메타데이터
| 항목 |
값 |
| Designation |
C/2012 T4 (McNaught) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2012-10-10T22:22:44.699520Z |
| Orbit solution date (soln_date, UTC) |
2022-06-07T21:44:03Z |
| Obs used |
49 |
| NEO |
- |
| M1 |
15.500 |
| K1 |
6.250 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2012-10-18.0000000 |
| e |
0.99118923 |
| q (au) |
1.955997 |
| a (au) |
222.000586 |
| i (deg) |
24.085273 |
| Ω (om, deg) |
99.368559 |
| ω (w, deg) |
219.915260 |
| M (ma, deg) |
0.002106 |
밝기
산란 + 전체 선형
$$
M_a = (14.048 + 4.167\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
14.048 |
| n |
4.167 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.990 |
| 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 |
07:22:30.92 |
+26:34:56.4 |
HIP 35639 |
17.66 |
| 2026-06-01 12:00 |
07:22:34.50 |
+26:34:48.4 |
HIP 35639 |
18.38 |
| 2026-06-02 00:00 |
07:22:38.09 |
+26:34:40.4 |
HIP 35639 |
19.12 |
| 2026-06-02 12:00 |
07:22:41.71 |
+26:34:32.3 |
HIP 35639 |
19.87 |
| 2026-06-03 00:00 |
07:22:45.34 |
+26:34:24.3 |
HIP 35639 |
20.63 |
| 2026-06-03 12:00 |
07:22:49.00 |
+26:34:16.2 |
HIP 35639 |
21.39 |
| 2026-06-04 00:00 |
07:22:52.67 |
+26:34:08.1 |
HIP 35639 |
22.17 |
| 2026-06-04 12:00 |
07:22:56.37 |
+26:34:00.0 |
HIP 35639 |
22.96 |
| 2026-06-05 00:00 |
07:23:00.08 |
+26:33:51.9 |
HIP 35639 |
23.75 |
| 2026-06-05 12:00 |
07:23:03.81 |
+26:33:43.8 |
HIP 35967 |
23.75 |
| 2026-06-06 00:00 |
07:23:07.56 |
+26:33:35.7 |
HIP 35967 |
22.95 |
| 2026-06-06 12:00 |
07:23:11.33 |
+26:33:27.6 |
HIP 35967 |
22.14 |
| 2026-06-07 00:00 |
07:23:15.12 |
+26:33:19.5 |
HIP 35967 |
21.34 |
| 2026-06-07 12:00 |
07:23:18.92 |
+26:33:11.3 |
HIP 35967 |
20.54 |
| 2026-06-08 00:00 |
07:23:22.74 |
+26:33:03.2 |
HIP 35967 |
19.74 |
| 2026-06-08 12:00 |
07:23:26.58 |
+26:32:55.0 |
HIP 35967 |
18.94 |
| 2026-06-09 00:00 |
07:23:30.44 |
+26:32:46.8 |
HIP 35967 |
18.14 |
| 2026-06-09 12:00 |
07:23:34.31 |
+26:32:38.7 |
HIP 35967 |
17.34 |
| 2026-06-10 00:00 |
07:23:38.20 |
+26:32:30.5 |
HIP 35967 |
16.56 |
| 2026-06-10 12:00 |
07:23:42.11 |
+26:32:22.3 |
HIP 35967 |
15.77 |
| 2026-06-11 00:00 |
07:23:46.03 |
+26:32:14.1 |
HIP 35967 |
15.00 |
| 2026-06-11 12:00 |
07:23:49.97 |
+26:32:05.9 |
HIP 35967 |
14.23 |
| 2026-06-12 00:00 |
07:23:53.93 |
+26:31:57.7 |
HIP 35967 |
13.48 |
| 2026-06-12 12:00 |
07:23:57.90 |
+26:31:49.5 |
HIP 35967 |
12.74 |
| 2026-06-13 00:00 |
07:24:01.89 |
+26:31:41.3 |
HIP 35967 |
12.03 |
| 2026-06-13 12:00 |
07:24:05.89 |
+26:31:33.1 |
HIP 35967 |
11.33 |
| 2026-06-14 00:00 |
07:24:09.90 |
+26:31:24.8 |
HIP 35967 |
10.66 |
| 2026-06-14 12:00 |
07:24:13.93 |
+26:31:16.6 |
HIP 35967 |
10.03 |
| 2026-06-15 00:00 |
07:24:17.98 |
+26:31:08.4 |
HIP 35967 |
9.45 |
| 2026-06-15 12:00 |
07:24:22.04 |
+26:31:00.2 |
HIP 35967 |
8.91 |
| 2026-06-16 00:00 |
07:24:26.11 |
+26:30:52.0 |
HIP 35967 |
8.44 |
| 2026-06-16 12:00 |
07:24:30.20 |
+26:30:43.7 |
HIP 35967 |
8.05 |
| 2026-06-17 00:00 |
07:24:34.29 |
+26:30:35.5 |
HIP 35967 |
7.75 |
| 2026-06-17 12:00 |
07:24:38.41 |
+26:30:27.3 |
HIP 35967 |
7.55 |
| 2026-06-18 00:00 |
07:24:42.53 |
+26:30:19.1 |
HIP 35967 |
7.46 |
| 2026-06-18 12:00 |
07:24:46.67 |
+26:30:10.9 |
HIP 35967 |
7.48 |
| 2026-06-19 00:00 |
07:24:50.82 |
+26:30:02.7 |
HIP 35967 |
7.62 |
| 2026-06-19 12:00 |
07:24:54.98 |
+26:29:54.5 |
HIP 35967 |
7.87 |
| 2026-06-20 00:00 |
07:24:59.15 |
+26:29:46.3 |
HIP 35967 |
8.22 |
| 2026-06-20 12:00 |
07:25:03.33 |
+26:29:38.1 |
HIP 35967 |
8.67 |
| 2026-06-21 00:00 |
07:25:07.52 |
+26:29:29.9 |
HIP 35967 |
9.18 |
| 2026-06-21 12:00 |
07:25:11.73 |
+26:29:21.8 |
HIP 35967 |
9.77 |
| 2026-06-22 00:00 |
07:25:15.94 |
+26:29:13.6 |
HIP 35967 |
10.41 |