메타데이터
| 항목 |
값 |
| Designation |
C/2022 J2 (Bok) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2022-10-27T01:33:00.308160Z |
| Orbit solution date (soln_date, UTC) |
2023-06-01T23:12:41Z |
| Obs used |
135 |
| NEO |
- |
| M1 |
15.600 |
| K1 |
10.750 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2022-05-09T04:30:45.273600Z |
| Discovery magnitude (MPC) |
21.56 G |
| Discovery observatory (MPC) |
V00 · Kitt Peak-Bok |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2022-07-28.0000000 |
| e |
0.98023028 |
| q (au) |
1.827561 |
| a (au) |
92.442404 |
| i (deg) |
149.092718 |
| Ω (om, deg) |
252.557091 |
| ω (w, deg) |
133.064666 |
| M (ma, deg) |
359.899017 |
밝기
산란 + 전체 선형
$$
M_a = (15.303 + 4.447\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
15.303 |
| n |
4.447 |
| gf |
0.800 |
| gb |
-0.500 |
| k |
0.958 |
| 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 |
23:57:12.34 |
-37:09:39.3 |
HIP 118147 |
9.30 |
| 2026-09-20 12:00 |
23:56:58.52 |
-37:10:40.1 |
HIP 118147 |
12.23 |
| 2026-09-21 00:00 |
23:56:44.70 |
-37:11:40.0 |
HIP 118147 |
15.15 |
| 2026-09-21 12:00 |
23:56:30.89 |
-37:12:38.9 |
HIP 118147 |
18.07 |
| 2026-09-22 00:00 |
23:56:17.09 |
-37:13:36.9 |
HIP 117919 |
16.58 |
| 2026-09-22 12:00 |
23:56:03.29 |
-37:14:34.0 |
HIP 117919 |
13.73 |
| 2026-09-23 00:00 |
23:55:49.50 |
-37:15:30.0 |
HIP 117919 |
10.94 |
| 2026-09-23 12:00 |
23:55:35.72 |
-37:16:25.2 |
HIP 117919 |
8.22 |
| 2026-09-24 00:00 |
23:55:21.94 |
-37:17:19.3 |
HIP 117919 |
5.69 |
| 2026-09-24 12:00 |
23:55:08.18 |
-37:18:12.5 |
HIP 117919 |
3.74 |
| 2026-09-25 00:00 |
23:54:54.44 |
-37:19:04.7 |
HIP 117919 |
3.49 |
| 2026-09-25 12:00 |
23:54:40.70 |
-37:19:56.0 |
HIP 117919 |
5.18 |
| 2026-09-26 00:00 |
23:54:26.99 |
-37:20:46.3 |
HIP 117838 |
7.19 |
| 2026-09-26 12:00 |
23:54:13.28 |
-37:21:35.6 |
HIP 117838 |
4.49 |
| 2026-09-27 00:00 |
23:53:59.60 |
-37:22:24.0 |
HIP 117838 |
2.20 |
| 2026-09-27 12:00 |
23:53:45.93 |
-37:23:11.3 |
HIP 117838 |
2.38 |
| 2026-09-28 00:00 |
23:53:32.29 |
-37:23:57.7 |
HIP 117838 |
4.74 |
| 2026-09-28 12:00 |
23:53:18.66 |
-37:24:43.2 |
HIP 117838 |
7.42 |
| 2026-09-29 00:00 |
23:53:05.06 |
-37:25:27.6 |
HIP 117838 |
10.16 |
| 2026-09-29 12:00 |
23:52:51.48 |
-37:26:11.0 |
HIP 117838 |
12.92 |
| 2026-09-30 00:00 |
23:52:37.92 |
-37:26:53.5 |
HIP 117838 |
15.69 |
| 2026-09-30 12:00 |
23:52:24.39 |
-37:27:35.0 |
HIP 117838 |
18.45 |
| 2026-10-01 00:00 |
23:52:10.88 |
-37:28:15.5 |
HIP 117838 |
21.20 |
| 2026-10-01 12:00 |
23:51:57.41 |
-37:28:55.0 |
HIP 117838 |
23.95 |
| 2026-10-02 00:00 |
23:51:43.96 |
-37:29:33.5 |
HIP 117525 |
22.10 |
| 2026-10-02 12:00 |
23:51:30.54 |
-37:30:11.0 |
HIP 117525 |
20.07 |
| 2026-10-03 00:00 |
23:51:17.15 |
-37:30:47.6 |
HIP 117525 |
18.21 |
| 2026-10-03 12:00 |
23:51:03.80 |
-37:31:23.1 |
HIP 117525 |
16.60 |
| 2026-10-04 00:00 |
23:50:50.48 |
-37:31:57.6 |
HIP 117525 |
15.29 |
| 2026-10-04 12:00 |
23:50:37.19 |
-37:32:31.2 |
HIP 117525 |
14.36 |
| 2026-10-05 00:00 |
23:50:23.94 |
-37:33:03.7 |
HIP 117525 |
13.89 |
| 2026-10-05 12:00 |
23:50:10.73 |
-37:33:35.3 |
HIP 117525 |
13.92 |
| 2026-10-06 00:00 |
23:49:57.55 |
-37:34:05.8 |
HIP 117525 |
14.43 |
| 2026-10-06 12:00 |
23:49:44.41 |
-37:34:35.3 |
HIP 117525 |
15.38 |
| 2026-10-07 00:00 |
23:49:31.32 |
-37:35:03.9 |
HIP 117525 |
16.67 |
| 2026-10-07 12:00 |
23:49:18.26 |
-37:35:31.4 |
HIP 117525 |
18.25 |
| 2026-10-08 00:00 |
23:49:05.25 |
-37:35:57.9 |
HIP 117525 |
20.02 |
| 2026-10-08 12:00 |
23:48:52.29 |
-37:36:23.5 |
HIP 117525 |
21.95 |
| 2026-10-09 00:00 |
23:48:39.36 |
-37:36:48.0 |
HIP 117525 |
23.99 |
| 2026-10-09 12:00 |
23:48:26.49 |
-37:37:11.5 |
HIP 117525 |
26.10 |
| 2026-10-10 00:00 |
23:48:13.66 |
-37:37:34.0 |
HIP 117525 |
28.28 |
| 2026-10-10 12:00 |
23:48:00.88 |
-37:37:55.5 |
HIP 117525 |
30.50 |
| 2026-10-11 00:00 |
23:47:48.15 |
-37:38:16.1 |
HIP 117213 |
29.50 |