메타데이터
| 항목 |
값 |
| Designation |
268P/Bernardi |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2015-04-26T21:23:12.413760Z |
| Orbit solution date (soln_date, UTC) |
2026-04-27T13:42:34Z |
| Obs used |
218 |
| NEO |
- |
| M1 |
17.200 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2016-08-31.0000000 |
| e |
0.46979297 |
| q (au) |
2.418605 |
| a (au) |
4.561624 |
| i (deg) |
16.096802 |
| Ω (om, deg) |
127.628210 |
| ω (w, deg) |
0.311064 |
| M (ma, deg) |
49.783578 |
밝기
산란 + 전체 선형
$$
M_a = (16.702 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
16.702 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.806 |
| k |
0.998 |
| 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
찾아보기
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
15:18:39.41 |
-02:24:50.5 |
HIP 74972 |
17.23 |
| 2026-07-29 12:00 |
15:18:44.57 |
-02:27:17.5 |
HIP 74972 |
18.83 |
| 2026-07-30 00:00 |
15:18:49.93 |
-02:29:44.9 |
HIP 74924 |
18.49 |
| 2026-07-30 12:00 |
15:18:55.48 |
-02:32:12.8 |
HIP 74924 |
16.35 |
| 2026-07-31 00:00 |
15:19:01.22 |
-02:34:41.1 |
HIP 74924 |
14.47 |
| 2026-07-31 12:00 |
15:19:07.16 |
-02:37:09.8 |
HIP 74924 |
12.96 |
| 2026-08-01 00:00 |
15:19:13.29 |
-02:39:39.0 |
HIP 74924 |
12.00 |
| 2026-08-01 12:00 |
15:19:19.61 |
-02:42:08.5 |
HIP 74924 |
11.75 |
| 2026-08-02 00:00 |
15:19:26.13 |
-02:44:38.5 |
HIP 74924 |
12.27 |
| 2026-08-02 12:00 |
15:19:32.83 |
-02:47:08.8 |
HIP 74924 |
13.50 |
| 2026-08-03 00:00 |
15:19:39.72 |
-02:49:39.5 |
HIP 74924 |
15.28 |
| 2026-08-03 12:00 |
15:19:46.80 |
-02:52:10.6 |
HIP 74924 |
17.46 |
| 2026-08-04 00:00 |
15:19:54.07 |
-02:54:42.1 |
HIP 74924 |
19.92 |
| 2026-08-04 12:00 |
15:20:01.53 |
-02:57:13.9 |
HIP 74924 |
22.59 |
| 2026-08-05 00:00 |
15:20:09.17 |
-02:59:46.0 |
HIP 74924 |
25.41 |
| 2026-08-05 12:00 |
15:20:17.00 |
-03:02:18.5 |
HIP 74924 |
28.35 |
| 2026-08-06 00:00 |
15:20:25.01 |
-03:04:51.3 |
HIP 75089 |
26.55 |
| 2026-08-06 12:00 |
15:20:33.21 |
-03:07:24.5 |
HIP 75089 |
23.81 |
| 2026-08-07 00:00 |
15:20:41.59 |
-03:09:57.9 |
HIP 75089 |
21.22 |
| 2026-08-07 12:00 |
15:20:50.15 |
-03:12:31.7 |
HIP 75089 |
18.86 |
| 2026-08-08 00:00 |
15:20:58.90 |
-03:15:05.7 |
HIP 75089 |
16.84 |
| 2026-08-08 12:00 |
15:21:07.82 |
-03:17:40.1 |
HIP 75089 |
15.31 |
| 2026-08-09 00:00 |
15:21:16.93 |
-03:20:14.7 |
HIP 75089 |
14.48 |
| 2026-08-09 12:00 |
15:21:26.22 |
-03:22:49.5 |
HIP 75089 |
14.46 |
| 2026-08-10 00:00 |
15:21:35.68 |
-03:25:24.7 |
HIP 75089 |
15.30 |
| 2026-08-10 12:00 |
15:21:45.33 |
-03:28:00.1 |
HIP 75089 |
16.88 |
| 2026-08-11 00:00 |
15:21:55.15 |
-03:30:35.7 |
HIP 75089 |
19.04 |
| 2026-08-11 12:00 |
15:22:05.15 |
-03:33:11.6 |
HIP 75089 |
21.62 |
| 2026-08-12 00:00 |
15:22:15.32 |
-03:35:47.7 |
HIP 75316 |
23.51 |
| 2026-08-12 12:00 |
15:22:25.67 |
-03:38:23.9 |
HIP 75316 |
24.14 |
| 2026-08-13 00:00 |
15:22:36.20 |
-03:41:00.5 |
HIP 75316 |
25.28 |
| 2026-08-13 12:00 |
15:22:46.90 |
-03:43:37.1 |
HIP 75316 |
26.88 |
| 2026-08-14 00:00 |
15:22:57.77 |
-03:46:14.0 |
HIP 75316 |
28.87 |
| 2026-08-14 12:00 |
15:23:08.81 |
-03:48:51.1 |
HIP 75316 |
31.19 |
| 2026-08-15 00:00 |
15:23:20.02 |
-03:51:28.3 |
HIP 75385 |
32.49 |
| 2026-08-15 12:00 |
15:23:31.40 |
-03:54:05.7 |
HIP 75385 |
28.94 |
| 2026-08-16 00:00 |
15:23:42.95 |
-03:56:43.2 |
HIP 75385 |
25.45 |
| 2026-08-16 12:00 |
15:23:54.67 |
-03:59:20.9 |
HIP 75385 |
22.10 |
| 2026-08-17 00:00 |
15:24:06.55 |
-04:01:58.7 |
HIP 75385 |
18.96 |
| 2026-08-17 12:00 |
15:24:18.60 |
-04:04:36.6 |
HIP 75385 |
16.18 |
| 2026-08-18 00:00 |
15:24:30.82 |
-04:07:14.7 |
HIP 75385 |
14.01 |
| 2026-08-18 12:00 |
15:24:43.19 |
-04:09:52.8 |
HIP 75385 |
12.80 |
| 2026-08-19 00:00 |
15:24:55.73 |
-04:12:31.0 |
HIP 75385 |
12.85 |