| Parameter |
Value |
| Designation |
C/2002 A3 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2002-04-24T16:39:20.770560Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:13Z |
| Obs used |
284 |
| NEO |
- |
| M1 |
6.600 |
| K1 |
10.750 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2002-08-09.0000000 |
| e |
1.00944709 |
| q (au) |
5.151609 |
| a (au) |
-545.311986 |
| i (deg) |
48.082650 |
| Ω (om, deg) |
136.526383 |
| ω (w, deg) |
329.528821 |
| M (ma, deg) |
0.008228 |
Magnitude
Scatter + Global Linear
$$
M_a = (2.473 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
2.473 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.502 |
| k |
1.000 |
| 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) |
| 2026-06-01 00:00 |
17:17:31.15 |
+22:44:26.4 |
HIP 84599 |
21.03 |
| 2026-06-01 12:00 |
17:17:28.28 |
+22:44:32.4 |
HIP 84599 |
20.97 |
| 2026-06-02 00:00 |
17:17:25.41 |
+22:44:38.2 |
HIP 84599 |
20.94 |
| 2026-06-02 12:00 |
17:17:22.54 |
+22:44:43.7 |
HIP 84599 |
20.94 |
| 2026-06-03 00:00 |
17:17:19.66 |
+22:44:49.0 |
HIP 84599 |
20.96 |
| 2026-06-03 12:00 |
17:17:16.78 |
+22:44:54.0 |
HIP 84599 |
21.00 |
| 2026-06-04 00:00 |
17:17:13.89 |
+22:44:58.7 |
HIP 84599 |
21.08 |
| 2026-06-04 12:00 |
17:17:11.00 |
+22:45:03.2 |
HIP 84599 |
21.17 |
| 2026-06-05 00:00 |
17:17:08.11 |
+22:45:07.4 |
HIP 84599 |
21.30 |
| 2026-06-05 12:00 |
17:17:05.22 |
+22:45:11.3 |
HIP 84599 |
21.44 |
| 2026-06-06 00:00 |
17:17:02.32 |
+22:45:15.0 |
HIP 84599 |
21.61 |
| 2026-06-06 12:00 |
17:16:59.42 |
+22:45:18.5 |
HIP 84599 |
21.81 |
| 2026-06-07 00:00 |
17:16:56.52 |
+22:45:21.6 |
HIP 84599 |
22.03 |
| 2026-06-07 12:00 |
17:16:53.62 |
+22:45:24.5 |
HIP 84599 |
22.27 |
| 2026-06-08 00:00 |
17:16:50.71 |
+22:45:27.1 |
HIP 84599 |
22.53 |
| 2026-06-08 12:00 |
17:16:47.80 |
+22:45:29.5 |
HIP 84599 |
22.81 |
| 2026-06-09 00:00 |
17:16:44.90 |
+22:45:31.6 |
HIP 84599 |
23.11 |
| 2026-06-09 12:00 |
17:16:41.99 |
+22:45:33.4 |
HIP 84599 |
23.43 |
| 2026-06-10 00:00 |
17:16:39.08 |
+22:45:35.0 |
HIP 84599 |
23.77 |
| 2026-06-10 12:00 |
17:16:36.17 |
+22:45:36.3 |
HIP 84599 |
24.13 |
| 2026-06-11 00:00 |
17:16:33.26 |
+22:45:37.3 |
HIP 84599 |
24.50 |
| 2026-06-11 12:00 |
17:16:30.35 |
+22:45:38.0 |
HIP 84599 |
24.89 |
| 2026-06-12 00:00 |
17:16:27.44 |
+22:45:38.5 |
HIP 84599 |
25.30 |
| 2026-06-12 12:00 |
17:16:24.53 |
+22:45:38.8 |
HIP 84599 |
25.72 |
| 2026-06-13 00:00 |
17:16:21.62 |
+22:45:38.7 |
HIP 84599 |
26.15 |
| 2026-06-13 12:00 |
17:16:18.72 |
+22:45:38.4 |
HIP 84599 |
26.60 |
| 2026-06-14 00:00 |
17:16:15.81 |
+22:45:37.8 |
HIP 84599 |
27.06 |
| 2026-06-14 12:00 |
17:16:12.91 |
+22:45:37.0 |
HIP 84599 |
27.53 |
| 2026-06-15 00:00 |
17:16:10.00 |
+22:45:35.8 |
HIP 84599 |
28.01 |
| 2026-06-15 12:00 |
17:16:07.10 |
+22:45:34.4 |
HIP 84555 |
28.38 |
| 2026-06-16 00:00 |
17:16:04.21 |
+22:45:32.8 |
HIP 84555 |
28.68 |
| 2026-06-16 12:00 |
17:16:01.31 |
+22:45:30.9 |
HIP 84555 |
28.99 |
| 2026-06-17 00:00 |
17:15:58.42 |
+22:45:28.7 |
HIP 84555 |
29.30 |
| 2026-06-17 12:00 |
17:15:55.53 |
+22:45:26.2 |
HIP 84555 |
29.62 |
| 2026-06-18 00:00 |
17:15:52.64 |
+22:45:23.5 |
HIP 84555 |
29.95 |
| 2026-06-18 12:00 |
17:15:49.76 |
+22:45:20.5 |
HIP 84555 |
30.29 |
| 2026-06-19 00:00 |
17:15:46.88 |
+22:45:17.2 |
HIP 84555 |
30.63 |
| 2026-06-19 12:00 |
17:15:44.00 |
+22:45:13.7 |
HIP 84468 |
30.87 |
| 2026-06-20 00:00 |
17:15:41.13 |
+22:45:09.9 |
HIP 84262 |
30.21 |
| 2026-06-20 12:00 |
17:15:38.27 |
+22:45:05.8 |
HIP 84262 |
29.55 |
| 2026-06-21 00:00 |
17:15:35.41 |
+22:45:01.5 |
HIP 84262 |
28.89 |
| 2026-06-21 12:00 |
17:15:32.55 |
+22:44:56.9 |
HIP 84262 |
28.23 |
| 2026-06-22 00:00 |
17:15:29.70 |
+22:44:52.0 |
HIP 84262 |
27.57 |