| Parameter |
Value |
| Designation |
C/2002 Q3 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2002-08-19T00:27:24.831360Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:20Z |
| Obs used |
75 |
| NEO |
- |
| M1 |
17.100 |
| K1 |
10.000 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2002-08-29.0000000 |
| e |
0.99831744 |
| q (au) |
1.306123 |
| a (au) |
776.272581 |
| i (deg) |
96.895223 |
| Ω (om, deg) |
154.151313 |
| ω (w, deg) |
125.698640 |
| M (ma, deg) |
0.000455 |
Magnitude
Scatter + Global Linear
$$
M_a = (18.038 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
18.038 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-1.000 |
| 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 |
08:19:43.75 |
-59:35:58.7 |
HIP 41037 |
21.85 |
| 2026-05-12 12:00 |
08:19:45.41 |
-59:35:21.2 |
HIP 41037 |
21.50 |
| 2026-05-13 00:00 |
08:19:47.11 |
-59:34:43.9 |
HIP 41037 |
21.16 |
| 2026-05-13 12:00 |
08:19:48.85 |
-59:34:06.7 |
HIP 41037 |
20.84 |
| 2026-05-14 00:00 |
08:19:50.63 |
-59:33:29.6 |
HIP 41037 |
20.52 |
| 2026-05-14 12:00 |
08:19:52.45 |
-59:32:52.7 |
HIP 41037 |
20.22 |
| 2026-05-15 00:00 |
08:19:54.30 |
-59:32:15.9 |
HIP 41037 |
19.92 |
| 2026-05-15 12:00 |
08:19:56.20 |
-59:31:39.2 |
HIP 41037 |
19.64 |
| 2026-05-16 00:00 |
08:19:58.13 |
-59:31:02.7 |
HIP 41037 |
19.38 |
| 2026-05-16 12:00 |
08:20:00.11 |
-59:30:26.3 |
HIP 41037 |
19.12 |
| 2026-05-17 00:00 |
08:20:02.12 |
-59:29:50.1 |
HIP 41037 |
18.89 |
| 2026-05-17 12:00 |
08:20:04.16 |
-59:29:14.0 |
HIP 41037 |
18.66 |
| 2026-05-18 00:00 |
08:20:06.25 |
-59:28:38.0 |
HIP 41037 |
18.45 |
| 2026-05-18 12:00 |
08:20:08.37 |
-59:28:02.2 |
HIP 41037 |
18.26 |
| 2026-05-19 00:00 |
08:20:10.53 |
-59:27:26.6 |
HIP 41037 |
18.09 |
| 2026-05-19 12:00 |
08:20:12.73 |
-59:26:51.1 |
HIP 41037 |
17.93 |
| 2026-05-20 00:00 |
08:20:14.97 |
-59:26:15.8 |
HIP 41037 |
17.79 |
| 2026-05-20 12:00 |
08:20:17.24 |
-59:25:40.6 |
HIP 41037 |
17.66 |
| 2026-05-21 00:00 |
08:20:19.55 |
-59:25:05.6 |
HIP 41037 |
17.56 |
| 2026-05-21 12:00 |
08:20:21.89 |
-59:24:30.8 |
HIP 41037 |
17.47 |
| 2026-05-22 00:00 |
08:20:24.27 |
-59:23:56.1 |
HIP 41037 |
17.40 |
| 2026-05-22 12:00 |
08:20:26.69 |
-59:23:21.6 |
HIP 41037 |
17.35 |
| 2026-05-23 00:00 |
08:20:29.14 |
-59:22:47.3 |
HIP 41037 |
17.32 |
| 2026-05-23 12:00 |
08:20:31.63 |
-59:22:13.2 |
HIP 41037 |
17.31 |
| 2026-05-24 00:00 |
08:20:34.15 |
-59:21:39.2 |
HIP 41037 |
17.31 |
| 2026-05-24 12:00 |
08:20:36.70 |
-59:21:05.4 |
HIP 41037 |
17.34 |
| 2026-05-25 00:00 |
08:20:39.30 |
-59:20:31.8 |
HIP 41037 |
17.38 |
| 2026-05-25 12:00 |
08:20:41.92 |
-59:19:58.4 |
HIP 41037 |
17.44 |
| 2026-05-26 00:00 |
08:20:44.58 |
-59:19:25.1 |
HIP 41037 |
17.53 |
| 2026-05-26 12:00 |
08:20:47.27 |
-59:18:52.1 |
HIP 41037 |
17.63 |
| 2026-05-27 00:00 |
08:20:50.00 |
-59:18:19.2 |
HIP 41037 |
17.74 |
| 2026-05-27 12:00 |
08:20:52.76 |
-59:17:46.5 |
HIP 41037 |
17.88 |
| 2026-05-28 00:00 |
08:20:55.55 |
-59:17:14.0 |
HIP 41037 |
18.03 |
| 2026-05-28 12:00 |
08:20:58.38 |
-59:16:41.7 |
HIP 41037 |
18.20 |
| 2026-05-29 00:00 |
08:21:01.24 |
-59:16:09.7 |
HIP 41037 |
18.38 |
| 2026-05-29 12:00 |
08:21:04.13 |
-59:15:37.8 |
HIP 41037 |
18.58 |
| 2026-05-30 00:00 |
08:21:07.06 |
-59:15:06.1 |
HIP 41037 |
18.79 |
| 2026-05-30 12:00 |
08:21:10.01 |
-59:14:34.6 |
HIP 41037 |
19.02 |
| 2026-05-31 00:00 |
08:21:13.00 |
-59:14:03.3 |
HIP 41037 |
19.27 |
| 2026-05-31 12:00 |
08:21:16.02 |
-59:13:32.2 |
HIP 41037 |
19.52 |
| 2026-06-01 00:00 |
08:21:19.07 |
-59:13:01.3 |
HIP 41037 |
19.79 |
| 2026-06-01 12:00 |
08:21:22.16 |
-59:12:30.6 |
HIP 41037 |
20.07 |
| 2026-06-02 00:00 |
08:21:25.27 |
-59:12:00.2 |
HIP 41037 |
20.36 |