 00:00 |
16:45:50.69 |
-73:06:50.7 |
HIP 82256 |
14.04 |
| 2026-05-21 12:00 |
16:45:41.57 |
-73:06:52.5 |
HIP 82256 |
14.60 |
| 2026-05-22 00:00 |
16:45:32.44 |
-73:06:54.0 |
HIP 82256 |
15.16 |
| 2026-05-22 12:00 |
16:45:23.29 |
-73:06:55.2 |
HIP 82256 |
15.73 |
| 2026-05-23 00:00 |
16:45:14.12 |
-73:06:56.1 |
HIP 82256 |
16.31 |
| 2026-05-23 12:00 |
16:45:04.94 |
-73:06:56.7 |
HIP 82256 |
16.89 |
| 2026-05-24 00:00 |
16:44:55.74 |
-73:06:57.0 |
HIP 82256 |
17.47 |
| 2026-05-24 12:00 |
16:44:46.53 |
-73:06:57.1 |
HIP 82256 |
18.06 |
| 2026-05-25 00:00 |
16:44:37.31 |
-73:06:56.8 |
HIP 82256 |
18.66 |
| 2026-05-25 12:00 |
16:44:28.08 |
-73:06:56.2 |
HIP 82256 |
19.26 |
| 2026-05-26 00:00 |
16:44:18.83 |
-73:06:55.4 |
HIP 82256 |
19.86 |
| 2026-05-26 12:00 |
16:44:09.58 |
-73:06:54.2 |
HIP 81597 |
19.70 |
| 2026-05-27 00:00 |
16:44:00.31 |
-73:06:52.8 |
HIP 81597 |
19.04 |
| 2026-05-27 12:00 |
16:43:51.04 |
-73:06:51.0 |
HIP 81597 |
18.39 |
| 2026-05-28 00:00 |
16:43:41.76 |
-73:06:49.0 |
HIP 81597 |
17.73 |
| 2026-05-28 12:00 |
16:43:32.47 |
-73:06:46.7 |
HIP 81597 |
17.07 |
| 2026-05-29 00:00 |
16:43:23.17 |
-73:06:44.1 |
HIP 81597 |
16.41 |
| 2026-05-29 12:00 |
16:43:13.87 |
-73:06:41.1 |
HIP 81597 |
15.75 |
| 2026-05-30 00:00 |
16:43:04.57 |
-73:06:37.9 |
HIP 81597 |
15.09 |
| 2026-05-30 12:00 |
16:42:55.26 |
-73:06:34.4 |
HIP 81597 |
14.43 |
| 2026-05-31 00:00 |
16:42:45.94 |
-73:06:30.6 |
HIP 81597 |
13.77 |
| 2026-05-31 12:00 |
16:42:36.63 |
-73:06:26.6 |
HIP 81597 |
13.11 |
| 2026-06-01 00:00 |
16:42:27.31 |
-73:06:22.2 |
HIP 81597 |
12.46 |
| 2026-06-01 12:00 |
16:42:17.99 |
-73:06:17.5 |
HIP 81597 |
11.80 |
| 2026-06-02 00:00 |
16:42:08.67 |
-73:06:12.6 |
HIP 81597 |
11.14 |