메타데이터
| 항목 |
값 |
| Designation |
C/2026 A2 (Bok) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2026-12-22T08:33:55.391040Z |
| Orbit solution date (soln_date, UTC) |
2026-07-28T14:12:17Z |
| Obs used |
781 |
| NEO |
- |
| M1 |
8.300 |
| K1 |
13.750 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2026-01-15T12:52:17.616000Z |
| Discovery magnitude (MPC) |
20.38 G |
| Discovery observatory (MPC) |
V00 · Kitt Peak-Bok |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2026-05-13.0000000 |
| e |
0.99760902 |
| q (au) |
1.937839 |
| a (au) |
810.480335 |
| i (deg) |
82.306038 |
| Ω (om, deg) |
206.590044 |
| ω (w, deg) |
155.936267 |
| M (ma, deg) |
359.990459 |
밝기
산란 + 전체 선형
$$
M_a = (7.987 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
7.987 |
| n |
6.000 |
| gf |
0.890 |
| gb |
-0.500 |
| k |
0.835 |
| 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
찾아보기
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
16:10:57.12 |
+78:39:23.8 |
HIP 78748 |
18.67 |
| 2026-07-29 12:00 |
16:10:18.05 |
+78:37:25.3 |
HIP 78748 |
17.04 |
| 2026-07-30 00:00 |
16:09:40.61 |
+78:35:23.8 |
HIP 78748 |
15.81 |
| 2026-07-30 12:00 |
16:09:04.78 |
+78:33:19.3 |
HIP 78748 |
15.07 |
| 2026-07-31 00:00 |
16:08:30.57 |
+78:31:11.9 |
HIP 78748 |
14.88 |
| 2026-07-31 12:00 |
16:07:58.00 |
+78:29:01.7 |
HIP 78748 |
15.27 |
| 2026-08-01 00:00 |
16:07:27.06 |
+78:26:48.6 |
HIP 78748 |
16.18 |
| 2026-08-01 12:00 |
16:06:57.76 |
+78:24:32.8 |
HIP 78748 |
17.54 |
| 2026-08-02 00:00 |
16:06:30.09 |
+78:22:14.3 |
HIP 78748 |
19.24 |
| 2026-08-02 12:00 |
16:06:04.07 |
+78:19:53.1 |
HIP 78748 |
21.21 |
| 2026-08-03 00:00 |
16:05:39.69 |
+78:17:29.3 |
HIP 78588 |
21.51 |
| 2026-08-03 12:00 |
16:05:16.95 |
+78:15:03.0 |
HIP 78588 |
18.81 |
| 2026-08-04 00:00 |
16:04:55.86 |
+78:12:34.1 |
HIP 78588 |
16.10 |
| 2026-08-04 12:00 |
16:04:36.40 |
+78:10:02.7 |
HIP 78588 |
13.40 |
| 2026-08-05 00:00 |
16:04:18.60 |
+78:07:28.9 |
HIP 78588 |
10.69 |
| 2026-08-05 12:00 |
16:04:02.43 |
+78:04:52.8 |
HIP 78588 |
8.01 |
| 2026-08-06 00:00 |
16:03:47.91 |
+78:02:14.2 |
HIP 78588 |
5.38 |
| 2026-08-06 12:00 |
16:03:35.02 |
+77:59:33.4 |
HIP 78588 |
3.04 |
| 2026-08-07 00:00 |
16:03:23.77 |
+77:56:50.2 |
HIP 78588 |
2.27 |
| 2026-08-07 12:00 |
16:03:14.16 |
+77:54:04.8 |
HIP 78588 |
4.13 |
| 2026-08-08 00:00 |
16:03:06.17 |
+77:51:17.3 |
HIP 78588 |
6.73 |
| 2026-08-08 12:00 |
16:02:59.82 |
+77:48:27.5 |
HIP 78588 |
9.50 |
| 2026-08-09 00:00 |
16:02:55.09 |
+77:45:35.6 |
HIP 78588 |
12.35 |
| 2026-08-09 12:00 |
16:02:51.99 |
+77:42:41.6 |
HIP 78284 |
12.35 |
| 2026-08-10 00:00 |
16:02:50.50 |
+77:39:45.6 |
HIP 78284 |
13.07 |
| 2026-08-10 12:00 |
16:02:50.63 |
+77:36:47.5 |
HIP 78284 |
14.45 |
| 2026-08-11 00:00 |
16:02:52.36 |
+77:33:47.4 |
HIP 78284 |
16.34 |
| 2026-08-11 12:00 |
16:02:55.70 |
+77:30:45.3 |
HIP 78284 |
18.62 |
| 2026-08-12 00:00 |
16:03:00.64 |
+77:27:41.3 |
HIP 78284 |
21.17 |
| 2026-08-12 12:00 |
16:03:07.16 |
+77:24:35.3 |
HIP 78284 |
23.91 |
| 2026-08-13 00:00 |
16:03:15.28 |
+77:21:27.5 |
HIP 78284 |
26.82 |
| 2026-08-13 12:00 |
16:03:24.97 |
+77:18:17.7 |
HIP 79062 |
25.20 |
| 2026-08-14 00:00 |
16:03:36.23 |
+77:15:06.1 |
HIP 79062 |
22.44 |
| 2026-08-14 12:00 |
16:03:49.06 |
+77:11:52.7 |
HIP 79062 |
19.75 |
| 2026-08-15 00:00 |
16:04:03.45 |
+77:08:37.5 |
HIP 79062 |
17.18 |
| 2026-08-15 12:00 |
16:04:19.38 |
+77:05:20.5 |
HIP 79062 |
14.82 |
| 2026-08-16 00:00 |
16:04:36.85 |
+77:02:01.7 |
HIP 79062 |
12.84 |
| 2026-08-16 12:00 |
16:04:55.86 |
+76:58:41.1 |
HIP 79062 |
11.47 |
| 2026-08-17 00:00 |
16:05:16.39 |
+76:55:18.8 |
HIP 78661 |
9.73 |
| 2026-08-17 12:00 |
16:05:38.43 |
+76:51:54.7 |
HIP 78661 |
8.41 |
| 2026-08-18 00:00 |
16:06:01.98 |
+76:48:28.9 |
HIP 78661 |
8.64 |
| 2026-08-18 12:00 |
16:06:27.02 |
+76:45:01.3 |
HIP 78661 |
10.38 |
| 2026-08-19 00:00 |
16:06:53.56 |
+76:41:32.1 |
HIP 78661 |
13.10 |