메타데이터
| 항목 |
값 |
| Designation |
309P/LINEAR |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2015-02-16T06:54:37.134720Z |
| Orbit solution date (soln_date, UTC) |
2025-04-11T14:45:16Z |
| Obs used |
444 |
| NEO |
- |
| M1 |
16.200 |
| K1 |
6.750 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2011-11-28.0000000 |
| e |
0.60799848 |
| q (au) |
1.743209 |
| a (au) |
4.446944 |
| i (deg) |
17.665058 |
| Ω (om, deg) |
11.445885 |
| ω (w, deg) |
50.795718 |
| M (ma, deg) |
236.369621 |
밝기
산란 + 전체 선형
$$
M_a = (16.080 + 2.428\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
16.080 |
| n |
2.428 |
| gf |
1.000 |
| gb |
-0.905 |
| k |
0.999 |
| δ90 |
10.000 |
| 파라미터 |
기호 |
범위 |
설명 |
| 태양·지구거리 1 AU에서의 절대등급 |
H0 |
-5 to 20 |
혜성의 고유 밝기 |
| 광도 기울기 파라미터 |
n |
2 to 6 |
태양거리 변화에 따른 밝기 변화율 |
| 전방 산란 비대칭 계수 |
gf |
0.8 to 1 |
전방 산란의 강도 |
| 후방 산란 비대칭 계수 |
gb |
-1 to -0.5 |
후방 산란의 강도 |
| 분할 계수 |
k |
0.8 to 1 |
전·후방 산란 기여도 비율 |
| 먼지/가스 밝기 비 |
δ90 |
1 to 10 |
코마에서 먼지 산란 대비 가스 방출의 상대 기여 |
참고: EPSC-DPS2025-160
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
12:57:50.63 |
-12:10:06.6 |
HIP 63220 |
11.10 |
| 2026-06-01 12:00 |
12:57:43.73 |
-12:09:27.8 |
HIP 63220 |
9.34 |
| 2026-06-02 00:00 |
12:57:37.00 |
-12:08:49.8 |
HIP 63220 |
7.65 |
| 2026-06-02 12:00 |
12:57:30.44 |
-12:08:12.8 |
HIP 63220 |
6.04 |
| 2026-06-03 00:00 |
12:57:24.06 |
-12:07:36.6 |
HIP 63220 |
4.54 |
| 2026-06-03 12:00 |
12:57:17.86 |
-12:07:01.2 |
HIP 63220 |
3.26 |
| 2026-06-04 00:00 |
12:57:11.84 |
-12:06:26.8 |
HIP 63220 |
2.44 |
| 2026-06-04 12:00 |
12:57:05.99 |
-12:05:53.3 |
HIP 63220 |
2.49 |
| 2026-06-05 00:00 |
12:57:00.31 |
-12:05:20.6 |
HIP 63220 |
3.30 |
| 2026-06-05 12:00 |
12:56:54.82 |
-12:04:48.9 |
HIP 63220 |
4.44 |
| 2026-06-06 00:00 |
12:56:49.50 |
-12:04:18.0 |
HIP 63220 |
5.68 |
| 2026-06-06 12:00 |
12:56:44.35 |
-12:03:48.1 |
HIP 63220 |
6.93 |
| 2026-06-07 00:00 |
12:56:39.39 |
-12:03:19.0 |
HIP 63189 |
6.76 |
| 2026-06-07 12:00 |
12:56:34.60 |
-12:02:50.9 |
HIP 63189 |
6.56 |
| 2026-06-08 00:00 |
12:56:29.98 |
-12:02:23.7 |
HIP 63189 |
6.60 |
| 2026-06-08 12:00 |
12:56:25.55 |
-12:01:57.4 |
HIP 63189 |
6.84 |
| 2026-06-09 00:00 |
12:56:21.29 |
-12:01:32.1 |
HIP 63189 |
7.24 |
| 2026-06-09 12:00 |
12:56:17.20 |
-12:01:07.7 |
HIP 63189 |
7.76 |
| 2026-06-10 00:00 |
12:56:13.29 |
-12:00:44.2 |
HIP 63189 |
8.36 |
| 2026-06-10 12:00 |
12:56:09.56 |
-12:00:21.6 |
HIP 63189 |
9.00 |
| 2026-06-11 00:00 |
12:56:06.00 |
-12:00:00.0 |
HIP 63189 |
9.67 |
| 2026-06-11 12:00 |
12:56:02.63 |
-11:59:39.3 |
HIP 63189 |
10.34 |
| 2026-06-12 00:00 |
12:55:59.42 |
-11:59:19.5 |
HIP 63189 |
11.00 |
| 2026-06-12 12:00 |
12:55:56.39 |
-11:59:00.7 |
HIP 63189 |
11.66 |
| 2026-06-13 00:00 |
12:55:53.54 |
-11:58:42.9 |
HIP 63189 |
12.29 |
| 2026-06-13 12:00 |
12:55:50.86 |
-11:58:26.0 |
HIP 63189 |
12.89 |
| 2026-06-14 00:00 |
12:55:48.36 |
-11:58:10.1 |
HIP 63189 |
13.46 |
| 2026-06-14 12:00 |
12:55:46.04 |
-11:57:55.1 |
HIP 63189 |
14.00 |
| 2026-06-15 00:00 |
12:55:43.89 |
-11:57:41.0 |
HIP 63189 |
14.51 |
| 2026-06-15 12:00 |
12:55:41.91 |
-11:57:28.0 |
HIP 63189 |
14.97 |
| 2026-06-16 00:00 |
12:55:40.11 |
-11:57:15.9 |
HIP 63189 |
15.40 |
| 2026-06-16 12:00 |
12:55:38.48 |
-11:57:04.7 |
HIP 63189 |
15.80 |
| 2026-06-17 00:00 |
12:55:37.03 |
-11:56:54.6 |
HIP 63189 |
16.15 |
| 2026-06-17 12:00 |
12:55:35.75 |
-11:56:45.3 |
HIP 63189 |
16.46 |
| 2026-06-18 00:00 |
12:55:34.64 |
-11:56:37.1 |
HIP 63189 |
16.73 |
| 2026-06-18 12:00 |
12:55:33.70 |
-11:56:29.8 |
HIP 63189 |
16.96 |
| 2026-06-19 00:00 |
12:55:32.94 |
-11:56:23.5 |
HIP 63189 |
17.15 |
| 2026-06-19 12:00 |
12:55:32.34 |
-11:56:18.1 |
HIP 63189 |
17.29 |
| 2026-06-20 00:00 |
12:55:31.92 |
-11:56:13.7 |
HIP 63189 |
17.40 |
| 2026-06-20 12:00 |
12:55:31.67 |
-11:56:10.3 |
HIP 63189 |
17.46 |
| 2026-06-21 00:00 |
12:55:31.58 |
-11:56:07.8 |
HIP 63189 |
17.48 |
| 2026-06-21 12:00 |
12:55:31.67 |
-11:56:06.3 |
HIP 63189 |
17.46 |
| 2026-06-22 00:00 |
12:55:31.92 |
-11:56:05.8 |
HIP 63189 |
17.40 |