메타데이터
| 항목 |
값 |
| Designation |
C/2025 D1 (Groeller) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2028-05-18T08:26:24.901440Z |
| Orbit solution date (soln_date, UTC) |
2026-04-08T14:12:15Z |
| Obs used |
183 |
| NEO |
- |
| M1 |
5.300 |
| K1 |
8.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2025-02-20T07:52:55.833600Z |
| Discovery magnitude (MPC) |
20.64 G |
| Discovery observatory (MPC) |
V00 · Kitt Peak-Bok |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2024-04-23.0000000 |
| e |
1.00293203 |
| q (au) |
14.122734 |
| a (au) |
-4816.715820 |
| i (deg) |
84.497131 |
| Ω (om, deg) |
312.882118 |
| ω (w, deg) |
185.843793 |
| M (ma, deg) |
-0.004382 |
밝기
산란 + 전체 선형
$$
M_a = (3.713 + 3.384\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
3.713 |
| n |
3.384 |
| gf |
0.998 |
| gb |
-0.584 |
| k |
1.000 |
| 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) |
| 2026-06-01 00:00 |
08:56:50.32 |
+29:58:01.0 |
HIP 44031 |
21.78 |
| 2026-06-01 12:00 |
08:56:53.77 |
+29:56:40.9 |
HIP 44031 |
22.31 |
| 2026-06-02 00:00 |
08:56:57.28 |
+29:55:20.7 |
HIP 44031 |
22.92 |
| 2026-06-02 12:00 |
08:57:00.85 |
+29:54:00.4 |
HIP 44031 |
23.60 |
| 2026-06-03 00:00 |
08:57:04.47 |
+29:52:40.1 |
HIP 44031 |
24.36 |
| 2026-06-03 12:00 |
08:57:08.15 |
+29:51:19.8 |
HIP 44031 |
25.19 |
| 2026-06-04 00:00 |
08:57:11.90 |
+29:49:59.3 |
HIP 44031 |
26.08 |
| 2026-06-04 12:00 |
08:57:15.69 |
+29:48:38.9 |
HIP 44031 |
27.03 |
| 2026-06-05 00:00 |
08:57:19.55 |
+29:47:18.3 |
HIP 44031 |
28.03 |
| 2026-06-05 12:00 |
08:57:23.46 |
+29:45:57.7 |
HIP 44031 |
29.08 |
| 2026-06-06 00:00 |
08:57:27.43 |
+29:44:37.1 |
HIP 44031 |
30.17 |
| 2026-06-06 12:00 |
08:57:31.45 |
+29:43:16.4 |
HIP 43952 |
30.79 |
| 2026-06-07 00:00 |
08:57:35.53 |
+29:41:55.6 |
HIP 43952 |
29.65 |
| 2026-06-07 12:00 |
08:57:39.67 |
+29:40:34.8 |
HIP 43952 |
28.54 |
| 2026-06-08 00:00 |
08:57:43.86 |
+29:39:14.0 |
HIP 43952 |
27.50 |
| 2026-06-08 12:00 |
08:57:48.10 |
+29:37:53.1 |
HIP 43952 |
26.51 |
| 2026-06-09 00:00 |
08:57:52.40 |
+29:36:32.2 |
HIP 43952 |
25.60 |
| 2026-06-09 12:00 |
08:57:56.75 |
+29:35:11.3 |
HIP 43952 |
24.76 |
| 2026-06-10 00:00 |
08:58:01.15 |
+29:33:50.3 |
HIP 43952 |
24.02 |
| 2026-06-10 12:00 |
08:58:05.61 |
+29:32:29.2 |
HIP 43952 |
23.37 |
| 2026-06-11 00:00 |
08:58:10.11 |
+29:31:08.2 |
HIP 43952 |
22.84 |
| 2026-06-11 12:00 |
08:58:14.68 |
+29:29:47.1 |
HIP 43952 |
22.42 |
| 2026-06-12 00:00 |
08:58:19.29 |
+29:28:25.9 |
HIP 43952 |
22.13 |
| 2026-06-12 12:00 |
08:58:23.95 |
+29:27:04.8 |
HIP 43952 |
21.98 |
| 2026-06-13 00:00 |
08:58:28.66 |
+29:25:43.6 |
HIP 43952 |
21.96 |
| 2026-06-13 12:00 |
08:58:33.43 |
+29:24:22.3 |
HIP 43952 |
22.09 |
| 2026-06-14 00:00 |
08:58:38.24 |
+29:23:01.1 |
HIP 43952 |
22.36 |
| 2026-06-14 12:00 |
08:58:43.11 |
+29:21:39.8 |
HIP 43952 |
22.76 |
| 2026-06-15 00:00 |
08:58:48.02 |
+29:20:18.6 |
HIP 43952 |
23.29 |
| 2026-06-15 12:00 |
08:58:52.98 |
+29:18:57.3 |
HIP 43952 |
23.95 |
| 2026-06-16 00:00 |
08:58:57.99 |
+29:17:35.9 |
HIP 43952 |
24.72 |
| 2026-06-16 12:00 |
08:59:03.04 |
+29:16:14.6 |
HIP 43952 |
25.59 |
| 2026-06-17 00:00 |
08:59:08.15 |
+29:14:53.3 |
HIP 43952 |
26.57 |
| 2026-06-17 12:00 |
08:59:13.29 |
+29:13:31.9 |
HIP 43952 |
27.63 |
| 2026-06-18 00:00 |
08:59:18.49 |
+29:12:10.5 |
HIP 43952 |
28.77 |
| 2026-06-18 12:00 |
08:59:23.73 |
+29:10:49.2 |
HIP 43952 |
29.98 |
| 2026-06-19 00:00 |
08:59:29.02 |
+29:09:27.8 |
HIP 43952 |
31.26 |
| 2026-06-19 12:00 |
08:59:34.35 |
+29:08:06.4 |
HIP 44211 |
29.77 |
| 2026-06-20 00:00 |
08:59:39.72 |
+29:06:45.0 |
HIP 44211 |
28.10 |
| 2026-06-20 12:00 |
08:59:45.14 |
+29:05:23.7 |
HIP 44211 |
26.44 |
| 2026-06-21 00:00 |
08:59:50.60 |
+29:04:02.3 |
HIP 44211 |
24.81 |
| 2026-06-21 12:00 |
08:59:56.10 |
+29:02:40.9 |
HIP 44211 |
23.19 |
| 2026-06-22 00:00 |
09:00:01.64 |
+29:01:19.6 |
HIP 44211 |
21.61 |