| Parameter |
Value |
| Designation |
277P/LINEAR |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2013-06-04T19:48:10.031040Z |
| Orbit solution date (soln_date, UTC) |
2021-05-02T23:43:01Z |
| Obs used |
828 |
| NEO |
- |
| M1 |
11.800 |
| K1 |
19.500 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2016-09-16.0000000 |
| e |
0.50379346 |
| q (au) |
1.914197 |
| a (au) |
3.857662 |
| i (deg) |
16.748332 |
| Ω (om, deg) |
276.352145 |
| ω (w, deg) |
152.176271 |
| M (ma, deg) |
155.991309 |
Magnitude
Scatter + Global Linear
$$
M_a = (12.075 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
12.075 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| 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 |
19:18:08.65 |
-20:28:01.0 |
HIP 94964 |
18.86 |
| 2026-06-01 12:00 |
19:17:55.22 |
-20:27:36.5 |
HIP 94964 |
21.94 |
| 2026-06-02 00:00 |
19:17:41.60 |
-20:27:12.2 |
HIP 94749 |
23.24 |
| 2026-06-02 12:00 |
19:17:27.79 |
-20:26:48.1 |
HIP 94749 |
21.98 |
| 2026-06-03 00:00 |
19:17:13.79 |
-20:26:24.3 |
HIP 94749 |
21.15 |
| 2026-06-03 12:00 |
19:16:59.61 |
-20:26:00.7 |
HIP 94749 |
20.79 |
| 2026-06-04 00:00 |
19:16:45.24 |
-20:25:37.3 |
HIP 94749 |
20.97 |
| 2026-06-04 12:00 |
19:16:30.69 |
-20:25:14.1 |
HIP 94749 |
21.68 |
| 2026-06-05 00:00 |
19:16:15.96 |
-20:24:51.1 |
HIP 94749 |
22.90 |
| 2026-06-05 12:00 |
19:16:01.04 |
-20:24:28.3 |
HIP 94749 |
24.57 |
| 2026-06-06 00:00 |
19:15:45.95 |
-20:24:05.8 |
HIP 94749 |
26.62 |
| 2026-06-06 12:00 |
19:15:30.68 |
-20:23:43.4 |
HIP 94749 |
28.99 |
| 2026-06-07 00:00 |
19:15:15.23 |
-20:23:21.3 |
HIP 94429 |
29.62 |
| 2026-06-07 12:00 |
19:14:59.61 |
-20:22:59.3 |
HIP 94429 |
25.99 |
| 2026-06-08 00:00 |
19:14:43.81 |
-20:22:37.6 |
HIP 94429 |
22.35 |
| 2026-06-08 12:00 |
19:14:27.85 |
-20:22:16.0 |
HIP 94429 |
18.70 |
| 2026-06-09 00:00 |
19:14:11.71 |
-20:21:54.7 |
HIP 94429 |
15.06 |
| 2026-06-09 12:00 |
19:13:55.41 |
-20:21:33.5 |
HIP 94429 |
11.48 |
| 2026-06-10 00:00 |
19:13:38.94 |
-20:21:12.5 |
HIP 94429 |
8.11 |
| 2026-06-10 12:00 |
19:13:22.31 |
-20:20:51.6 |
HIP 94429 |
5.42 |
| 2026-06-11 00:00 |
19:13:05.52 |
-20:20:31.0 |
HIP 94429 |
4.87 |
| 2026-06-11 12:00 |
19:12:48.57 |
-20:20:10.5 |
HIP 94429 |
7.04 |
| 2026-06-12 00:00 |
19:12:31.46 |
-20:19:50.2 |
HIP 94320 |
9.69 |
| 2026-06-12 12:00 |
19:12:14.20 |
-20:19:30.0 |
HIP 94320 |
6.15 |
| 2026-06-13 00:00 |
19:11:56.78 |
-20:19:10.0 |
HIP 94320 |
3.84 |
| 2026-06-13 12:00 |
19:11:39.22 |
-20:18:50.2 |
HIP 94320 |
5.04 |
| 2026-06-14 00:00 |
19:11:21.50 |
-20:18:30.5 |
HIP 94274 |
2.38 |
| 2026-06-14 12:00 |
19:11:03.64 |
-20:18:11.0 |
HIP 94274 |
4.52 |
| 2026-06-15 00:00 |
19:10:45.64 |
-20:17:51.6 |
HIP 94274 |
8.42 |
| 2026-06-15 12:00 |
19:10:27.50 |
-20:17:32.4 |
HIP 94274 |
12.57 |
| 2026-06-16 00:00 |
19:10:09.22 |
-20:17:13.3 |
HIP 94127 |
16.37 |
| 2026-06-16 12:00 |
19:09:50.80 |
-20:16:54.3 |
HIP 94127 |
14.70 |
| 2026-06-17 00:00 |
19:09:32.26 |
-20:16:35.5 |
HIP 94127 |
14.22 |
| 2026-06-17 12:00 |
19:09:13.58 |
-20:16:16.8 |
HIP 94127 |
15.05 |
| 2026-06-18 00:00 |
19:08:54.78 |
-20:15:58.2 |
HIP 94127 |
17.04 |
| 2026-06-18 12:00 |
19:08:35.85 |
-20:15:39.7 |
HIP 94127 |
19.85 |
| 2026-06-19 00:00 |
19:08:16.81 |
-20:15:21.3 |
HIP 94021 |
20.21 |
| 2026-06-19 12:00 |
19:07:57.64 |
-20:15:03.0 |
HIP 93870 |
20.76 |
| 2026-06-20 00:00 |
19:07:38.36 |
-20:14:44.9 |
HIP 93870 |
17.94 |
| 2026-06-20 12:00 |
19:07:18.97 |
-20:14:26.8 |
HIP 93870 |
15.93 |
| 2026-06-21 00:00 |
19:06:59.47 |
-20:14:08.9 |
HIP 93869 |
15.06 |
| 2026-06-21 12:00 |
19:06:39.87 |
-20:13:51.0 |
HIP 93869 |
15.50 |
| 2026-06-22 00:00 |
19:06:20.16 |
-20:13:33.2 |
HIP 93869 |
17.23 |