메타데이터
| 항목 |
값 |
| Designation |
74P/Smirnova-Chernykh |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2009-07-26T18:53:38.227200Z |
| Orbit solution date (soln_date, UTC) |
2026-03-07T15:24:14Z |
| Obs used |
6028 |
| NEO |
- |
| M1 |
6.700 |
| K1 |
14.250 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2013-01-30.0000000 |
| e |
0.14785301 |
| q (au) |
3.549250 |
| a (au) |
4.165067 |
| i (deg) |
6.651004 |
| Ω (om, deg) |
77.083800 |
| ω (w, deg) |
86.558859 |
| M (ma, deg) |
148.788615 |
밝기
산란 + 전체 선형
$$
M_a = (6.727 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
6.727 |
| n |
6.000 |
| gf |
0.983 |
| gb |
-0.986 |
| k |
1.000 |
| δ90 |
1.000 |
| 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 |
09:17:11.83 |
+20:59:12.5 |
HIP 45671 |
22.28 |
| 2026-09-20 12:00 |
09:17:38.23 |
+20:57:35.0 |
HIP 45671 |
16.13 |
| 2026-09-21 00:00 |
09:18:04.54 |
+20:55:57.7 |
HIP 45671 |
10.28 |
| 2026-09-21 12:00 |
09:18:30.77 |
+20:54:20.8 |
HIP 45671 |
5.66 |
| 2026-09-22 00:00 |
09:18:56.92 |
+20:52:44.1 |
HIP 45671 |
6.21 |
| 2026-09-22 12:00 |
09:19:22.99 |
+20:51:07.7 |
HIP 45671 |
11.16 |
| 2026-09-23 00:00 |
09:19:48.97 |
+20:49:31.6 |
HIP 45747 |
16.88 |
| 2026-09-23 12:00 |
09:20:14.88 |
+20:47:55.8 |
HIP 45747 |
17.25 |
| 2026-09-24 00:00 |
09:20:40.70 |
+20:46:20.3 |
HIP 45747 |
19.71 |
| 2026-09-24 12:00 |
09:21:06.43 |
+20:44:45.1 |
HIP 45747 |
23.60 |
| 2026-09-25 00:00 |
09:21:32.08 |
+20:43:10.3 |
HIP 45747 |
28.32 |
| 2026-09-25 12:00 |
09:21:57.65 |
+20:41:35.7 |
HIP 46076 |
32.36 |
| 2026-09-26 00:00 |
09:22:23.13 |
+20:40:01.5 |
HIP 46076 |
26.78 |
| 2026-09-26 12:00 |
09:22:48.52 |
+20:38:27.6 |
HIP 46076 |
21.55 |
| 2026-09-27 00:00 |
09:23:13.82 |
+20:36:54.1 |
HIP 46076 |
16.95 |
| 2026-09-27 12:00 |
09:23:39.04 |
+20:35:20.9 |
HIP 46076 |
13.62 |
| 2026-09-28 00:00 |
09:24:04.16 |
+20:33:48.1 |
HIP 46076 |
12.58 |
| 2026-09-28 12:00 |
09:24:29.20 |
+20:32:15.6 |
HIP 46076 |
14.32 |
| 2026-09-29 00:00 |
09:24:54.15 |
+20:30:43.5 |
HIP 46249 |
14.32 |
| 2026-09-29 12:00 |
09:25:19.01 |
+20:29:11.8 |
HIP 46249 |
8.83 |
| 2026-09-30 00:00 |
09:25:43.77 |
+20:27:40.4 |
HIP 46249 |
4.84 |
| 2026-09-30 12:00 |
09:26:08.45 |
+20:26:09.4 |
HIP 46292 |
4.04 |
| 2026-10-01 00:00 |
09:26:33.03 |
+20:24:38.8 |
HIP 46292 |
2.86 |
| 2026-10-01 12:00 |
09:26:57.52 |
+20:23:08.6 |
HIP 46292 |
8.40 |
| 2026-10-02 00:00 |
09:27:21.91 |
+20:21:38.8 |
HIP 46292 |
14.24 |
| 2026-10-02 12:00 |
09:27:46.21 |
+20:20:09.4 |
HIP 46292 |
20.09 |
| 2026-10-03 00:00 |
09:28:10.41 |
+20:18:40.4 |
HIP 46478 |
25.14 |
| 2026-10-03 12:00 |
09:28:34.51 |
+20:17:11.9 |
HIP 46478 |
25.39 |
| 2026-10-04 00:00 |
09:28:58.52 |
+20:15:43.7 |
HIP 46478 |
26.93 |
| 2026-10-04 12:00 |
09:29:22.43 |
+20:14:16.0 |
HIP 46478 |
29.53 |
| 2026-10-05 00:00 |
09:29:46.23 |
+20:12:48.8 |
HIP 46739 |
25.74 |
| 2026-10-05 12:00 |
09:30:09.94 |
+20:11:21.9 |
HIP 46739 |
20.54 |
| 2026-10-06 00:00 |
09:30:33.55 |
+20:09:55.6 |
HIP 46739 |
15.74 |
| 2026-10-06 12:00 |
09:30:57.05 |
+20:08:29.7 |
HIP 46739 |
11.80 |
| 2026-10-07 00:00 |
09:31:20.45 |
+20:07:04.3 |
HIP 46751 |
8.71 |
| 2026-10-07 12:00 |
09:31:43.75 |
+20:05:39.3 |
HIP 46781 |
5.04 |
| 2026-10-08 00:00 |
09:32:06.94 |
+20:04:14.9 |
HIP 46781 |
1.91 |
| 2026-10-08 12:00 |
09:32:30.02 |
+20:02:50.9 |
HIP 46783 |
6.59 |
| 2026-10-09 00:00 |
09:32:53.00 |
+20:01:27.4 |
HIP 46838 |
10.51 |
| 2026-10-09 12:00 |
09:33:15.87 |
+20:00:04.5 |
HIP 46838 |
12.02 |
| 2026-10-10 00:00 |
09:33:38.64 |
+19:58:42.0 |
HIP 46838 |
15.47 |
| 2026-10-10 12:00 |
09:34:01.29 |
+19:57:20.1 |
HIP 46838 |
19.86 |
| 2026-10-11 00:00 |
09:34:23.83 |
+19:55:58.7 |
HIP 47104 |
24.06 |