메타데이터
| 항목 |
값 |
| Designation |
C/1994 T1 (Machholz) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1994-10-02T13:22:18.399360Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:47Z |
| Obs used |
344 |
| NEO |
- |
| M1 |
10.400 |
| K1 |
5.750 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1994-11-26.0000000 |
| e |
0.99949492 |
| q (au) |
1.845392 |
| a (au) |
3653.643991 |
| i (deg) |
101.737600 |
| Ω (om, deg) |
249.943625 |
| ω (w, deg) |
142.784278 |
| M (ma, deg) |
0.000243 |
밝기
산란 + 전체 선형
$$
M_a = (9.712 + 3.102\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
9.712 |
| n |
3.102 |
| gf |
1.000 |
| gb |
-0.544 |
| k |
0.800 |
| 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) |
| 2026-09-20 00:00 |
17:12:22.91 |
-79:38:50.0 |
HIP 83466 |
26.23 |
| 2026-09-20 12:00 |
17:12:24.70 |
-79:38:22.4 |
HIP 83466 |
26.13 |
| 2026-09-21 00:00 |
17:12:26.58 |
-79:37:54.9 |
HIP 83466 |
26.05 |
| 2026-09-21 12:00 |
17:12:28.56 |
-79:37:27.5 |
HIP 83466 |
25.97 |
| 2026-09-22 00:00 |
17:12:30.64 |
-79:37:00.1 |
HIP 83466 |
25.91 |
| 2026-09-22 12:00 |
17:12:32.82 |
-79:36:32.7 |
HIP 83466 |
25.86 |
| 2026-09-23 00:00 |
17:12:35.09 |
-79:36:05.4 |
HIP 83466 |
25.82 |
| 2026-09-23 12:00 |
17:12:37.46 |
-79:35:38.2 |
HIP 83466 |
25.80 |
| 2026-09-24 00:00 |
17:12:39.92 |
-79:35:11.0 |
HIP 83466 |
25.79 |
| 2026-09-24 12:00 |
17:12:42.48 |
-79:34:43.9 |
HIP 83466 |
25.79 |
| 2026-09-25 00:00 |
17:12:45.13 |
-79:34:16.9 |
HIP 83466 |
25.81 |
| 2026-09-25 12:00 |
17:12:47.88 |
-79:33:49.9 |
HIP 83466 |
25.83 |
| 2026-09-26 00:00 |
17:12:50.72 |
-79:33:23.0 |
HIP 83466 |
25.88 |
| 2026-09-26 12:00 |
17:12:53.65 |
-79:32:56.2 |
HIP 83466 |
25.93 |
| 2026-09-27 00:00 |
17:12:56.68 |
-79:32:29.4 |
HIP 83466 |
26.00 |
| 2026-09-27 12:00 |
17:12:59.80 |
-79:32:02.7 |
HIP 83466 |
26.08 |
| 2026-09-28 00:00 |
17:13:03.01 |
-79:31:36.1 |
HIP 83466 |
26.17 |
| 2026-09-28 12:00 |
17:13:06.32 |
-79:31:09.6 |
HIP 83466 |
26.27 |
| 2026-09-29 00:00 |
17:13:09.72 |
-79:30:43.1 |
HIP 83466 |
26.39 |
| 2026-09-29 12:00 |
17:13:13.20 |
-79:30:16.7 |
HIP 83466 |
26.52 |
| 2026-09-30 00:00 |
17:13:16.78 |
-79:29:50.4 |
HIP 84369 |
26.25 |
| 2026-09-30 12:00 |
17:13:20.45 |
-79:29:24.2 |
HIP 84369 |
25.79 |
| 2026-10-01 00:00 |
17:13:24.21 |
-79:28:58.1 |
HIP 84369 |
25.33 |
| 2026-10-01 12:00 |
17:13:28.06 |
-79:28:32.0 |
HIP 84369 |
24.87 |
| 2026-10-02 00:00 |
17:13:32.00 |
-79:28:06.1 |
HIP 84369 |
24.41 |
| 2026-10-02 12:00 |
17:13:36.03 |
-79:27:40.2 |
HIP 84369 |
23.96 |
| 2026-10-03 00:00 |
17:13:40.15 |
-79:27:14.4 |
HIP 84369 |
23.51 |
| 2026-10-03 12:00 |
17:13:44.35 |
-79:26:48.7 |
HIP 84369 |
23.05 |
| 2026-10-04 00:00 |
17:13:48.65 |
-79:26:23.1 |
HIP 84369 |
22.60 |
| 2026-10-04 12:00 |
17:13:53.03 |
-79:25:57.6 |
HIP 84369 |
22.16 |
| 2026-10-05 00:00 |
17:13:57.49 |
-79:25:32.2 |
HIP 84369 |
21.71 |
| 2026-10-05 12:00 |
17:14:02.05 |
-79:25:06.9 |
HIP 84369 |
21.27 |
| 2026-10-06 00:00 |
17:14:06.69 |
-79:24:41.7 |
HIP 84369 |
20.82 |
| 2026-10-06 12:00 |
17:14:11.42 |
-79:24:16.6 |
HIP 84369 |
20.38 |
| 2026-10-07 00:00 |
17:14:16.23 |
-79:23:51.6 |
HIP 84369 |
19.95 |
| 2026-10-07 12:00 |
17:14:21.13 |
-79:23:26.7 |
HIP 84369 |
19.52 |
| 2026-10-08 00:00 |
17:14:26.11 |
-79:23:02.0 |
HIP 84369 |
19.09 |
| 2026-10-08 12:00 |
17:14:31.18 |
-79:22:37.3 |
HIP 84369 |
18.66 |
| 2026-10-09 00:00 |
17:14:36.33 |
-79:22:12.7 |
HIP 84369 |
18.24 |
| 2026-10-09 12:00 |
17:14:41.57 |
-79:21:48.3 |
HIP 84369 |
17.82 |
| 2026-10-10 00:00 |
17:14:46.88 |
-79:21:23.9 |
HIP 84369 |
17.41 |
| 2026-10-10 12:00 |
17:14:52.28 |
-79:20:59.7 |
HIP 84369 |
17.00 |
| 2026-10-11 00:00 |
17:14:57.76 |
-79:20:35.6 |
HIP 84369 |
16.60 |