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) |
| 2026-03-26 00:00 |
07:18:56.20 |
+26:47:19.6 |
HIP 35494 |
7.98 |
| 2026-03-26 12:00 |
07:18:55.45 |
+26:47:17.9 |
HIP 35494 |
8.15 |
| 2026-03-27 00:00 |
07:18:54.74 |
+26:47:16.1 |
HIP 35494 |
8.31 |
| 2026-03-27 12:00 |
07:18:54.06 |
+26:47:14.2 |
HIP 35494 |
8.47 |
| 2026-03-28 00:00 |
07:18:53.42 |
+26:47:12.2 |
HIP 35494 |
8.61 |
| 2026-03-28 12:00 |
07:18:52.82 |
+26:47:10.2 |
HIP 35494 |
8.75 |
| 2026-03-29 00:00 |
07:18:52.26 |
+26:47:08.1 |
HIP 35494 |
8.88 |
| 2026-03-29 12:00 |
07:18:51.74 |
+26:47:05.9 |
HIP 35494 |
9.00 |
| 2026-03-30 00:00 |
07:18:51.26 |
+26:47:03.7 |
HIP 35494 |
9.12 |
| 2026-03-30 12:00 |
07:18:50.81 |
+26:47:01.4 |
HIP 35494 |
9.22 |
| 2026-03-31 00:00 |
07:18:50.40 |
+26:46:59.0 |
HIP 35494 |
9.32 |
| 2026-03-31 12:00 |
07:18:50.04 |
+26:46:56.5 |
HIP 35494 |
9.41 |
| 2026-04-01 00:00 |
07:18:49.70 |
+26:46:54.0 |
HIP 35494 |
9.49 |
| 2026-04-01 12:00 |
07:18:49.41 |
+26:46:51.4 |
HIP 35494 |
9.57 |
| 2026-04-02 00:00 |
07:18:49.16 |
+26:46:48.7 |
HIP 35494 |
9.64 |
| 2026-04-02 12:00 |
07:18:48.94 |
+26:46:45.9 |
HIP 35494 |
9.69 |
| 2026-04-03 00:00 |
07:18:48.76 |
+26:46:43.1 |
HIP 35494 |
9.75 |
| 2026-04-03 12:00 |
07:18:48.62 |
+26:46:40.2 |
HIP 35494 |
9.79 |
| 2026-04-04 00:00 |
07:18:48.52 |
+26:46:37.3 |
HIP 35494 |
9.82 |
| 2026-04-04 12:00 |
07:18:48.46 |
+26:46:34.2 |
HIP 35494 |
9.85 |
| 2026-04-05 00:00 |
07:18:48.43 |
+26:46:31.1 |
HIP 35494 |
9.87 |
| 2026-04-05 12:00 |
07:18:48.44 |
+26:46:27.9 |
HIP 35494 |
9.89 |
| 2026-04-06 00:00 |
07:18:48.49 |
+26:46:24.7 |
HIP 35494 |
9.89 |
| 2026-04-06 12:00 |
07:18:48.58 |
+26:46:21.4 |
HIP 35494 |
9.89 |
| 2026-04-07 00:00 |
07:18:48.71 |
+26:46:18.0 |
HIP 35494 |
9.88 |
| 2026-04-07 12:00 |
07:18:48.87 |
+26:46:14.6 |
HIP 35494 |
9.86 |
| 2026-04-08 00:00 |
07:18:49.08 |
+26:46:11.1 |
HIP 35494 |
9.84 |
| 2026-04-08 12:00 |
07:18:49.32 |
+26:46:07.5 |
HIP 35494 |
9.81 |
| 2026-04-09 00:00 |
07:18:49.60 |
+26:46:03.9 |
HIP 35494 |
9.77 |
| 2026-04-09 12:00 |
07:18:49.91 |
+26:46:00.1 |
HIP 35494 |
9.72 |
| 2026-04-10 00:00 |
07:18:50.27 |
+26:45:56.4 |
HIP 35494 |
9.67 |
| 2026-04-10 12:00 |
07:18:50.66 |
+26:45:52.5 |
HIP 35494 |
9.61 |
| 2026-04-11 00:00 |
07:18:51.09 |
+26:45:48.6 |
HIP 35494 |
9.55 |
| 2026-04-11 12:00 |
07:18:51.55 |
+26:45:44.7 |
HIP 35494 |
9.48 |
| 2026-04-12 00:00 |
07:18:52.06 |
+26:45:40.6 |
HIP 35494 |
9.40 |
| 2026-04-12 12:00 |
07:18:52.60 |
+26:45:36.5 |
HIP 35494 |
9.32 |
| 2026-04-13 00:00 |
07:18:53.18 |
+26:45:32.4 |
HIP 35494 |
9.23 |
| 2026-04-13 12:00 |
07:18:53.80 |
+26:45:28.2 |
HIP 35494 |
9.13 |
| 2026-04-14 00:00 |
07:18:54.45 |
+26:45:23.9 |
HIP 35494 |
9.03 |
| 2026-04-14 12:00 |
07:18:55.14 |
+26:45:19.5 |
HIP 35494 |
8.92 |
| 2026-04-15 00:00 |
07:18:55.87 |
+26:45:15.1 |
HIP 35494 |
8.81 |
| 2026-04-15 12:00 |
07:18:56.64 |
+26:45:10.7 |
HIP 35494 |
8.70 |
| 2026-04-16 00:00 |
07:18:57.44 |
+26:45:06.1 |
HIP 35494 |
8.58 |