| Parameter |
Value |
| Designation |
C/2007 D3 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2007-05-27T16:50:25.203840Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:04Z |
| Obs used |
177 |
| NEO |
- |
| M1 |
8.800 |
| K1 |
8.500 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2007-11-28.0000000 |
| e |
0.99201293 |
| q (au) |
5.208969 |
| a (au) |
652.174844 |
| i (deg) |
45.920258 |
| Ω (om, deg) |
148.429528 |
| ω (w, deg) |
309.094137 |
| M (ma, deg) |
0.010906 |
Magnitude
Scatter + Global Linear
$$
M_a = (8.625 + 3.167\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
8.625 |
| n |
3.167 |
| gf |
1.000 |
| gb |
-0.948 |
| 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) |
| 2026-05-12 00:00 |
16:02:03.84 |
+27:18:21.1 |
HIP 78470 |
15.89 |
| 2026-05-12 12:00 |
16:02:00.52 |
+27:18:34.4 |
HIP 78470 |
15.45 |
| 2026-05-13 00:00 |
16:01:57.20 |
+27:18:47.5 |
HIP 78470 |
15.04 |
| 2026-05-13 12:00 |
16:01:53.87 |
+27:19:00.2 |
HIP 78470 |
14.65 |
| 2026-05-14 00:00 |
16:01:50.54 |
+27:19:12.6 |
HIP 78470 |
14.29 |
| 2026-05-14 12:00 |
16:01:47.21 |
+27:19:24.7 |
HIP 78470 |
13.96 |
| 2026-05-15 00:00 |
16:01:43.86 |
+27:19:36.5 |
HIP 78470 |
13.66 |
| 2026-05-15 12:00 |
16:01:40.52 |
+27:19:48.0 |
HIP 78470 |
13.39 |
| 2026-05-16 00:00 |
16:01:37.16 |
+27:19:59.2 |
HIP 78470 |
13.15 |
| 2026-05-16 12:00 |
16:01:33.81 |
+27:20:10.0 |
HIP 78470 |
12.95 |
| 2026-05-17 00:00 |
16:01:30.45 |
+27:20:20.5 |
HIP 78470 |
12.79 |
| 2026-05-17 12:00 |
16:01:27.09 |
+27:20:30.7 |
HIP 78470 |
12.67 |
| 2026-05-18 00:00 |
16:01:23.72 |
+27:20:40.6 |
HIP 78470 |
12.58 |
| 2026-05-18 12:00 |
16:01:20.35 |
+27:20:50.2 |
HIP 78470 |
12.54 |
| 2026-05-19 00:00 |
16:01:16.98 |
+27:20:59.4 |
HIP 78470 |
12.54 |
| 2026-05-19 12:00 |
16:01:13.61 |
+27:21:08.3 |
HIP 78470 |
12.58 |
| 2026-05-20 00:00 |
16:01:10.23 |
+27:21:16.9 |
HIP 78470 |
12.67 |
| 2026-05-20 12:00 |
16:01:06.86 |
+27:21:25.1 |
HIP 78470 |
12.79 |
| 2026-05-21 00:00 |
16:01:03.48 |
+27:21:33.1 |
HIP 78470 |
12.95 |
| 2026-05-21 12:00 |
16:01:00.10 |
+27:21:40.7 |
HIP 78470 |
13.14 |
| 2026-05-22 00:00 |
16:00:56.72 |
+27:21:48.0 |
HIP 78470 |
13.38 |
| 2026-05-22 12:00 |
16:00:53.34 |
+27:21:54.9 |
HIP 78470 |
13.64 |
| 2026-05-23 00:00 |
16:00:49.96 |
+27:22:01.6 |
HIP 78470 |
13.94 |
| 2026-05-23 12:00 |
16:00:46.58 |
+27:22:07.9 |
HIP 78470 |
14.26 |
| 2026-05-24 00:00 |
16:00:43.20 |
+27:22:13.9 |
HIP 78470 |
14.62 |
| 2026-05-24 12:00 |
16:00:39.82 |
+27:22:19.5 |
HIP 78470 |
15.00 |
| 2026-05-25 00:00 |
16:00:36.45 |
+27:22:24.9 |
HIP 78470 |
15.40 |
| 2026-05-25 12:00 |
16:00:33.07 |
+27:22:29.9 |
HIP 78470 |
15.82 |
| 2026-05-26 00:00 |
16:00:29.70 |
+27:22:34.6 |
HIP 78470 |
16.26 |
| 2026-05-26 12:00 |
16:00:26.33 |
+27:22:38.9 |
HIP 78470 |
16.72 |
| 2026-05-27 00:00 |
16:00:22.96 |
+27:22:43.0 |
HIP 78470 |
17.19 |
| 2026-05-27 12:00 |
16:00:19.59 |
+27:22:46.7 |
HIP 78470 |
17.68 |
| 2026-05-28 00:00 |
16:00:16.22 |
+27:22:50.0 |
HIP 78470 |
18.18 |
| 2026-05-28 12:00 |
16:00:12.86 |
+27:22:53.1 |
HIP 78470 |
18.70 |
| 2026-05-29 00:00 |
16:00:09.50 |
+27:22:55.8 |
HIP 78470 |
19.22 |
| 2026-05-29 12:00 |
16:00:06.15 |
+27:22:58.2 |
HIP 78470 |
19.76 |
| 2026-05-30 00:00 |
16:00:02.80 |
+27:23:00.3 |
HIP 78470 |
20.30 |
| 2026-05-30 12:00 |
15:59:59.45 |
+27:23:02.1 |
HIP 78470 |
20.85 |
| 2026-05-31 00:00 |
15:59:56.11 |
+27:23:03.5 |
HIP 78470 |
21.41 |
| 2026-05-31 12:00 |
15:59:52.77 |
+27:23:04.6 |
HIP 78470 |
21.98 |
| 2026-06-01 00:00 |
15:59:49.44 |
+27:23:05.3 |
HIP 78470 |
22.55 |
| 2026-06-01 12:00 |
15:59:46.11 |
+27:23:05.8 |
HIP 78470 |
23.13 |
| 2026-06-02 00:00 |
15:59:42.79 |
+27:23:05.9 |
HIP 78470 |
23.71 |