메타데이터
| 항목 |
값 |
| Designation |
C/1966 P2 (Barbon) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1966-04-17T18:42:45.604800Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:17Z |
| Obs used |
90 |
| NEO |
- |
| M1 |
5.600 |
| K1 |
11.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1966-09-13.0000000 |
| e |
0.99811001 |
| q (au) |
2.018741 |
| a (au) |
1068.123028 |
| i (deg) |
28.707616 |
| Ω (om, deg) |
167.689319 |
| ω (w, deg) |
136.165961 |
| M (ma, deg) |
0.004185 |
밝기
산란 + 전체 선형
$$
M_a = (4.144 + 4.695\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
4.144 |
| n |
4.695 |
| gf |
0.997 |
| gb |
-0.729 |
| k |
1.000 |
| δ90 |
9.999 |
| 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) |
| 2026-07-29 00:00 |
07:11:52.58 |
-02:24:26.6 |
HIP 34815 |
12.75 |
| 2026-07-29 12:00 |
07:11:53.90 |
-02:24:31.6 |
HIP 34815 |
12.48 |
| 2026-07-30 00:00 |
07:11:55.22 |
-02:24:36.7 |
HIP 34815 |
12.22 |
| 2026-07-30 12:00 |
07:11:56.54 |
-02:24:41.9 |
HIP 34815 |
11.95 |
| 2026-07-31 00:00 |
07:11:57.85 |
-02:24:47.1 |
HIP 34815 |
11.70 |
| 2026-07-31 12:00 |
07:11:59.16 |
-02:24:52.4 |
HIP 34815 |
11.44 |
| 2026-08-01 00:00 |
07:12:00.47 |
-02:24:57.7 |
HIP 34815 |
11.19 |
| 2026-08-01 12:00 |
07:12:01.77 |
-02:25:03.1 |
HIP 34815 |
10.95 |
| 2026-08-02 00:00 |
07:12:03.06 |
-02:25:08.6 |
HIP 34815 |
10.70 |
| 2026-08-02 12:00 |
07:12:04.35 |
-02:25:14.1 |
HIP 34815 |
10.47 |
| 2026-08-03 00:00 |
07:12:05.64 |
-02:25:19.7 |
HIP 34815 |
10.24 |
| 2026-08-03 12:00 |
07:12:06.92 |
-02:25:25.4 |
HIP 34815 |
10.01 |
| 2026-08-04 00:00 |
07:12:08.20 |
-02:25:31.1 |
HIP 34815 |
9.79 |
| 2026-08-04 12:00 |
07:12:09.48 |
-02:25:36.9 |
HIP 34815 |
9.58 |
| 2026-08-05 00:00 |
07:12:10.74 |
-02:25:42.7 |
HIP 34815 |
9.37 |
| 2026-08-05 12:00 |
07:12:12.01 |
-02:25:48.6 |
HIP 34815 |
9.17 |
| 2026-08-06 00:00 |
07:12:13.27 |
-02:25:54.5 |
HIP 34815 |
8.97 |
| 2026-08-06 12:00 |
07:12:14.52 |
-02:26:00.5 |
HIP 34815 |
8.79 |
| 2026-08-07 00:00 |
07:12:15.77 |
-02:26:06.6 |
HIP 34815 |
8.61 |
| 2026-08-07 12:00 |
07:12:17.01 |
-02:26:12.7 |
HIP 34815 |
8.44 |
| 2026-08-08 00:00 |
07:12:18.25 |
-02:26:18.9 |
HIP 34815 |
8.28 |
| 2026-08-08 12:00 |
07:12:19.48 |
-02:26:25.1 |
HIP 34837 |
8.09 |
| 2026-08-09 00:00 |
07:12:20.71 |
-02:26:31.4 |
HIP 34837 |
7.85 |
| 2026-08-09 12:00 |
07:12:21.93 |
-02:26:37.7 |
HIP 34837 |
7.63 |
| 2026-08-10 00:00 |
07:12:23.14 |
-02:26:44.1 |
HIP 34837 |
7.41 |
| 2026-08-10 12:00 |
07:12:24.35 |
-02:26:50.6 |
HIP 34837 |
7.20 |
| 2026-08-11 00:00 |
07:12:25.56 |
-02:26:57.1 |
HIP 34837 |
7.00 |
| 2026-08-11 12:00 |
07:12:26.75 |
-02:27:03.6 |
HIP 34837 |
6.81 |
| 2026-08-12 00:00 |
07:12:27.95 |
-02:27:10.2 |
HIP 34837 |
6.62 |
| 2026-08-12 12:00 |
07:12:29.13 |
-02:27:16.9 |
HIP 34837 |
6.45 |
| 2026-08-13 00:00 |
07:12:30.31 |
-02:27:23.6 |
HIP 34837 |
6.28 |
| 2026-08-13 12:00 |
07:12:31.48 |
-02:27:30.4 |
HIP 34837 |
6.13 |
| 2026-08-14 00:00 |
07:12:32.65 |
-02:27:37.2 |
HIP 34837 |
5.99 |
| 2026-08-14 12:00 |
07:12:33.81 |
-02:27:44.1 |
HIP 34837 |
5.86 |
| 2026-08-15 00:00 |
07:12:34.96 |
-02:27:51.0 |
HIP 34837 |
5.75 |
| 2026-08-15 12:00 |
07:12:36.11 |
-02:27:58.0 |
HIP 34837 |
5.64 |
| 2026-08-16 00:00 |
07:12:37.25 |
-02:28:05.0 |
HIP 34837 |
5.56 |
| 2026-08-16 12:00 |
07:12:38.38 |
-02:28:12.0 |
HIP 34837 |
5.48 |
| 2026-08-17 00:00 |
07:12:39.51 |
-02:28:19.2 |
HIP 34837 |
5.43 |
| 2026-08-17 12:00 |
07:12:40.62 |
-02:28:26.3 |
HIP 34837 |
5.39 |
| 2026-08-18 00:00 |
07:12:41.74 |
-02:28:33.5 |
HIP 34837 |
5.36 |
| 2026-08-18 12:00 |
07:12:42.84 |
-02:28:40.8 |
HIP 34837 |
5.35 |
| 2026-08-19 00:00 |
07:12:43.94 |
-02:28:48.1 |
HIP 34837 |
5.35 |